Re: Re:Error43 Using SR-IOV In Alder Lake 140T from 265H

Mondin_Marco · ‎06-24-2025

I should clarify that I've compiled kernels 6.12.19 and 6.12.33 directly from Intel LTS Linux.
Checked 265H in your site is marked as SR-IOV supported on GPU.

With my previous 13000H everything worked perfectly; I could run multiple VMs.
However, I was limited to a specific driver version — if I updated, Error 43 was guaranteed.

Now, with a new Dell equipped with a 265H, I can't avoid that error no matter which driver I use.
I've tried dozens (Starting from original one issued by Dell).

I've also extracted the GOP file from the BIOS and passed it as a ROM file.

Below is my VM configuration KVm/LibVirt:

<domain xmlns:qemu="http://libvirt.org/schemas/domain/qemu/1.0" type="kvm">
<name>Win10Codesys</name>
<uuid>REMOVED FOR MANY REASONS</uuid>
<metadata>
<libosinfo:libosinfo xmlns:libosinfo="http://libosinfo.org/xmlns/libvirt/domain/1.0">
<libosinfo:os id="http://microsoft.com/win/10"/>
</libosinfo:libosinfo>
</metadata>
<memory unit="KiB">8388608</memory>
<currentMemory unit="KiB">8388608</currentMemory>
<memoryBacking>
<source type="memfd"/>
<access mode="shared"/>
</memoryBacking>
<vcpu placement="static">8</vcpu>
<iothreads>1</iothreads>
<cputune>
<vcpupin vcpu="0" cpuset="0"/>
<vcpupin vcpu="1" cpuset="1"/>
<vcpupin vcpu="2" cpuset="2"/>
<vcpupin vcpu="3" cpuset="3"/>
<vcpupin vcpu="4" cpuset="4"/>
<vcpupin vcpu="5" cpuset="5"/>
<vcpupin vcpu="6" cpuset="6"/>
<vcpupin vcpu="7" cpuset="7"/>
<emulatorpin cpuset="8-15"/>
<iothreadpin iothread="1" cpuset="8-15"/>
</cputune>
<sysinfo type="smbios">
<bios>
<entry name="vendor">Dell Inc.</entry>
<entry name="version">1.2.0</entry>
<entry name="date">03/21/2025</entry>
</bios>
<system>
<entry name="manufacturer">Dell Inc.</entry>
<entry name="product">Dell Pro Max 16 MC16250</entry>
<entry name="version">Not Specified</entry>
<entry name="serial">FB9JW94</entry>
<entry name="uuid">REMOVED FOR MANY REASONS</entry>
<entry name="sku">0CF1</entry>
<entry name="family">Dell Pro Max Laptops</entry>
</system>
<baseBoard>
<entry name="manufacturer">Dell Inc.</entry>
<entry name="product">0YHD6M</entry>
<entry name="version">A00</entry>
<entry name="serial">/FB9JW94/CNWSC0055200YF/</entry>
</baseBoard>
<chassis>
<entry name="manufacturer">Dell Inc.</entry>
<entry name="serial">FB9JW94</entry>
<entry name="sku">Notebook</entry>
</chassis>
</sysinfo>
<os firmware="efi">
<type arch="x86_64" machine="pc-q35-8.2">hvm</type>
<firmware>
<feature enabled="no" name="enrolled-keys"/>
<feature enabled="yes" name="secure-boot"/>
</firmware>
<loader readonly="yes" secure="yes" type="pflash">/usr/share/OVMF/OVMF_CODE_4M.secboot.fd</loader>
<nvram template="/usr/share/OVMF/OVMF_VARS_4M.fd">/var/lib/libvirt/qemu/nvram/Windows11Codesys.fd</nvram>
<boot dev="hd"/>
<bootmenu enable="yes"/>
<smbios mode="sysinfo"/>
</os>
<features>
<acpi/>
<apic/>
<hyperv mode="custom">
<relaxed state="on"/>
<vapic state="on"/>
<spinlocks state="on" retries="8191"/>
<vpindex state="on"/>
<runtime state="on"/>
<synic state="on"/>
<stimer state="on"/>
<vendor_id state="on" value="Dell Inc."/>
</hyperv>
<kvm>
<hidden state="on"/>
</kvm>
<vmport state="off"/>
<smm state="on"/>
</features>
<cpu mode="host-passthrough" check="none" migratable="on">
<topology sockets="1" dies="1" cores="8" threads="1"/>
<maxphysaddr mode="passthrough" limit="40"/>
<feature policy="disable" name="hypervisor"/>
</cpu>
<clock offset="localtime">
<timer name="rtc" tickpolicy="catchup"/>
<timer name="pit" tickpolicy="delay"/>
<timer name="hpet" present="no"/>
<timer name="hypervclock" present="yes"/>
</clock>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>destroy</on_crash>
<pm>
<suspend-to-mem enabled="no"/>
<suspend-to-disk enabled="no"/>
</pm>
<devices>
<emulator>/usr/bin/qemu-system-x86_64</emulator>
<disk type="file" device="disk">
<driver name="qemu" type="qcow2"/>
<source file="/media/storage/VMs/KVM/Win10Codesys/Win10Codesys.qcow2"/>
<target dev="sdb" bus="sata"/>
<address type="drive" controller="0" bus="0" target="0" unit="1"/>
</disk>
<disk type="file" device="cdrom">
<driver name="qemu" type="raw"/>
<target dev="sdc" bus="sata"/>
<readonly/>
<address type="drive" controller="0" bus="0" target="0" unit="2"/>
</disk>
<controller type="usb" index="0" model="nec-xhci" ports="15">
<address type="pci" domain="0x0000" bus="0x03" slot="0x00" function="0x0"/>
</controller>
<controller type="sata" index="0">
<address type="pci" domain="0x0000" bus="0x00" slot="0x1f" function="0x2"/>
</controller>
<controller type="pci" index="0" model="pcie-root"/>
<controller type="pci" index="1" model="pcie-root-port">
<model name="pcie-root-port"/>
<target chassis="1" port="0x10"/>
<address type="pci" domain="0x0000" bus="0x00" slot="0x04" function="0x0" multifunction="on"/>
</controller>
<controller type="pci" index="2" model="pcie-root-port">
<model name="pcie-root-port"/>
<target chassis="2" port="0x11"/>
<address type="pci" domain="0x0000" bus="0x00" slot="0x04" function="0x1"/>
</controller>
<controller type="pci" index="3" model="pcie-root-port">
<model name="pcie-root-port"/>
<target chassis="3" port="0x12"/>
<address type="pci" domain="0x0000" bus="0x00" slot="0x04" function="0x2"/>
</controller>
<controller type="pci" index="4" model="pcie-root-port">
<model name="pcie-root-port"/>
<target chassis="4" port="0x13"/>
<address type="pci" domain="0x0000" bus="0x00" slot="0x04" function="0x3"/>
</controller>
<controller type="pci" index="5" model="pcie-root-port">
<model name="pcie-root-port"/>
<target chassis="5" port="0x14"/>
<address type="pci" domain="0x0000" bus="0x00" slot="0x04" function="0x4"/>
</controller>
<controller type="pci" index="6" model="pcie-root-port">
<model name="pcie-root-port"/>
<target chassis="6" port="0x15"/>
<address type="pci" domain="0x0000" bus="0x00" slot="0x04" function="0x5"/>
</controller>
<controller type="pci" index="7" model="pcie-root-port">
<model name="pcie-root-port"/>
<target chassis="7" port="0x16"/>
<address type="pci" domain="0x0000" bus="0x00" slot="0x04" function="0x6"/>
</controller>
<controller type="pci" index="8" model="pcie-root-port">
<model name="pcie-root-port"/>
<target chassis="8" port="0x17"/>
<address type="pci" domain="0x0000" bus="0x00" slot="0x04" function="0x7"/>
</controller>
<controller type="pci" index="9" model="pcie-root-port">
<model name="pcie-root-port"/>
<target chassis="9" port="0x10"/>
<address type="pci" domain="0x0000" bus="0x00" slot="0x03" function="0x0" multifunction="on"/>
</controller>
<controller type="pci" index="10" model="pcie-to-pci-bridge">
<model name="pcie-pci-bridge"/>
<address type="pci" domain="0x0000" bus="0x06" slot="0x00" function="0x0"/>
</controller>
<controller type="pci" index="11" model="pcie-root-port">
<model name="pcie-root-port"/>
<target chassis="11" port="0x8"/>
<address type="pci" domain="0x0000" bus="0x00" slot="0x01" function="0x0" multifunction="on"/>
</controller>
<controller type="pci" index="12" model="pcie-root-port">
<model name="pcie-root-port"/>
<target chassis="12" port="0x9"/>
<address type="pci" domain="0x0000" bus="0x00" slot="0x01" function="0x1"/>
</controller>
<controller type="pci" index="13" model="pcie-root-port">
<model name="pcie-root-port"/>
<target chassis="13" port="0xa"/>
<address type="pci" domain="0x0000" bus="0x00" slot="0x01" function="0x2"/>
</controller>
<controller type="pci" index="14" model="pcie-root-port">
<model name="pcie-root-port"/>
<target chassis="14" port="0xb"/>
<address type="pci" domain="0x0000" bus="0x00" slot="0x01" function="0x3"/>
</controller>
<controller type="pci" index="15" model="pcie-root-port">
<model name="pcie-root-port"/>
<target chassis="15" port="0xc"/>
<address type="pci" domain="0x0000" bus="0x00" slot="0x01" function="0x4"/>
</controller>
<controller type="pci" index="16" model="pcie-root-port">
<model name="pcie-root-port"/>
<target chassis="16" port="0xd"/>
<address type="pci" domain="0x0000" bus="0x00" slot="0x01" function="0x5"/>
</controller>
<controller type="pci" index="17" model="pcie-root-port">
<model name="pcie-root-port"/>
<target chassis="17" port="0xe"/>
<address type="pci" domain="0x0000" bus="0x00" slot="0x01" function="0x6"/>
</controller>
<controller type="pci" index="18" model="pcie-root-port">
<model name="pcie-root-port"/>
<target chassis="18" port="0xf"/>
<address type="pci" domain="0x0000" bus="0x00" slot="0x01" function="0x7"/>
</controller>
<controller type="pci" index="19" model="pcie-root-port">
<model name="pcie-root-port"/>
<target chassis="19" port="0x10"/>
<address type="pci" domain="0x0000" bus="0x00" slot="0x02" function="0x0" multifunction="on"/>
</controller>
<controller type="pci" index="20" model="pcie-root-port">
<model name="pcie-root-port"/>
<target chassis="20" port="0x11"/>
<address type="pci" domain="0x0000" bus="0x00" slot="0x02" function="0x1"/>
</controller>
<controller type="pci" index="21" model="pcie-root-port">
<model name="pcie-root-port"/>
<target chassis="21" port="0x12"/>
<address type="pci" domain="0x0000" bus="0x00" slot="0x02" function="0x2"/>
</controller>
<controller type="pci" index="22" model="pcie-root-port">
<model name="pcie-root-port"/>
<target chassis="22" port="0x13"/>
<address type="pci" domain="0x0000" bus="0x00" slot="0x02" function="0x3"/>
</controller>
<controller type="pci" index="23" model="pcie-root-port">
<model name="pcie-root-port"/>
<target chassis="23" port="0x14"/>
<address type="pci" domain="0x0000" bus="0x00" slot="0x02" function="0x4"/>
</controller>
<controller type="pci" index="24" model="pcie-root-port">
<model name="pcie-root-port"/>
<target chassis="24" port="0x15"/>
<address type="pci" domain="0x0000" bus="0x00" slot="0x02" function="0x5"/>
</controller>
<controller type="pci" index="25" model="pcie-root-port">
<model name="pcie-root-port"/>
<target chassis="25" port="0x16"/>
<address type="pci" domain="0x0000" bus="0x00" slot="0x02" function="0x6"/>
</controller>
<controller type="pci" index="26" model="pcie-root-port">
<model name="pcie-root-port"/>
<target chassis="26" port="0x17"/>
<address type="pci" domain="0x0000" bus="0x00" slot="0x02" function="0x7"/>
</controller>
<controller type="pci" index="27" model="pcie-root-port">
<model name="pcie-root-port"/>
<target chassis="27" port="0x19"/>
<address type="pci" domain="0x0000" bus="0x00" slot="0x03" function="0x1"/>
</controller>
<controller type="pci" index="28" model="pcie-root-port">
<model name="pcie-root-port"/>
<target chassis="28" port="0x1a"/>
<address type="pci" domain="0x0000" bus="0x00" slot="0x03" function="0x2"/>
</controller>
<controller type="pci" index="29" model="pcie-root-port">
<model name="pcie-root-port"/>
<target chassis="29" port="0x1b"/>
<address type="pci" domain="0x0000" bus="0x00" slot="0x03" function="0x3"/>
</controller>
<controller type="pci" index="30" model="pcie-root-port">
<model name="pcie-root-port"/>
<target chassis="30" port="0x1c"/>
<address type="pci" domain="0x0000" bus="0x00" slot="0x03" function="0x4"/>
</controller>
<controller type="pci" index="31" model="pcie-root-port">
<model name="pcie-root-port"/>
<target chassis="31" port="0x1d"/>
<address type="pci" domain="0x0000" bus="0x00" slot="0x03" function="0x5"/>
</controller>
<controller type="pci" index="32" model="pcie-root-port">
<model name="pcie-root-port"/>
<target chassis="32" port="0x1e"/>
<address type="pci" domain="0x0000" bus="0x00" slot="0x03" function="0x6"/>
</controller>
<controller type="virtio-serial" index="0">
<address type="pci" domain="0x0000" bus="0x05" slot="0x00" function="0x0"/>
</controller>
<interface type="bridge">
<mac address="00:0c:29:5e:f6:dd"/>
<source bridge="BrService"/>
<model type="e1000e"/>
<link state="up"/>
<address type="pci" domain="0x0000" bus="0x02" slot="0x00" function="0x0"/>
</interface>
<serial type="pty">
<target type="isa-serial" port="0">
<model name="isa-serial"/>
</target>
</serial>
<console type="pty">
<target type="serial" port="0"/>
</console>
<channel type="unix">
<target type="virtio" name="org.qemu.guest_agent.0"/>
<address type="virtio-serial" controller="0" bus="0" port="1"/>
</channel>
<channel type="spicevmc">
<target type="virtio" name="com.redhat.spice.0"/>
<address type="virtio-serial" controller="0" bus="0" port="2"/>
</channel>
<input type="tablet" bus="usb">
<address type="usb" bus="0" port="1"/>
</input>
<input type="mouse" bus="ps2"/>
<input type="keyboard" bus="ps2"/>
<tpm model="tpm-tis">
<backend type="emulator" version="1.2"/>
</tpm>
<graphics type="spice">
<listen type="none"/>
<image compression="off"/>
<gl enable="no"/>
</graphics>
<audio id="1" type="spice"/>
<video>
<model type="none"/>
</video>
<hostdev mode="subsystem" type="pci" managed="yes">
<driver name="vfio"/>
<source>
<address domain="0x0000" bus="0x00" slot="0x02" function="0x3"/>
</source>
<rom file="/var/lib/libvirt/roms/IntelGopDriver.efi"/>
<address type="pci" domain="0x0000" bus="0x0a" slot="0x02" function="0x0"/>
</hostdev>
<redirdev bus="usb" type="spicevmc">
<address type="usb" bus="0" port="2"/>
</redirdev>
<redirdev bus="usb" type="spicevmc">
<address type="usb" bus="0" port="3"/>
</redirdev>
<watchdog model="itco" action="reset"/>
<memballoon model="virtio">
<address type="pci" domain="0x0000" bus="0x04" slot="0x00" function="0x0"/>
</memballoon>
</devices>
<qemu:override>
<qemu:device alias="hostdev0">
<qemu:frontend>
<qemu:property name="x-vga" type="bool" value="true"/>
<qemu:property name="rombar" type="unsigned" value="6"/>
</qemu:frontend>
</qemu:device>
</qemu:override>
</domain>

When booting Linux from a live environment inside VM, dmesg still shows something suspicious.

[ 10.632740] i915 0000:1e:02.0: [drm] *ERROR* Unrecognized display IP version 1023.255; disabling display.
[ 10.633210] ------------[ cut here ]------------
[ 10.633214] Missing case (((&(i915)->__runtime)->media.ip.ver) == 0)
[ 10.633286] WARNING: CPU: 5 PID: 1152 at drivers/gpu/drm/i915/intel_uncore.c:2397 uncore_forcewake_init+0x3c9/0x3e0 [i915]
[ 10.633366] Modules linked in: i915(+) intel_rapl_msr intel_rapl_common intel_uncore_frequency intel_uncore_frequency_common drm_buddy drm_display_helper platform_profile cec kvm_intel rc_core i2c_algo_bit dcdbas dell_wmi_descriptor video wmi sparse_keymap binfmt_misc joydev kvm i2c_i801 rapl i2c_mux intel_cstate i2c_smbus lpc_ich qemu_fw_cfg input_leds mac_hid serio_raw sch_fq_codel msr parport_pc ppdev lp parport efi_pstore nfnetlink dmi_sysfs ip_tables x_tables autofs4 overlay isofs nls_iso8859_1 dm_mirror dm_region_hash dm_log uas usb_storage hid_generic crct10dif_pclmul crc32_pclmul usbhid bochs polyval_clmulni hid drm_vram_helper polyval_generic drm_ttm_helper ghash_clmulni_intel e1000e psmouse sha256_ssse3 ttm ahci sha1_ssse3 libahci xhci_pci xhci_pci_renesas aesni_intel crypto_simd cryptd
[ 10.633409] CPU: 5 UID: 0 PID: 1152 Comm: (udev-worker) Not tainted 6.11.0-17-generic #17~24.04.2-Ubuntu
[ 10.633412] Hardware name: "Dell Inc." "Dell Pro Max 16 MC16250", BIOS 2024.02-2ubuntu0.4 06/04/2025
[ 10.633414] RIP: 0010:uncore_forcewake_init+0x3c9/0x3e0 [i915]
[ 10.633474] Code: 00 00 00 20 bb a5 c0 48 c7 43 78 60 7f a5 c0 e9 63 fd ff ff 0f b6 d0 48 c7 c6 08 29 e4 c0 48 c7 c7 90 b1 e8 c0 e8 07 cc 8a f8 <0f> 0b 41 bd ed ff ff ff e9 4b fc ff ff 66 2e 0f 1f 84 00 00 00 00
[ 10.633474] RSP: 0018:ffffb68f0068f5a0 EFLAGS: 00010246
[ 10.633478] RAX: 0000000000000000 RBX: ffff95618b957c28 RCX: 0000000000000000
[ 10.633479] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
[ 10.633479] RBP: ffffb68f0068f5b8 R08: 0000000000000000 R09: 0000000000000000
[ 10.633480] R10: 0000000000000000 R11: 0000000000000000 R12: ffff95618ecf0000
[ 10.633480] R13: 0000000000000000 R14: 0000000000000001 R15: 00000000ffffffff
[ 10.633481] FS: 000073e28e0918c0(0000) GS:ffff9562f7c80000(0000) knlGS:0000000000000000
[ 10.633482] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 10.633482] CR2: 00007c0edfc25530 CR3: 000000010d3d2001 CR4: 0000000000770ef0
[ 10.633485] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 10.633488] DR3: 0000000000000000 DR6: 00000000ffff07f0 DR7: 0000000000000400
[ 10.633488] PKRU: 55555554
[ 10.633491] Call Trace:
[ 10.633496] <TASK>
[ 10.633498] ? show_regs+0x6c/0x80
[ 10.633524] ? __warn+0x88/0x140
[ 10.633530] ? uncore_forcewake_init+0x3c9/0x3e0 [i915]
[ 10.633586] ? report_bug+0x182/0x1b0
[ 10.633600] ? handle_bug+0x6e/0xb0
[ 10.633611] ? exc_invalid_op+0x18/0x80
[ 10.633612] ? asm_exc_invalid_op+0x1b/0x20
[ 10.633622] ? uncore_forcewake_init+0x3c9/0x3e0 [i915]
[ 10.633675] intel_uncore_init_mmio+0x10e/0x360 [i915]
[ 10.633727] i915_driver_probe+0x108/0x600 [i915]
[ 10.633790] ? drm_privacy_screen_get+0x16d/0x190
[ 10.633802] ? acpi_dev_found+0x64/0x80
[ 10.633815] i915_pci_probe+0xd2/0x170 [i915]
[ 10.633867] local_pci_probe+0x44/0xb0
[ 10.633877] pci_call_probe+0x55/0x1a0
[ 10.633879] pci_device_probe+0x84/0x120
[ 10.633880] really_probe+0xee/0x3c0
[ 10.633889] __driver_probe_device+0x8c/0x180
[ 10.633891] driver_probe_device+0x24/0xd0
[ 10.633892] __driver_attach+0x10b/0x210
[ 10.633894] ? __pfx___driver_attach+0x10/0x10
[ 10.633895] bus_for_each_dev+0x8a/0xf0
[ 10.633896] driver_attach+0x1e/0x30
[ 10.633897] bus_add_driver+0x14e/0x290
[ 10.633898] driver_register+0x5e/0x130
[ 10.633900] __pci_register_driver+0x5e/0x70
[ 10.633901] i915_pci_register_driver+0x23/0x30 [i915]
[ 10.633952] i915_init+0x34/0x120 [i915]
[ 10.634008] ? __pfx_i915_init+0x10/0x10 [i915]
[ 10.634061] do_one_initcall+0x5b/0x340
[ 10.634068] do_init_module+0x97/0x2a0
[ 10.634078] load_module+0x6b5/0x7d0
[ 10.634079] init_module_from_file+0x96/0x100
[ 10.634080] idempotent_init_module+0x11c/0x310
[ 10.634081] __x64_sys_finit_module+0x64/0xd0
[ 10.634082] x64_sys_call+0x2580/0x25f0
[ 10.634083] do_syscall_64+0x7e/0x170
[ 10.634087] ? ksys_lseek+0x7d/0xd0
[ 10.634097] ? syscall_exit_to_user_mode+0x4e/0x250
[ 10.634100] ? do_syscall_64+0x8a/0x170
[ 10.634102] ? ovl_file_accessed+0x36/0xb0 [overlay]
[ 10.634111] ? backing_file_read_iter+0x151/0x1f0
[ 10.634120] ? vfs_read+0x178/0x390
[ 10.634121] ? vfs_read+0x178/0x390
[ 10.634122] ? rseq_get_rseq_cs+0x22/0x260
[ 10.634132] ? rseq_ip_fixup+0x8f/0x1f0
[ 10.634133] ? restore_fpregs_from_fpstate+0x3d/0xd0
[ 10.634136] ? switch_fpu_return+0x50/0xe0
[ 10.634138] ? syscall_exit_to_user_mode+0x18d/0x250
[ 10.634139] ? do_syscall_64+0x8a/0x170
[ 10.634140] ? switch_fpu_return+0x50/0xe0
[ 10.634141] ? syscall_exit_to_user_mode+0x18d/0x250
[ 10.634142] ? do_syscall_64+0x8a/0x170
[ 10.634143] ? syscall_exit_to_user_mode+0x4e/0x250
[ 10.634144] ? do_syscall_64+0x8a/0x170
[ 10.634145] ? __x64_sys_openat+0x55/0xa0
[ 10.634147] ? syscall_exit_to_user_mode+0x4e/0x250
[ 10.634148] ? clear_bhb_loop+0x15/0x70
[ 10.634149] ? clear_bhb_loop+0x15/0x70
[ 10.634150] ? clear_bhb_loop+0x15/0x70
[ 10.634150] entry_SYSCALL_64_after_hwframe+0x76/0x7e
[ 10.634152] RIP: 0033:0x73e28e85625d
[ 10.634154] Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 8b bb 0d 00 f7 d8 64 89 01 48
[ 10.634155] RSP: 002b:00007fffb8128f28 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[ 10.634156] RAX: ffffffffffffffda RBX: 00005a898ae62490 RCX: 000073e28e85625d
[ 10.634156] RDX: 0000000000000004 RSI: 000073e28e99307d RDI: 000000000000001b
[ 10.634157] RBP: 00007fffb8128fe0 R08: 0000000000000040 R09: 00007fffb8128f70
[ 10.634157] R10: 000073e28e932b20 R11: 0000000000000246 R12: 000073e28e99307d
[ 10.634158] R13: 0000000000020000 R14: 00005a898ae60640 R15: 00005a898ae65e20
[ 10.634158] </TASK>
[ 10.634159] ---[ end trace 0000000000000000 ]---
[ 10.691650] i915 0000:1e:02.0: Device initialization failed (-19)

Here is some other info:
[marco@marcoLaptop][~]$ lspci -nnk
00:00.0 Host bridge [0600]: Intel Corporation Device [8086:7d06] (rev 05)
       Subsystem: Dell Device [1028:0cf1]
       Kernel driver in use: igen6_edac
       Kernel modules: igen6_edac
00:02.0 VGA compatible controller [0300]: Intel Corporation Arrow Lake-P [Intel Graphics] [8086:7d51] (rev 03)
       Subsystem: Dell Device [1028:0cf1]
       Kernel driver in use: i915
       Kernel modules: i915, xe
00:02.1 VGA compatible controller [0300]: Intel Corporation Arrow Lake-P [Intel Graphics] [8086:7d51] (rev 03)
       Subsystem: Dell Device [1028:0cf1]
       Kernel driver in use: vfio-pci
       Kernel modules: i915, xe
00:02.2 VGA compatible controller [0300]: Intel Corporation Arrow Lake-P [Intel Graphics] [8086:7d51] (rev 03)
       Subsystem: Dell Device [1028:0cf1]
       Kernel driver in use: vfio-pci
       Kernel modules: i915, xe
00:02.3 VGA compatible controller [0300]: Intel Corporation Arrow Lake-P [Intel Graphics] [8086:7d51] (rev 03)
       Subsystem: Dell Device [1028:0cf1]
       Kernel driver in use: vfio-pci
       Kernel modules: i915, xe

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash intel_iommu=on iommu=pt i915.force_probe=7d51 xe.force_probe=!7d51 i915.enable_guc=3 i915.max_vfs=3"

Mike_Intel · ‎06-24-2025

Hello Mondin_Marco,

Thank you for posting in Intel community Forum.

For me to further investigate this issue, please help provide the following details:

What is the model of your processor?
What is the brand and model of your system or motherboard?
Can you tell me more information about the set up?

If you have questions, please let us know. Thank you.

Best regards,

Michael L.

Intel Customer Support Technician

Mondin_Marco · ‎06-25-2025

Thank you for the prompt reply.

I’m running a Dell Pro Max 16 notebook with 32 GB of RAM, a 265H processor, and Intel ARC 140T graphics.

According to Intel’s documentation, this GPU family is listed as SR-IOV-capable (just like my previous Raptor Lake 13700H in an HP laptop, which handled SR-IOV flawlessly):
(https://www.intel.com/content/www/us/en/support/articles/000093216/graphics/processor-graphics.html)

To enable SR-IOV I compiled the linux-intel-lts kernel from:
https://github.com/intel/linux-intel-lts/tree/lts-v6.12.33-linux-250614T193704Z

On the older laptop I used kernel 6.12.19 and ran two Windows 11 VMs plus an Ubuntu 24.04 host at 60 FPS on the WebGL Aquarium demo (https://webglsamples.org/aquarium/aquarium.html) opened in three browsers—one on the host and one in each VM.

This is the only kernel that supports SR-IOV out of the box; I avoid https://github.com/strongtz/i915-sriov-dkms because it is too unstable.

To display the VMs I use PARSEC and xfreerdp3 (self-compiled to enable H.264 on Ubuntu).

At boot everything looks fine: all VFs appear in lspci, 00:02.0 is handled by i915, while 00:02.1-7 are bound to vfio.

However, when a VM boots with the Dell-supplied graphics drivers, your drivers in old or new versions, I immediately encounter Error Code 43. If I start a Linux live VM on one VF, the i915 driver crashes as shown in the logs above.

Mondin_Marco · ‎06-26-2025

I just tried your https://github.com/intel/mainline-tracking/tree/linux/v6.15
Enabled SR-IOV in XE driver Error 43 still there in Windows11 VM.

If I try a Ubuntu VM forcing XE kernel module I see

xe 0000:00:02.0: [drm] ERROR Hardware reports unknown graphics version 0.0

I think it could be root cause of Error Code 43 in windows.

Mike_Intel · ‎06-26-2025

Hello Mondin_Marco,

Thank you for the update.

Can you try to generate the SSU logs of your system for me to check the configuration and installed drivers?

This will help me to further investigate the cause of the error:

Intel® System Support Utility for the Linux* Operating System

If you have questions, please let us know. Thank you.

Best regards,

Michael L.

Intel Customer Support Technician

Mondin_Marco · ‎06-27-2025

Attached are the 3 logs:

Host: Ubuntu 24.04 with Intel Mainline Tracking Kernel 6.15 (on PF)

Guest: Windows 11 Pro (on VF3)

Guest: Lubuntu 24.04 (on VF3)

Best regards, and thank you again for your prompt responses.

Mike_Intel · ‎06-29-2025

Hello Mondin_Marco,

Thank you for the information provided.

I will do further research on this matter and post the response on this thread once it is available.

If you have questions, please let us know. Thank you.

Best regards,

Michael L.

Intel Customer Support Technician

Mike_Intel · ‎07-03-2025

Hello Mondin_Marco,

I hope this message finds you well.

I want to update you that I am in the processor to recreate the issue on our end.

In order to better conduct our investigation, please help share the exact steps to recreate the issue that you encountered.

I need to obtain this information to speed up the investigation of this issue.

If you have questions, please let us know. Thank you.

Best regards,

Michael L.

Intel Customer Support Technician

Mondin_Marco · ‎07-09-2025

To reproduce the issue, I cloned your repository https://github.com/intel/mainline-tracking/
Selecting the 6.15 branch.

I compiled it two weeks ago, then pulled again yesterday since you committed several changes related to SR-IOV in the XE driver last week, and recompiled.

I signed both the modules and the kernel with my personal signature so I could use Secure Boot.
(This signature was enrolled with mokutils on all my devices)

To compile, I applied a small patch to enable SR-IOV on Arrow Lake, since by default it's treated as Meteor Lake (which theoretically shouldn't support SR-IOV, although it seems that for some users it works with the i915 driver).

Here is the patch:

commit 093f71602d22a9aaedfdf8e26c13cf57cf428560
Author: mondinmr <mondinmr@gmail.com>
Date:   Mon Jul 7 10:45:37 2025 +0200

   My SR-IOV Patch

diff --git a/drivers/gpu/drm/xe/xe_pci.c b/drivers/gpu/drm/xe/xe_pci.c 
index 7c347063a382..9ea6c7854ea5 100644 
--- a/drivers/gpu/drm/xe/xe_pci.c 
+++ b/drivers/gpu/drm/xe/xe_pci.c 
@@ -327,11 +327,22 @@ static const struct xe_device_desc mtl_desc = { 
       .has_pxp = true, 
}; 
 
+static const struct xe_device_desc arl_desc = { 
+       /* .graphics and .media determined via GMD_ID */ 
+       .require_force_probe = true, 
+       PLATFORM(METEORLAKE), 
+       .dma_mask_size = 46, 
+       .has_display = true, 
+     .has_sriov = true, 
+       .has_pxp = true, 
+}; 
+ 
static const struct xe_device_desc lnl_desc = { 
       PLATFORM(LUNARLAKE), 
       .dma_mask_size = 46, 
       .has_display = true, 
       .has_pxp = true, 
+       .has_heci_cscfi = 1, 
}; 
 
static const struct xe_device_desc bmg_desc = { 
@@ -372,7 +383,7 @@ static const struct pci_device_id pciidlist[] = { 
       INTEL_RPLS_IDS(INTEL_VGA_DEVICE, &adl_s_desc), 
       INTEL_DG1_IDS(INTEL_VGA_DEVICE, &dg1_desc), 
       INTEL_ATS_M_IDS(INTEL_VGA_DEVICE, &ats_m_desc), 
-       INTEL_ARL_IDS(INTEL_VGA_DEVICE, &mtl_desc), 
+       INTEL_ARL_IDS(INTEL_VGA_DEVICE, &arl_desc), 
       INTEL_DG2_IDS(INTEL_VGA_DEVICE, &dg2_desc), 
       INTEL_MTL_IDS(INTEL_VGA_DEVICE, &mtl_desc), 
       INTEL_LNL_IDS(INTEL_VGA_DEVICE, &lnl_desc),

I tested with QEMU from Ubuntu 24.04 as well as the latest QEMU from git, compiled with Ubuntu's configuration and packaged into a DEB.

However, I believe SR-IOV support for the Linux XE driver is still not fully implemented for Arrow Lake. Looks like I’ll have to wait.

Mike_Intel · ‎07-08-2025

Hello Mondin_Marco,

I hope this message finds you well.

Were you able to check the previous post?

Please let us know if you still need assistance.

Best regards,

Michael L.

Intel Customer Support Technician

Mike_Intel · ‎07-09-2025

Hello Mondin_Marco,

Thank you for guide that you provided.

Let me go ahead and check this again and post the response on this thread once it is available.

If you have questions, please let us know. Thank you.

Best regards,

Michael L.

Intel Customer Support Technician

Mike_Intel · ‎07-14-2025

Hello Mondin_Marco,

I hope this message finds you well.

For me to document the issue and try this in the lab, please help provide the following details:

What is the Virtual Machine software you're using within Ubuntu?
Prior to compiling the main line kernels, did you use the driver installation steps from https://dgpu-docs.intel.com/driver/client/overview.html

If you have questions, please let us know. Thank you.

Best regards,

Michael L.

Intel Customer Support Technician

Mike_Intel · ‎07-17-2025

Hello Mondin_Marco,

I hope this message finds you well.

I am just sending a follow up if you were you able to review my previous post.

Please let us know if you still need assistance.

Best regards,

Michael L.

Intel Customer Support Technician

Mike_Intel · ‎07-22-2025

Hello Mondin_Marco,

I hope you are having a good day.

I am sending another follow up on the information that I requested.

Since we have not heard back from you, I need to close this inquiry.

If you need further assistance, please post a new question as this thread will no longer be monitored.

Thank you and have a great day.

Best regards,

Michael L.

Intel Customer Support Technician

Mondin_Marco · ‎10-17-2025

Finally, I’ve found a solution.

In KVM, Hyper-V must be changed from custom with options to passthrough.

<features>
  ...
  <hyperv mode="passthrough">
  </hyperv>
  ...
</features>

This change—without needing GOP or other parameters—allows SR-IOV to work on Windows 11 guests.

Tested on a host running the Intel mainline-tracking kernel 6.17.