I am compiling i915 GPU driver for Ubuntu 20.04 (kernel version: 5.15.0-97-lowlatency)
For compilation I am following the link provided on Intel Dashboard. Link is mentioned below:
Rebuild and Install Module i915 for GPU Analysis on Ubuntu* (intel.com)
I cloned the kernel repository maintained by Ubuntu and checkout the tag: Ubuntu-hwe-5.15-5.15.0-97.107_20.04.1 to match the kernel I am using.
All goes good. Driver is compiled successfully. I placed the driver as "extradriver" as per the above link. Updated the initramfs.
After bootup, display driver doesn't show all the resolutions, it was showing with original driver.
Now it shows only 1280x720.
I checked the dmesg logs, driver throw following error:
[ 4.021544] i915: no symbol version for module_layout
[ 4.021628] i915: loading out-of-tree module taints kernel.
[ 4.021628] i915: loading out-of-tree module taints kernel.
[ 4.026210] i915: module verification failed: signature and/or required key missing - tainting kernel
[ 4.033191] module: x86/modules: Skipping invalid relocation target, existing value is nonzero for type 1, loc 00000000eae9d500, val ffffffffc10e987d
Whereas same steps, work fine for ubuntu 18.04 (5.3.0-40-lowlatency) kernel.
