Showing results for 
Search instead for 
Did you mean: 

wireless-AC 9260 truncated packets on ubuntu

Hi, I am using a laptop with wireless-AC 9260 on ubuntu

WiFi manages to connect to my access pointin WPA2 (see EAPOL message success below), but it apparently fails to get an IP address. I have tried with many access points and android hotspot.

Looking at tcpdump traces, it seems that the wifi interface receives a bunch of truncated IP messages in response to the bootp request.

How do I check if I have the right driver version, and right firmware?

All the relevant information is below I think.

Best Regards,


pierre@pierre-GF62-7RE:~$ sudo lshw -C network


description: Wireless interface

product: Intel Corporation

vendor: Intel Corporation

physical id: 0

bus info: pci@0000:02:00.0

logical name: wlp2s0

version: 29

serial: a0:c5:89:b5:42:30

width: 64 bits

clock: 33MHz

capabilities: pm msi pciexpress msix bus_master cap_list ethernet physical wireless

configuration: broadcast=yes driver=iwlwifi driverversion=4.13.0-37-generic firmware=33.610294.0 latency=0 link=yes multicast=yes wireless=IEEE 802.11

resources: irq:16 memory:df300000-df303fff


description: Ethernet interface

product: Killer E2400 Gigabit Ethernet Controller

vendor: Qualcomm Atheros

physical id: 0

bus info: pci@0000:03:00.0

logical name: enp3s0

version: 10

serial: 30:9c:23:14:c6:8b

size: 100Mbit/s

capacity: 1Gbit/s

width: 64 bits

clock: 33MHz

capabilities: pm pciexpress msi msix bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation

configuration: autonegotiation=on broadcast=yes driver=alx duplex=full ip= latency=0 link=yes multicast=yes port=twisted pair speed=100Mbit/s

resources: irq:19 memory:df200000-df23ffff ioport:d000(size=128)


pierre@pierre-GF62-7RE:~$ ls -al /lib/firmware/iwlwifi-

iwlwifi-1000-5.ucode iwlwifi-3160-9.ucode iwlwifi-6050-5.ucode iwlwifi-7265-17.ucode iwlwifi-8000C-16.ucode

iwlwifi-100-5.ucode iwlwifi-3168-21.ucode iwlwifi-7260-10.ucode iwlwifi-7265-8.ucode iwlwifi-8000C-21.ucode

iwlwifi-105-6.ucode iwlwifi-3168-22.ucode iwlwifi-7260-12.ucode iwlwifi-7265-9.ucode iwlwifi-8000C-27.ucode

iwlwifi-135-6.ucode iwlwifi-3168-27.ucode iwlwifi-7260-13.ucode iwlwifi-7265D-10.ucode iwlwifi-8000C-31.ucode

iwlwifi-2000-6.ucode iwlwifi-3168-29.ucode iwlwifi-7260-16.ucode iwlwifi-7265D-12.ucode iwlwifi-8265-21.ucode

iwlwifi-2030-6.ucode iwlwifi-3945-2.ucode iwlwifi-7260-17.ucode iwlwifi-7265D-13.ucode iwlwifi-8265-22.ucode

iwlwifi-3160-10.ucode iwlwifi-4965-2.ucode iwlwifi-7260-7.ucode iwlwifi-7265D-16.ucode iwlwifi-8265-27.ucode

iwlwifi-3160-12.ucode iwlwifi-5000-5.ucode iwlwifi-7260-8.ucode iwlwifi-7265D-17.ucode iwlwifi-8265-31.ucode

iwlwifi-3160-13.ucode iwlwifi-5150-2.ucode iwlwifi-7260-9.ucode iwlwifi-7265D-21.ucode iwlwifi-9000-pu-b0-jf-b0-33.ucode

iwlwifi-3160-16.ucode iwlwifi-6000-4.ucode iwlwifi-7265-10.ucode iwlwifi-7265D-22.ucode iwlwifi-9260-th-b0-jf-b0-33.ucode

iwlwifi-3160-17.ucode iwlwifi-6000g2a-5.ucode iwlwifi-7265-12.ucode iwlwifi-7265D-27.ucode

iwlwifi-3160-7.ucode iwlwifi-6000g2a-6.ucode iwlwifi-7265-13.ucode iwlwifi-7265D-29.ucode

iwlwifi-3160-8.ucode iwlwifi-6000g2b-6.ucode iwlwifi-7265-16.ucode iwlwifi-8000C-13.ucode

pierre@pierre-GF62-7RE:~$ iwconfig

enp3s0 no wireless extensions.

lo no wireless extensions.

wlp2s0 IEEE 802.11 ESSID:"PBV"

Mode:Managed Frequency:5.22 GHz Access Point: E0:91:F5:F9:FD:AE

Bit Rate=30 Mb/s Tx-Power=22 dBm

Retry short limit:7 RTS thr:off Fragment thr:off

Power Management:on

Link Quality=69/70 Signal level=-41 dBm

Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0

Tx excessive retries:0 Invalid misc:16 Missed beacon:0

pierre@pierre-GF62-7RE:~$ cat /proc/version

Linux version 4.13.0-37-generic (buildd@lcy01-amd64-026) (gcc version 7.2.0 (Ubuntu 7.2.0-8ubuntu3.2)) # 42-Ubuntu SMP Wed Mar 7 14:13:23 UTC 2018

pierre@pierre-GF62-7RE:~$ ifconfig

enp3s0: flags=4163 mtu 1500

inet netmask broadcast

inet6 fe80::e554:fec3:aee7:3e80 prefixlen 64 scopeid 0x20

ether 30:9c:23:14:c6:8b txqueuelen 1000 (Ethernet)

RX packets 36153 bytes 29619342 (29.6 MB)

RX errors 0 dropped 0 overruns 0 frame 0

TX packets 30045 bytes 5310107 (5.3 MB)

TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

device interrupt 19

lo: flags=73 mtu 65536

inet netmask

inet6 ::1 prefixlen 128 scopeid 0x10

loop txqueuelen 1000 (Local Loopback)

RX packets 6144 bytes 557630 (557.6 KB)

RX errors 0 dropped 0 overruns 0 frame 0

TX packets 6144 bytes 557630 (557.6 KB)

TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

wlp2s0: flags=4099 mtu 1500

ether a0:c5:89:b5:42:30 txqueuelen 1000 (Ethernet)

RX packets 1424 bytes 198826 (198.8 KB)

RX errors 0 dropped 0 overruns 0 frame 0

TX packets 1441 bytes 226659 (226.6 KB)

TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

pierre@pierre-GF62-7RE:~$ sudo tcpdump -vvv -i wlp2s0

23:20:46.120549 EAPOL key (3) v2, len 117

23:20:46.120860 EAPOL key (3) v1, len 117

23:20:46.128517 EAPOL key (3) v2, len 151

23:20:46.128681 EAPOL key (3) v1, len 95

23:20:46.164007 IP6 (hlim 1, next-header Options (0) payload length: 36) :: > ff02::16: HBH (rtalert: 0x0000) (padn) [icmp6 sum ok] ICMP6, multicast listener report v2, 1 group record(s) [gaddr ff02::1:ffde:1df6 to_ex { }]

23:20:46.176243 IP (tos 0x10, ttl 128, id 0, offset 0, flags [none], proto UDP (17), length 328) > [udp sum ok] BOOTP/DHCP, Request from a0:c5:89:b5:42:30 (oui Unknown), length 300, xid 0xce...

0 Kudos
1 Reply
Community Manager

Hello ubuntuuser,



We understand you're experiencing issues while trying to connect using the Intel® Wireless-AC 9260 on Ubuntu*.



Based on the outputs you've shared, it's possible that you may need to update to the latest firmware.



Your firmware: iwlwifi-9260-th-b0-jf-b0-33.ucode



Firmware listed on iwlwifi support page: iwlwifi-9260-th-b0-jf-b0-34.618819.0.tgz



To install this version you can run the following command:



# cp iwlwifi-*.ucode /lib/firmware



It's also important to note that the Intel® Wireless-AC 9260 is supported on Linux* starting on kernel 4.14 and on. You're currently on 4.13.



Related links and resources:



NOTE: Any links provided for third party tools or sites are offered for your convenience and should not be viewed as an endorsement by Intel® of the content, products, or services offered there. We do not offer support for any third party tool mentioned here.



- Linux* Support for Intel® Wireless Adapters


- Linux* Wireless Wiki


- Iwlwifi Bugs and support



Best regards,


Carlos A.
0 Kudos