usb audio is not able to use after boot from 5.10.0-1017-oem

[Kai-Chuan Hsieh]

I got below error, when plug usb-c headset to my system. and usb audio is not able to use, however, the usb audio works on 5.10.0-1014-oem on my system:

Mar 11 20:20:46 kchsieh-Latitude-9510 kernel: BUG: kernel NULL pointer dereference, address: 0000000000000012
Mar 11 20:20:46 kchsieh-Latitude-9510 kernel: #PF: supervisor read access in kernel mode
Mar 11 20:20:46 kchsieh-Latitude-9510 kernel: #PF: error_code(0x0000) - not-present page
Mar 11 20:20:46 kchsieh-Latitude-9510 kernel: PGD 0 P4D 0
Mar 11 20:20:46 kchsieh-Latitude-9510 kernel: Oops: 0000 [#1] SMP NOPTI
Mar 11 20:20:46 kchsieh-Latitude-9510 kernel: CPU: 2 PID: 364 Comm: systemd-udevd Not tainted 5.10.0-1017-oem #18-Ubuntu
Mar 11 20:20:46 kchsieh-Latitude-9510 kernel: Hardware name: Dell Inc. Latitude 9510/, BIOS 1.4.2 12/22/2020
Mar 11 20:20:46 kchsieh-Latitude-9510 kernel: RIP: 0010:usb_audio_probe+0x2e3/0x5c0 [snd_usb_audio]
Mar 11 20:20:46 kchsieh-Latitude-9510 kernel: Code: 48 83 7d b8 00 48 8b 7d c8 74 17 48 8b 45 b8 80 78 14 00 74 0d 48 8b 75 b0 e8 59 81 01 00 48 8b 7d c8 48 8b 45 b8 48 8b 75 b0 <0f> b7 40 12 66 89 87 9c 00 00 00 48 63 07 48 89 3c c5 60 5a fd c0
Mar 11 20:20:46 kchsieh-Latitude-9510 kernel: RSP: 0000:ffffad254067fa40 EFLAGS: 00010246
Mar 11 20:20:46 kchsieh-Latitude-9510 kernel: RAX: 0000000000000000 RBX: ffffffffc0fd5c60 RCX: ffff8dff8a7372c8
Mar 11 20:20:46 kchsieh-Latitude-9510 kernel: RDX: ffff8dff8a737ec8 RSI: ffff8dff82e2f400 RDI: ffff8dff870c88b8
Mar 11 20:20:46 kchsieh-Latitude-9510 kernel: RBP: ffffad254067faa0 R08: 000000000000006d R09: 0000000000000022
Mar 11 20:20:46 kchsieh-Latitude-9510 kernel: R10: 000000000000000b R11: a032b784ff8dffff R12: 0000000000000000
Mar 11 20:20:46 kchsieh-Latitude-9510 kernel: R13: ffffffffc0fd5c60 R14: 0000000000000000 R15: ffffffffc0fd5d60
Mar 11 20:20:46 kchsieh-Latitude-9510 kernel: FS: 00007f017910d8c0(0000) GS:ffff8e0105680000(0000) knlGS:0000000000000000
Mar 11 20:20:46 kchsieh-Latitude-9510 kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Mar 11 20:20:46 kchsieh-Latitude-9510 kernel: CR2: 0000000000000012 CR3: 000000010749e006 CR4: 00000000003706e0
Mar 11 20:20:46 kchsieh-Latitude-9510 kernel: Call Trace:

[Kai-Heng Feng (kaihengfeng)]

https://people.canonical.com/~khfeng/lp1918670/

[Kai-Chuan Hsieh (kchsieh)]

reply #2.

The test kernel looks good to me. my usb audio headset works successfully.

[mark maurer (m6032)]

After upgrading from kernel 5.10.0-1016-oem to 5.10.0-1017-oem my usb headset stopped working and was not recognized in settings as an audio output option. Also the usb connection to my weather station data logger stopped working. Also, I could not open my appimage of keepassxc to log into launchpad. Downgrading to kernel 5.10.0-1016-oem resolved all of these issues. My system is an HP Z230 with a Xeon E3-1245v3 and 16Gb memory.

[Timo Aaltonen (tjaalton)]

the commits to fix this are in 5.10.24, so marked the bug as a dupe of the tracker bug for .24