This bug was fixed in the package linux-firmware - 1.187.29
---------------
linux-firmware (1.187.29) focal; urgency=medium
* mt7921e device disappear after warm boot stress (LP: #1963614)
- linux-firmware: update firmware for MT7921 WiFi device
linux-firmware (1.187.28) focal; urgency=medium
* bnx2x: Add FW 7.13.21.0 (LP: #1962155)
- bnx2x: Add FW 7.13.20.0
- bnx2x: Add FW 7.13.21.0
* Add missing firmware for HWE 5.15 kernel (LP: #1962299)
- linux-firmware: wilc1000: add wilc1000 v15.4 FW
- linux-firmware: Update AMD SEV firmware
- linux-firmware: Update AMD SEV firmware
- linux-firmware: Update AMD SEV firmware
- Mellanox: Add new mlxsw_spectrum firmware xx.2008.2406
- amdgpu: add initial support for navy flounder
- amdgpu: add arcturus firmware
- rtl_nic: add new firmware for RTL8153 and RTL8156 series
- amdgpu: update navy flounder firmware from 21.10
- amdgpu: update arcturus firmware from 21.10
- firmware: nvidia: Add VIC firmware for Tegra194
- amdgpu: update navy flounder firmware from 21.20
- amdgpu: update arcturus firmware from 21.20
- firmware/i915/guc: Add GuC v62.0.0 for all platforms
- firmware/i915/guc: Add GuC v62.0.3 for ADL-P
- firmware/i915/guc: Add HuC v7.9.3 for TGL & DG1
- iwlwifi: add ty firmware from Core63-43
- i915: Add v2.12 DMC for TGL
- i915: Add v2.03 DMC for RKL
- amdgpu: update arcturus firmware from 21.30
- amdgpu: update navy flounder firmware from 21.30
- amdgpu: add initial vangogh support
- rtl_nic: update firmware of RTL8153C
- linux-firmware: Update AMD SEV firmware
- amdgpu: update VCN firmware for vangogh
- amdgpu: update VCN firmware for navy flounder
- amdgpu: update arcturus firmware from 21.40
- amdgpu: update navy flounder firmware from 21.40
- amdgpu: add cyan skillfish firmware from 21.40
- amdgpu: update vangogh firmware from 21.40
- amdgpu: update vangogh DMCUB firmware
- linux-firmware: wilc1000: update WILC1000 firmware to v15.4.1
- iwlwifi: add new FWs from core63-136 release
- amdgpu: Add aldebaran firmware from 21.50
- amdgpu: Update arcturus firmware from 21.50
- amdgpu: Update cyan skillfish2 firmware from 21.50
- amdgpu: Update navy flounder firmware from 21.50
- amdgpu: Update vangogh firmware from 21.50
- WHENCE: link to similar config file for rtl8821a support
* Intermittent AX211 iwlwifi RT ucode init failed -110 at boot (LP: #1962515)
- iwlwifi: add new FWs from core64-96 release
* mt7921e device disappear after warm boot stress (LP: #1963614)
- linux-firmware: update firmware for mediatek bluetooth chip(MT7921)
-- Juerg Haefliger <[email protected]> Thu, 10 Mar 2022 08:05:39
+0100
** Changed in: linux-firmware (Ubuntu Focal)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1963614
Title:
mt7921e device disappear after warm boot stress
Status in HWE Next:
New
Status in OEM Priority Project:
New
Status in linux-firmware package in Ubuntu:
Fix Released
Status in linux-firmware source package in Focal:
Fix Released
Status in linux-firmware source package in Jammy:
Fix Released
Bug description:
[SRU Justification]
[Impact]
mt7921e may not appear in the bus enumeration during warm boot stress
tests.
[Fix]
This can only be fixed in the firmware.
[Test Case]
Run checkbox reboot stress tests to try trigger this issue:
$ checkbox-cli run com.canonical.certification::stress/reboot
[Where problems could occur]
While this backports proprietary fw blob, it may bring driver
compatibility issues we cannot know in the first place.
Jammy has these already, so only Focal (for oem-5.14) is nominated.
We don't have mt7921e hardware v2.1 support in Impish 5.13 kernel.
========== original bug report ==========
[Summary]
mt7921 wlan device disappear after warm reset, can be recovered by cold boot.
[Reproduce Steps]
1. do warm boot stress 100 times
2. check wifi function after stress finished
3. wifi has no function and mt7921e device disappeared
[Results]
Expected: wifi works normally
Actual: wifi broken
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