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mt7622/mt7915e e8450 kernel panic dmesg log #14303

Open xartin opened 11 months ago

xartin commented 11 months ago

Describe the bug

My router encountered a random kernel panic and wifi capability ceased functioning requiring a reboot. Only the wifi driver ceased functioning.

Here's the dmesg log dmesg-openwrt.log

The router is connected to a 1500 watt apc ups with a serviced battery module so electricity instability is not a concern that would have otherwise been a plausible contributing factor.

There have been no package version updates or any modifications besides enabling WED and hardware flow offloading to aid with 160hz wifi performance. The router model specifically is a Belkin rt3200

OpenWrt version

r23630-842932a63d

OpenWrt release

23.05.2

OpenWrt target/subtarget

mediatek/mt7622

Device

Linksys E8450 (UBI)

Image kind

Official downloaded image

Steps to reproduce

Unable to reproduce this as the occurrence was very random and the router had been running without interruption for several weeks. i expect there may be potential for rare or infrequent reoccurrence. the router has been functioning reliably since being rebooted. There is only one significant wifi client using this router's 5ghz wifi radio

Actual behaviour

No response

Expected behaviour

No response

Additional info

No response

Diffconfig

No response

Terms

rany2 commented 11 months ago

In 23.05 and current SNAPSHOT, if you enabled WED mt7915 driver is not able to recover from an error caused by the chip's firmware bugging out. If you have WED enabled, try disabling that and try again. After you've done that, you should be able to test if it worked immediately if echo 1 > /sys/kernel/debug/ieee80211/wl1/mt76/sys_recovery does not cause the driver to crash.

xartin commented 11 months ago

So in theory if I attempted testing using that debug recovery command with WED enabled there's a greater chance of reproducing and validating the kernel panic error?

I shall do that as soon as a network activity opportunity is available and reply with the results 👍

rany2 commented 11 months ago

Yes, if you want you can try with WED enabled and disabled but it's already a known issue with 23.05 and SNAPSHOT. It's been extensively written about over here: https://github.com/openwrt/mt76/issues/754