Re: Intel Wireless fatal error

[Martin Husemann <martin%duskware.de@localhost>]

On Tue, May 07, 2024 at 08:16:18AM +0000, Riccardo Mottola wrote:
> [  3574.054462] iwi0: autoconfiguration error: fatal error

The message is bogus, it has nothing to do with autoconfiguration.

"Fatal error" is a bit in the interrupt cause register of the intel
chipset. The driver can not do anything about it and resets the device
(simmilar to a "ifconfig iwi0 down). This is not a good error handling
strategy, as you have noticed - and it is also done very wrong in the
iwi_softintr handler.

The driver should clear the interrupt, schedule a reset and ignore all
other activity untill the reset has happened. Of course the reset should
include bringing up the device to full working state again.

However, this is obviously not easy to test and debug, as you will have to
be in a setup where this happens often enough (like your's).
If you have patience and would be able to help with this: compile your
kernel with "options IWI_DEBUG" and see if that enables enough login to
give us a hint about the cause. If that is not enough you would need to
raise iwi_debug to more than the default level of 4, but that would
spam your log with every received packet.

Please file a PR and lets collect data there.

Martin