On Fri, Jan 07, 2022 at 06:10:09PM +0100, Alessandro De Laurenzis wrote: > Greetings, > > This is one of my hardest reports, since both the symptoms and the overall > context are rather obscure... > > On a Thinkpad T430 (complete dmesg in attachment) equipped with a Intel > Centrino Ultimate-N 6300 wireless card I'm experiencing periodical hiccups > (meaning that the system seems to freeze for a few tens of milliseconds, > this is particularly evident when moving the mouse, typing or watching a > video); it seems that the culprit is the wifi interface (i.e. if I switch it > off or simply force it down using ifconfig, the problem goes away). > > In 7.0 I see a lot of "iwn0: Fatal firmware error" messages, and this is > what is reported after enabling the debug mode:
> > iwn0: fatal firmware error > > firmware error log: > > error type = "SYSASSERT" (0x00000005) > > program counter = 0x00002A9C > > source line = 0x000002C1 > > error data = 0x0000000000000000 > > branch link = 0x00002A7600002A76 > > interrupt link = 0x0000153200000000 > > time = 165 These firmware crash reports cannot be made sense of without Intel proprietary information which we do not have access to. We will need to figure out which behaviour of the driver triggers this and then work our way out from there. So it would help to see more context from debug mode, such as whether state transitions ocurred (SCAN -> AUTH, and such) right before the crash. These messages also appear in /var/log/messages where they have timestamps which might help with correlating events. We might have to add some debugging code to the driver to obtain more information about this issue. But please send a complete debug log first. Cheers, Stefan
