[Ksummit-2012-discuss] [ATTEND] kernel core dump and "dying breath"

Jiri Kosina jkosina at suse.cz
Mon Jun 25 21:56:53 UTC 2012

On Mon, 25 Jun 2012, Dave Jones wrote:

>  > > I'm still not convinced any of this would be particularly useful. What 
>  > > would be a thousand times more useful would be having working scrollback 
>  > > when we panic, like we had circa 2.2
>  > 
>  > Admittedly my memory is not particularly good, so could please remind me 
>  > -- did the scrollback work in the 2.2 era also with USB keyboards?
>  > 
>  > I can quite easily imagine how to make it work with PS/2. USB, when 
>  > paniced, not really.
> That may have been the turning point at which it stopped working, which
> would explain it. Shame.

There also was a funny patchset which made the kernel output the panic 
message and stacktrace via morsecode on keyboard LEDs.

Same problem -- easy on PS/2 keyboards, but scheduling all the work 
necessary for completing URBs is just not possible from inside panic.

Jiri Kosina

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