Re: [RFC] Try a bit harder to get output on the screen at panictime

From: Maxim Levitsky
Date: Wed May 19 2010 - 21:13:15 EST

On Wed, 2010-05-19 at 17:34 -0700, Jesse Barnes wrote:
> On Fri, 9 Apr 2010 15:10:50 -0700
> Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx> wrote:
> > This set of 3 patches makes it a little more likely we'll get panic
> > output onto the screen even when X is running, assuming a KMS enabled
> > stack anyway.
> >
> > It gets me from a blank or very sparsely populated black screen at
> > panic time, to one including the full backtrace and panic output at
> > panic time (tested with "echo c > /proc/sysrq-trigger" from an X
> > session).
> >
> > It doesn't cover every case; for instance I think it'll fail when X has
> > disabled the display, but those cases need to be handled with separate
> > patches anyway (need to add atomic DPMS paths for instance).
> >
> > Anyway, please test these out and let me know if they work for you.
> Ping Linus & Dave again. Have you guys tried these? Really, it's cool.
Second that, just tested these patches, and these work perfectly.
One more reason for me to dump nvidia driver for nouveau.

Best regards,
Maxim Levitsky

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