[Intel-gfx] gen6 (SNB) GPU still stalling besides latest patches

Nicolas Kalkhof nkalkhof at web.de
Tue Jun 21 20:38:51 CEST 2011

Thanks for bringing that up. Is there a bug report for this issue? I was just about to file a report myself but I don't want to create any duplicates.

@Chris: What do you mean with giving X a kick? Neither mouse nor keyboard are responding anymore. Killing X from a remote ssh is the only option. :(

Btw. This only happens with SNA enabled. When using the classic (UXA?), dropping back to framebuffer console works fine.
I too have a laptop (T420). Is this issues restricted to mobile systems only?

Thanks and regards,

-----Urspr√ľngliche Nachricht-----
Von: "Andrew Lutomirski" <luto at mit.edu>
Gesendet: Jun 21, 2011 8:24:21 PM
An: "Chris Wilson" <chris at chris-wilson.co.uk>
Betreff: Re: [Intel-gfx] gen6 (SNB) GPU still stalling besides latest patches

>On Tue, Jun 21, 2011 at 2:18 PM, Chris Wilson <chris at chris-wilson.co.uk> wrote:
>> On Tue, 21 Jun 2011 19:41:52 +0200 (CEST), "Nicolas Kalkhof" <nkalkhof at web.de> wrote:
>>> However now it seems I'm unable to get my framebuffer console back after I bailed out of X. The screen stays black but my system is still responsive via ssh. This happens without your patch. I'll do some more investigation to make sure I didnt introduce this issue.
>> No, that's another bug with /dev/dri/card0 not honouring O_NONBLOCK. Give
>> X a swift kick and it'll wake up again.
>> -Chris
>Any plans on fixing this (and related bugs)? The SNA driver makes X
>freeze sometimes for me, and it's hard to recover on a laptop when
>ctrl-alt-backspace and even alt-sysrq-v don't seem to give me control
>of my system back.
>ssh-ing in and killall -9 Xorg works, but it's not so easy on a laptop.
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