lkml.org 
[lkml]   [2010]   [Sep]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Any SYSRQ key to force mode switch to console mode when using KMS?
On Wed, 15 Sep 2010 19:40:37 +0200 Uwe Bonnes wrote:

> Hello,
>
> is there any SYSRQ key that forces the video system to console mode,
> especially when using KMS and allows to work on.

sysrq-v help message says:

force-fb(V) = "Restore framebuffer console"

> Since going to KMS on a Thinkpad R50 with ATI Radeon RV250 via going from
> Opensuse-11.2 to Opensuse-11.3 I experience frequent situations where I am
> left with a black screen, with only ALT-SYSREQ-C switching the screen back
> on and hard reboot as only chance to escape that situation.
>
> Situations that result in a black screen are:
>
> * Going with the mouse over the NOSCRIPT buttom in firefox. Load goes up and
> screen goes black after some seconds. xorg.log ends with "Backtrace", but no
> backtrace output...
>
> * Calling pm-hibernate on a system that has hibernated before. First
> pm-hibernate/wake-up-per power buttom sequence is successfull.
>
> Disabling KMS results in very slow "kaffeine" full screen output...
>
> pm-hibernate and firefox/noscript worked pre-KMS on opensuse-11.2.
>
> Some traces of other people hitting the NOSCRIPT xorg crash and others
> hitting the black unresponsive screen with KMS on RV250 are
> found on the net, but I didn't find a conclusive resolution.
>
> Opensuse default kernel and the recent Opensuse 2.6.36-rc3 kernel-of-the day
> were tested with no difference
>
> Thanks
>
> PS: I only follow linux-kernel via gmane.org, so if you need fast feedback,
> please CC me.

---
~Randy
*** Remember to use Documentation/SubmitChecklist when testing your code ***


\
 
 \ /
  Last update: 2010-09-22 00:13    [W:0.105 / U:0.188 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site