Messages in this thread | | | From | Uwe Bonnes <> | Date | Wed, 15 Sep 2010 19:40:37 +0200 | Subject | Any SYSRQ key to force mode switch to console mode when using KMS? |
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Hello,
is there any SYSRQ key that forces the video system to console mode, especially when using KMS and allows to work on.
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. -- Uwe Bonnes bon@elektron.ikp.physik.tu-darmstadt.de
Institut fuer Kernphysik Schlossgartenstrasse 9 64289 Darmstadt --------- Tel. 06151 162516 -------- Fax. 06151 164321 ----------
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