On Mon, Jan 23, 2012 at 7:01 PM, Torsten Kaiser <just.for.lkml at googlemail.com> wrote: > On Mon, Jan 23, 2012 at 5:57 PM, Jerome Glisse <j.glisse at gmail.com> wrote: >> On Sat, Jan 21, 2012 at 08:03:37PM +0100, Torsten Kaiser wrote: >>> After updating to kernel 3.3-rc1 I have experienced a lockup of my GPU. >>> I left my KDE desktop running until the screensaver turned off the >>> monitors. But on key presses it would not turn back on. Ctrl+Alt+F1 to >>> switch to another virtual console also did not work. >>> Alt+SysRq magic still worked, so I was able to force the syslog to >>> disk and restart the system. >>> >> >> Can you test if attached patch help your case ? > > Patch is installed, but I can't reproduce the hang on demand. > It did happen a second time yesterday while letting the screensaver > kick in, but only at around the third or fourth try. Just using "xset > dpms force standby/suspend/off" did not trigger it.
I think the patch did what it was intended to do, but it did not really help. While the GPU reset did seem to work, X still got stuck and was not able to turn the monitors back on.