On Wed, Jul 08, 2015 at 08:40:17AM +0200, Michal Hocko wrote:
I have just tried to boot 4.2-rc1 and cannot seem to reproduce the issue anymore.
On Tue 07-07-15 10:43:58, Daniel Vetter wrote: [...]
Can you please boot with drm.debug=0xf (lots more nois in dmesg with this) and reproduce? I only need the last few pages before the WARNING backtrace, just to understand a bit better what's going on there.
And 0xf debug level seem to paper over the problem because I do not see the warning even with 4.1 where I am able to reproduce this reliably. This suggests this is a timing sensitive issue.
Ok that's starting to get nasty. Can you please test what happens when you boot with drm.vblankoffdelay=0 and whether drm.vblankoffdelay=1000 has an effect on reproduction rate? No debug output needed. -Daniel