On Thu, 2019-07-11 at 20:25 +0000, Souza, Jose wrote: > On Thu, 2019-07-11 at 13:11 -0700, James Bottomley wrote: > > On Thu, 2019-07-11 at 10:29 +0100, Chris Wilson wrote: > > > Quoting James Bottomley (2019-06-29 19:56:52) > > > > The symptoms are really weird: the screen image is locked in > > > > place. The machine is still functional and if I log in over > > > > the network can do anything I like, including killing the X > > > > server and the display will never alter. It also seems that > > > > the system is accepting keyboard input because when it freezes > > > > I can cat information to a file (if the mouse was over an > > > > xterm) and verify over the network the file contents. Nothing > > > > unusual appears in dmesg when the lockup happens. > > > > > > > > The last kernel I booted successfully on the system was 5.0, so > > > > I'll try compiling 5.1 to narrow down the changes. > > > > > > It's likely this is panel self-refresh going haywire. > > > > > > commit 8f6e87d6d561f10cfa48a687345512419839b6d8 > > > Author: José Roberto de Souza <jose.souza@xxxxxxxxx> > > > Date: Thu Mar 7 16:00:50 2019 -0800 > > > > > > drm/i915: Enable PSR2 by default > > > > > > The support for PSR2 was polished, IGT tests for PSR2 was > > > added and > > > it was tested performing regular user workloads like > > > browsing, > > > editing documents and compiling Linux, so it is time to > > > enable it by > > > default and enjoy even more power-savings. > > > > > > Temporary workaround would be to set i915.enable_psr=0 > > > > It looks plausible. I have to say I was just about to mark a > > bisect containing this as good, but that probably reflects my > > difficulty > > reproducing the issue. > > Take at look of what PSR version is supported by your panel, it > likely that a notebook shipped with Skylake will have panel that > supports only PSR1 so that patch has no effect on your machine. > > sudo more /sys/kernel/debug/dri/0/i915_edp_psr_status > Sink support: yes [0x01] It says Sink support: yes [0x01] PSR mode: PSR1 enabled Source PSR ctl: enabled [0x81f00726] Source PSR status: IDLE [0x04010212] Busy frontbuffer bits: 0x00000000 I've also updated to the released 5.2 kernel and am running with the debug parameters you requested ... but so far no reproduction. James _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
