On Sat, 30 Dec 2017, Jiri Kosina wrote: > Seems like disabling RC6 on the kernel command line works this around, and > I can dock / undock several times in a row with the image always coming > up properly on the external display. > > On the first undock, the WARN_ONCE() below triggers, so I believe each > undock leaks memory. > > [ 38.755084] Failed to release pages: bind_count=1, pages_pin_count=1, pin_global=0 > [ 38.755138] WARNING: CPU: 3 PID: 96 at ../drivers/gpu/drm/i915/i915_gem_userptr.c:89 cancel_userptr+0xe5/0xf0 [i915] OK, I am seeing this warning with current Linus' tree (5aa90a845) even without any attempt to dock/undock, so it's probably unrelated to external outputs and it only by coincidence appeared originally at the same time I docked the machine. So there are two separate issues on this machine with latest kernel (neither of them probably being regression): - I have to disable i915 RC6 at the kernel cmdline, otherwise external (dock) display gets output only randomly (seems like always only on first dock) - the warning, which triggers at not really deterministic time after boot, but usually rather quickly -- Jiri Kosina SUSE Labs _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
