On Sat, Dec 30, 2017 at 12:53:58PM +0000, Jiri Kosina wrote: > 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)
Joonas, Chris, time to bring rc6_enable back on next-fixes before we remove this support entirely? > > - the warning, which triggers at not really deterministic time after boot, > but usually rather quickly Jiri, could you please report these issues separately on bugs.freedesktop.org? Are them regressions? Possible bisect? Please attach the dmesg booting with drm.debug=0x1e > > -- > Jiri Kosina > SUSE Labs > > _______________________________________________ > Intel-gfx mailing list > intel-...@lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/intel-gfx
