2014-05-13 18:38 GMT+02:00 Daniel Vetter <daniel@xxxxxxxx>: > On Tue, May 13, 2014 at 05:21:49PM +0200, Jörg Otte wrote: >> 2014-05-13 15:22 GMT+02:00 Daniel Vetter <daniel@xxxxxxxx>: >> > On Tue, May 13, 2014 at 12:38:41PM +0200, Daniel Vetter wrote: >> >> On Tue, May 13, 2014 at 12:29 PM, Jörg Otte <jrg.otte@xxxxxxxxx> wrote: >> >> >>> Branch drm-intel-nightly as of >> >> >>> ed60c27 drm-intel-nightly: 2014y-05m-09d-21h-51m-45s integration manifest >> >> >>> looks badly: >> >> >>> - KDE splash screen on boot-up is not visible >> >> >>> - x-windows don't have title and menu bars >> >> >>> - KDE system menu is not visible >> >> >>> - moving windows around destroys its content >> >> >> >> >> >> Ugh, that's ugly. Nothing else change like e.g. the version of >> >> >> xfree-video-intel? >> >> > >> >> > (II) Loading /usr/lib/xorg/modules/drivers/intel_drv.so >> >> > (II) Module intel: vendor="X.Org Foundation" >> >> > compiled for 1.11.3, module version = 2.17.0 >> >> > Module class: X.Org Video Driver >> >> > ABI class: X.Org Video Driver, version 11.0 >> >> >> >> Chris, any ideas? It's an ivybridge apparently. >> >> >> >> For the fifo underruns I think we've fully confirmed that they only >> >> happen on boot-up. I'll try to come up with some ideas what could have >> >> gone wrong there. >> > >> > Please test the below patch. >> > -Daniel >> > >> > diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c >> > index b10fbde1d5ee..63ced2dee027 100644 >> > --- a/drivers/gpu/drm/i915/i915_irq.c >> > +++ b/drivers/gpu/drm/i915/i915_irq.c >> > @@ -427,9 +427,6 @@ bool __intel_set_cpu_fifo_underrun_reporting(struct drm_device *dev, >> > >> > ret = !intel_crtc->cpu_fifo_underrun_disabled; >> > >> > - if (enable == ret) >> > - goto done; >> > - >> > intel_crtc->cpu_fifo_underrun_disabled = !enable; >> > >> > if (enable && (INTEL_INFO(dev)->gen < 5 || IS_VALLEYVIEW(dev))) >> > @@ -441,7 +438,6 @@ bool __intel_set_cpu_fifo_underrun_reporting(struct drm_device *dev, >> > else if (IS_GEN8(dev)) >> > broadwell_set_fifo_underrun_reporting(dev, pipe, enable); >> > >> > -done: >> > return ret; >> > } >> > >> > -- >> >> Doesn't work for me, I still have an underrun at boot-up. > > I'm at a loss tbh with ideas. We successfully disable both pipes, then > enable pipe A and it all works. > > Then we enable pipe B and _both_ pipes underrun immediately afterwards. > Really strange. Can you please reproduce the issue again on > drm-intel-nightly (latest -nightly should also have the display > corruptions fixed, so good to retest anyway) and attach a new dmesg with > drm.debug=0xe. > > Meanwhile I'll try to come up with new theories and ideas. The Display corruption fix works for me. Attached the dmesg with fifo underrun patch. Thanks, Jörg
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