On Tue, Feb 02, 2016 at 05:35:49PM -0700, dann frazier wrote: > On Tue, Feb 02, 2016 at 02:51:20PM -0800, Matt Roper wrote: > > On Tue, Feb 02, 2016 at 03:21:30PM -0700, dann frazier wrote: > > > On Tue, Jan 26, 2016 at 09:40:27AM -0700, dann frazier wrote: > > > > On Tue, Jan 26, 2016 at 08:10:04AM -0700, dann frazier wrote: > > > > > On Tue, Jan 26, 2016 at 01:17:01PM +0200, Ville Syrjälä wrote: > > > > > > On Mon, Jan 25, 2016 at 09:35:26AM -0700, dann frazier wrote: > > > > > > > I've got a Lenovo T410 w/ an external display (DisplayPort<->HDMI). After > > > > > > > upgrading from a 4.2 kernel to a 4.3, I started hitting an issue where > > > > > > > the display thinks it has lost input for a few moments. Oddly, it > > > > > > > usually happens when I start typing in a terminal after a short period > > > > > > > of inactivity. > > > > > > > > > > > > > > I see no OS-side symptoms - there are no new messages in dmesg/syslog/Xorg > > > > > > > log, etc. > > > > > > > > > > > > Any fifo underrun reports in dmesg in general? > > > > > > > > > > Yes, several: > > > > > [ 1886.547409] [drm:ironlake_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun > > > > > > > > > > > > I reproduced with latest Linus master (@ 3e1e21c7b), and then > > > > > > > bisected down to the following commit: > > > > > > > > > > > > > > commit 7221fc333dbe1743a3dff155b03527fda90d4ec1 > > > > > > > Author: Matt Roper <matthew.d.roper@xxxxxxxxx> > > > > > > > Date: Thu Sep 24 15:53:08 2015 -0700 > > > > > > > > > > > > > > drm/i915: Eliminate usage of pipe_wm_parameters from ILK-style WM (v2) > > > > > > > > > > > > That's not in 4.3. > > > > > > > > > > Ah, you're right. I was going by the version in the Makefile at that commit, > > > > > which says 4.3.0-rc3. git naiveté. > > > > > > > > > > > As far as currentl Linus tree goes, you may want to try these: > > > > > > http://patchwork.freedesktop.org/patch/msgid/1452776015-22076-2-git-send-email-ville.syrjala@xxxxxxxxxxxxxxx > > > > > > http://patchwork.freedesktop.org/patch/msgid/1452776015-22076-1-git-send-email-ville.syrjala@xxxxxxxxxxxxxxx > > > > > > > > > > Building - I'll test and report back. > > > > > > > > fyi, the problem persists with 4.5-rc1 + these 2 patches. > > > > > > Hi - Is there any further information I can provide to assist with this? > > > > > > -dann > > > > Hi Dann. Could you test with > > > > http://patchwork.freedesktop.org/patch/72194/ > > > > and see if it has any effect on the behavior you see? > > Sure - what tree should I apply it to? (Doesn't seem to apply to > 4.5-rc2). > > -dann The patch is written against branch drm-intel-nightly from git://anongit.freedesktop.org/drm-intel Once the patch (or an updated version of it based on review feedback) gets merged to -nightly, it will get cherry-picked into our -fixes tree as well so that it shows up in an -rc release. Matt > > > Thanks! > > > > > > Matt > > > > -- Matt Roper Graphics Software Engineer IoTG Platform Enabling & Development Intel Corporation (916) 356-2795 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
