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Date: Tue, 24 Aug 2010 11:54:26 +0300 From: Pekka Enberg <penberg@...nel.org> To: Ivan Bulatovic <combuster@....com> Cc: linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org, jbarnes@...tuousgeek.org, eric@...olt.net, chris@...is-wilson.co.uk Subject: Re: i915: 2.6.36-rc2 wrong resolution on gdm start On Tue, Aug 24, 2010 at 4:00 AM, Ivan Bulatovic <combuster@....com> wrote: > While in init3, resolution is native, KMS works fine, no problems at > all. As soon as gdm starts it seems that TV1 output is recognized as > connected even if it isn't so resolution on VGA output is degraded from > native 1280x1024 to 1024x768 on startup. > > I've disabled LVDS output with video=LVDS-1:d because the cable looses > connection in certain lid positions. > > 2.6.36-rc1 didn't have this issue, 2.6.36-rc2 did so I've bisected and > it came down to this commit: > > 9d0498a2bf7455159b317f19531a3e5db2ecc9c4 is the first bad commit > commit 9d0498a2bf7455159b317f19531a3e5db2ecc9c4 > Author: Jesse Barnes <jbarnes@...tuousgeek.org> > Date: Wed Aug 18 13:20:54 2010 -0700 > > drm/i915: wait for actual vblank, not just 20ms > > Waiting for a hard coded 20ms isn't always enough to make sure a vblank > period has actually occurred, so add code to make sure we really have > passed through a vblank period (or that the pipe is off when disabling). > > This prevents problems with mode setting and link training, and seems to > fix a bug like https://bugs.freedesktop.org/show_bug.cgi?id=29278, but > on an HP 8440p instead. Hopefully also fixes > https://bugs.freedesktop.org/show_bug.cgi?id=29141. > > Signed-off-by: Jesse Barnes <jbarnes@...tuousgeek.org> > Signed-off-by: Eric Anholt <eric@...olt.net> > > :040000 040000 9941813d0f0bc4e141a87696d34f1d1b9087711b > 2e407ad1d03b60f0e5b020313a8a63bd176b4005 M drivers > > I'm sending you dmesg, xorg and xrandr logs as attachements. GM965 on > DELL Vostro 1310 is in question. Thanks, On Tue, Aug 24, 2010 at 4:00 AM, Ivan Bulatovic <combuster@....com> wrote: > While in init3, resolution is native, KMS works fine, no problems at > all. As soon as gdm starts it seems that TV1 output is recognized as > connected even if it isn't so resolution on VGA output is degraded from > native 1280x1024 to 1024x768 on startup. > > I've disabled LVDS output with video=LVDS-1:d because the cable looses > connection in certain lid positions. > > 2.6.36-rc1 didn't have this issue, 2.6.36-rc2 did so I've bisected and > it came down to this commit: > > 9d0498a2bf7455159b317f19531a3e5db2ecc9c4 is the first bad commit > commit 9d0498a2bf7455159b317f19531a3e5db2ecc9c4 > Author: Jesse Barnes <jbarnes@...tuousgeek.org> > Date: Wed Aug 18 13:20:54 2010 -0700 > > drm/i915: wait for actual vblank, not just 20ms > > Waiting for a hard coded 20ms isn't always enough to make sure a vblank > period has actually occurred, so add code to make sure we really have > passed through a vblank period (or that the pipe is off when disabling). > > This prevents problems with mode setting and link training, and seems to > fix a bug like https://bugs.freedesktop.org/show_bug.cgi?id=29278, but > on an HP 8440p instead. Hopefully also fixes > https://bugs.freedesktop.org/show_bug.cgi?id=29141. > > Signed-off-by: Jesse Barnes <jbarnes@...tuousgeek.org> > Signed-off-by: Eric Anholt <eric@...olt.net> > > :040000 040000 9941813d0f0bc4e141a87696d34f1d1b9087711b > 2e407ad1d03b60f0e5b020313a8a63bd176b4005 M drivers > > I'm sending you dmesg, xorg and xrandr logs as attachements. GM965 on > DELL Vostro 1310 is in question. Thanks, FWIW, I saw this on my MacBook as well. I was debugging a boot time oops at the time so I just changed screen resolution in Gnome to fix it. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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