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Message-ID: <CAPM=9tyarFzh4YdXz07rzhiSSNK149ov5LpZwehtC=UismKNBg@mail.gmail.com> Date: Fri, 20 Jun 2014 07:59:04 +1000 From: Dave Airlie <airlied@...il.com> To: "Theodore Ts'o" <tytso@....edu>, LKML <linux-kernel@...r.kernel.org>, "intel-gfx@...ts.freedesktop.org" <intel-gfx@...ts.freedesktop.org> Subject: Re: [Intel-gfx] Display glitching (and possibly related lockup) in 3.16-rc1? On 20 June 2014 02:09, Daniel Vetter <daniel@...ll.ch> wrote: > On Wed, Jun 18, 2014 at 12:14:55PM -0400, Theodore Ts'o wrote: >> Is this a known problem? >> >> On my T540p, occasionally the display will go black and then be >> completely locked. One time when this happened, the display started >> glitching and tearing (like what you might see if an analog display had >> a loose connector and it was being wiggled) when the system locked up, >> but the at least 75% of the time when the bug manifests, the screen goes >> black instead. >> >> This appears to only happen when the system is running on battery --- it >> doesn't seem to manifest if I'm plugged into the AC mains. And I've >> been typing an e-mail message when the system locks up, so I don't think >> it's related to DPMS or the screen saver kicking in. >> >> I can try to bisect this regression (3.15 didn't have this problem), but >> I thought I would ask first if this was a known problem. I don't know >> for certain that it's an i915 bug, but the symptoms do somewhat point in >> that direction, especially the display glitches. > > Doesn't ring a bell, but can you please boot with drm.debug=0xe and attach > dmesg here so we know what kind of hardware you have? Also any dying > breadths over netconsole or similar? Can't hurt to check that before doing > the bisect. > t540p are haswell. Dave. -- 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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