[Bug 35697] New: System locks up when watching fullscreen flash video

[Bug 35697] New: System locks up when watching fullscreen flash video

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https://bugs.freedesktop.org/show_bug.cgi?id=35697

           Summary: System locks up when watching fullscreen flash video
           Product: DRI
           Version: XOrg CVS
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: critical
          Priority: medium
         Component: DRM/Radeon
        AssignedTo: dri-devel@lists.freedesktop.org
        ReportedBy: realnc@gmail.com


(I have no idea if I filled the bug details correctly; I'm simply assuming this
is DRI related. Could be a mesa bug or xf86-video-ati problem, or whatever;
I've no idea.)

There is a regression in kernel 2.6.38 that was not there in 2.6.37: When
switching a flash video to fullscreen, three things can happen:

 * The system locks up completely (not even SysRq works)

 * The screen becomes black but the system is still
   responding (switching to a console and restarting X works)

 * The screen stops updating (old windows are still there even
   after closing them.)

There's no dmesg nor any X.org.0 output when any of the above happen.

I'm running Gentoo AMD64, kernel 2.6.38.1, x11-drivers/xf86-video-ati Git
master, mesa Git master, xorg-server 1.9.5.  My graphics card is a Radeon
HD4870.  I'm using KMS and Gallium and I'm on KDE 4.6.1 with desktop effects
enabled.

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[Bug 35697] System locks up when watching fullscreen flash video

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https://bugs.freedesktop.org/show_bug.cgi?id=35697

--- Comment #1 from Alex Deucher <agd5f@yahoo.com> 2011-03-26 09:24:51 PDT ---
Was it only the kernel that you updated?  E.g., does just booting an earlier
kernel with the same userspace drivers fix the problem?  If so, can you bisect?

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[Bug 35697] System locks up when watching fullscreen flash video

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--- Comment #2 from Nikos Chantziaras <realnc@gmail.com> 2011-03-26 09:27:46 PDT ---
(In reply to comment #1)
> Was it only the kernel that you updated?

Yes.


> E.g., does just booting an earlier kernel with the same userspace
> drivers fix the problem?

Yes. I also have 2.6.37.5 in my Grub menu. Booting that fixes those problems.


> If so, can you bisect?

Nope, sorry.  I simply don't have any free time currently for bisecting the
kernel.

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[Bug 35697] System locks up when watching fullscreen flash video

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https://bugs.freedesktop.org/show_bug.cgi?id=35697

--- Comment #3 from Nikos Chantziaras <realnc@gmail.com> 2011-03-26 09:31:30 PDT ---
Forgot to mention the Flash version I'm using:

10.2.153.1_p201011173, 64-bit.

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[Bug 35697] System locks up when watching fullscreen flash video

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--- Comment #4 from Dave Airlie <airlied@freedesktop.org> 2011-03-27 01:29:16 PDT ---
lets blame page flipping until proven otherwise for any 2.6.38 problems ;-)

Can you try disabling page flip?

Option "EnablePageFlip" "FALSE" in xorg.conf device section.

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[Bug 35697] System locks up when watching fullscreen flash video

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https://bugs.freedesktop.org/show_bug.cgi?id=35697

--- Comment #5 from Nikos Chantziaras <realnc@gmail.com> 2011-03-27 12:58:35 PDT ---
(In reply to comment #4)
> lets blame page flipping until proven otherwise for any 2.6.38 problems ;-)
> 
> Can you try disabling page flip?
> 
> Option "EnablePageFlip" "FALSE" in xorg.conf device section.

Indeed that fixed the problem completely.

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[Bug 35697] System locks up when watching fullscreen flash video

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https://bugs.freedesktop.org/show_bug.cgi?id=35697

--- Comment #6 from Alex Deucher <agd5f@yahoo.com> 2011-03-27 13:23:58 PDT ---
Created an attachment (id=44923)
 View: https://bugs.freedesktop.org/attachment.cgi?id=44923
 Review: https://bugs.freedesktop.org/review?bug=35697&attachment=44923

possible fix

Does this drm patch fix the issue?

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[Bug 35697] System locks up when watching fullscreen flash video

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--- Comment #7 from Nikos Chantziaras <realnc@gmail.com> 2011-03-27 13:41:49 PDT ---
(In reply to comment #6)
> Does this drm patch fix the issue?

Nope.

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[Bug 35697] System locks up when watching fullscreen flash video

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--- Comment #8 from Mario Kleiner <mario.kleiner@tuebingen.mpg.de> 2011-03-27 13:55:39 PDT ---
Pure guesswork, but maybe worth trying:

Can you check in your ~/.kde/share/config/kwinrc if setting the option
UnredirectFullscreen to false...

UnredirectFullscreen=false

...and restarting kwin makes any difference?

-mario

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[Bug 35697] System locks up when watching fullscreen flash video

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--- Comment #9 from Alex Deucher <agd5f@yahoo.com> 2011-03-27 13:59:16 PDT ---
Might be related to bug 35452.  You might also try the xserver patch on that
bug.

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[Bug 35697] System locks up when watching fullscreen flash video

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--- Comment #10 from Nikos Chantziaras <realnc@gmail.com> 2011-03-27 18:48:02 PDT ---
(In reply to comment #8)
> Pure guesswork, but maybe worth trying:
> 
> Can you check in your ~/.kde/share/config/kwinrc if setting the option
> UnredirectFullscreen to false...
> 
> UnredirectFullscreen=false
> 
> ...and restarting kwin makes any difference?

Yes. This also fixes the issue. Another "issue" appears though when doing this:
fullscreen animations are not smooth anymore; there's frameskipping at every
exact interval (about one second.) This is not video related though. With
compositing active, all animations, including glxgears running in a very small
window, exhibit this frameskipping.  The only way to get really even and smooth
animations is to run in fullscreen (which suspends compositing by default on
KDE.)

So I guess the issue is triggered when KDE unredirects the rendering. But it's
strange that it happens only with Flash and not other applications (KDE
unredirects them too).


(In reply to comment #9)
> Might be related to bug 35452.  You might also try the xserver patch on that
> bug.

Just tried the patch. Doesn't help.

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[Bug 35697] System locks up when watching fullscreen flash video

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--- Comment #11 from Mario Kleiner <mario.kleiner@tuebingen.mpg.de> 2011-03-27 19:18:46 PDT ---
(In reply to comment #10)
> (In reply to comment #8)
> > Pure guesswork, but maybe worth trying:
> > 
> > Can you check in your ~/.kde/share/config/kwinrc if setting the option
> > UnredirectFullscreen to false...
> > 
> > UnredirectFullscreen=false
> > 
> > ...and restarting kwin makes any difference?
> 
> Yes. This also fixes the issue. Another "issue" appears though when doing this:
> fullscreen animations are not smooth anymore; there's frameskipping at every
> exact interval (about one second.) This is not video related though. With
> compositing active, all animations, including glxgears running in a very small
> window, exhibit this frameskipping.  The only way to get really even and smooth
> animations is to run in fullscreen (which suspends compositing by default on
> KDE.)
> 
> So I guess the issue is triggered when KDE unredirects the rendering. But it's
> strange that it happens only with Flash and not other applications (KDE
> unredirects them too).
> 
> 
> (In reply to comment #9)
> > Might be related to bug 35452.  You might also try the xserver patch on that
> > bug.
> 
> Just tried the patch. Doesn't help.

If UnredirectFullscreen=false fixes the problem then it really sounds like it
is bug 35452 and that xserver patch should help. Without that patch and
unredirected rendering you should observe screen corruption in most other
fullscreen apps as well, esp. when they switch out of fullscreen mode. At least
Compiz is almost unuseable without that patch with unredirected fullscreen
windows.

The frameskipping with redirected windows is probably because the compositor
doesn't run at the same composition rate as the redraw rate of the app or the
refresh rate of the monitor.

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[Bug 35697] System locks up when watching fullscreen flash video

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--- Comment #12 from Nikos Chantziaras <realnc@gmail.com> 2011-03-27 19:28:16 PDT ---
(In reply to comment #11)
> [...]
> If UnredirectFullscreen=false fixes the problem then it really sounds like it
> is bug 35452 and that xserver patch should help. Without that patch and
> unredirected rendering you should observe screen corruption in most other
> fullscreen apps as well, esp. when they switch out of fullscreen mode. At least
> Compiz is almost unuseable without that patch with unredirected fullscreen
> windows.

This isn't the case here. There's no screen corruption whatsoever without that
patch. The problem I'm having with Flash never results in actuall screen
corruption either. It's mostly a black screen, a system freeze or the screen
just "hangs" and only the mouse is able to move. I never observe any corruption
(which I understand to mean "random garbage" on the screen.)


> The frameskipping with redirected windows is probably because the compositor
> doesn't run at the same composition rate as the redraw rate of the app or the
> refresh rate of the monitor.

I've set MaxFPS=60 in kwinrc and my monitor runs at 60Hz. I guess KWin isn't
good in keeping things synced, that's why it skips frames.

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[Bug 35697] System locks up when watching fullscreen flash video

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--- Comment #13 from Christophe Saout <christophe@saout.de> 2011-03-28 02:01:51 PDT ---
This sounds an very similar to the issue I am having. Note that I am seeing
this for quite a while now, ever since I switched to the gallium r300 driver.
First I blamed it for most of my components being bleeding-edge (kernel drm,
userspace libraries and so on). But the stuff slowly got merged into the kernel
and distributions, but the issue persists. I had high hops for the
page-flipping bug fix in 2.6.38, but it didn't fix the issue I am seeing.

Most of the time, at some point X would just stop updating the screen (sound
continues working and everything else seems to be alive). Actually, I traced it
down to compiz being unable to update the screen. Ctrl-Alt-F1 to the console,
"killall -9 compiz" and starting another non-GL window manager, the desktop is
usable just fine. (in 80% of the cases, I also had occasional total lockups,
where I had to hard reset the machine)
Most of the time, this issue is triggered by heavy screen updates.  I tend to
not run Flash full-screen, but this is the kind of screen updates that is
likely to trigger the issue. Sometimes I can go for 1 day without that type of
crash, sometimes I can get it within 30 minutes.

After killing compiz (when the issue got triggered), GL is totally unusable.
Also, while the whole desktop then fully functional, a simple glxgears would
just lock up, both via AIGLX or directly. Killing the X server resolves the
issue, but sometimes even that won't help, everything GL related seems then to
be totally locked up and only a reboot can resolve the issue.

I am also running 64 bit Gentoo and only out-of-the box software versions
(2.6.38, mesa-7.10.1) at the moment, and sane compiler flags (-O2 -march=core2)
on a Lenovo T60 (Mobility X1400, r500 family).

I haven't tried disabling page flipping or any patches yet, since I just
stumbled upon this bug report.

So, I'm not sure if this is the same or a different issue. It seems to be
something in the kernel locking up, and in most of the cases userspace is still
running, so there might be a chance to being able to debug it without resorting
to guess-work. Since the thing starte since I switched to the gallium version,
I wouldn't know how to start bisecting.

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[Bug 35697] System locks up when watching fullscreen flash video

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--- Comment #14 from Michel Dänzer <michel@daenzer.net> 2011-03-28 03:00:50 PDT ---
(In reply to comment #13)
> Actually, I traced it down to compiz being unable to update the screen.
> Ctrl-Alt-F1 to the console, "killall -9 compiz" and starting another non-GL
> window manager, the desktop is usable just fine.

That really sounds like bug 35452.

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[Bug 35697] System locks up when watching fullscreen flash video

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--- Comment #15 from Christophe Saout <christophe@saout.de> 2011-03-29 07:19:04 PDT ---
Hmm, I wouldn't have made the connection with "graphical glitches" and also I'm
not disabling redirection in fullscreen mode, but I'm still trying the attached
patch. I applied it yesterday evening and X has been running ever since. If it
stays that for the next few days I will call you my personal hero. ;) I'll come
back otherwise.

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--- Comment #16 from Alex Deucher <agd5f@yahoo.com> 2011-03-29 07:27:42 PDT ---
(In reply to comment #15)
> Hmm, I wouldn't have made the connection with "graphical glitches" and also I'm
> not disabling redirection in fullscreen mode, but I'm still trying the attached
> patch. I applied it yesterday evening and X has been running ever since. If it
> stays that for the next few days I will call you my personal hero. ;) I'll come
> back otherwise.

Just to be clear, which patch are you referring to?  The one from bug 35452 or
the one from comment 6 of this bug?

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--- Comment #17 from Christophe Saout <christophe@saout.de> 2011-03-29 08:07:17 PDT ---
I was referring to Bug 35452.  But bad news: That fix didn't make a difference,
I just experienced the same GL lockup again.  Just for completeness I'll also
apply the patch from comment 6 ind addition to see if that makes any
difference.

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--- Comment #18 from Christophe Saout <christophe@saout.de> 2011-03-29 08:26:51 PDT ---
Oh, well, that patch only concerns rs600, right?  So no point in that...

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--- Comment #19 from Alex Deucher <agd5f@yahoo.com> 2011-03-29 08:30:16 PDT ---
(In reply to comment #18)
> Oh, well, that patch only concerns rs600, right?  So no point in that...

That rs600 code is shared by r5xx-r7xx (same regs on all asics in that range),
so it applies to your card.

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--- Comment #20 from Christophe Saout <christophe@saout.de> 2011-03-29 23:43:09 PDT ---
Applied that patch to my kernel yesterday and just experienced the issue again.
Killed compiz, X went on, but GL is unusable. If I run e.g. glxgears, the
application doesn't draw anything, but is still running and seems to be waiting
for something from the X server. Closing the window results in some error "34"
IIRC (I can write down the exact error next time if it helps).

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[Bug 35697] System locks up when watching fullscreen flash video

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--- Comment #21 from Nikos Chantziaras <realnc@gmail.com> 2011-05-13 04:58:33 PDT ---
I just tried kernel 2.6.39-rc7 and with page flipping enabled, the driver hangs
with that version too.

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--- Comment #22 from Alex Deucher <agd5f@yahoo.com> 2011-06-17 09:47:55 PDT ---
Does this patch fix the issue:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=498c555f56a02ec1059bc150cde84411ba0ac010

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--- Comment #23 from Nikos Chantziaras <realnc@gmail.com> 2011-06-17 10:00:48 PDT ---
(In reply to comment #22)
> Does this patch fix the issue:
> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=498c555f56a02ec1059bc150cde84411ba0ac010

Nope.  (I applied it to 2.6.39.1.)

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--- Comment #24 from Nikos Chantziaras <realnc@gmail.com> 2011-06-17 10:40:40 PDT ---
Created an attachment (id=48109)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=48109)
config-2.6.39.1

Just in case it matters (though probably unlikely), here's my .config. It's
very minimal and only includes stuff I need, so it should build very quickly (5
minutes on a 2.7Gh Core 2 Duo.) Of course chipset and USB drivers would
probably need to change if you don't happen to run an X38-based mainboard.

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--- Comment #25 from Nikos Chantziaras <realnc@gmail.com> 2011-07-14 13:43:10 PDT ---
I just found out that this seems to happen only with the 64-bit Flash plugin,
version 10.2.159.1.  To reproduce the crash, here's the download for that Flash
version:

http://download.macromedia.com/pub/labs/flashplayer10/flashplayer10_2_p3_64bit_linux_111710.tar.gz

The new version of 64-bit Flash (11.0.something) seems to use a different
method to display video (a pretty useless method, which tears in fullscreen and
is extremely slow, making fullscreen videos unwatchable.)

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--- Comment #26 from Sérgio M. Basto <sergio@serjux.com> 2011-07-14 14:03:56 PDT ---
(In reply to comment #25)
> To reproduce the crash, here's the download for that Flash
> version:
> 
> http://download.macromedia.com/pub/labs/flashplayer10/flashplayer10_2_p3_64bit_linux_111710.tar.gz

> The new version of 64-bit Flash (11.0.something) seems to use a different
> method to display video (a pretty useless method, which tears in fullscreen and
> is extremely slow, making fullscreen videos unwatchable.)

yeah, I got this problem since November / December  , with my Intel i915,
various problems after upgrades of glibc ... I still have it ( System locks up
when watching fullscreen flash video ) , well I don't like lock ups , so I
don't test it often . 
With Fedora 14 and 15

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Nikos Chantziaras <realnc@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED

--- Comment #27 from Nikos Chantziaras <realnc@gmail.com> 2011-07-26 05:28:44 PDT ---
Something changed somewhere (no idea where), and I can't reproduce it anymore.

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