Bug 36600

Summary:	i915 classic -- screen fails to update in apps
Product:	Mesa	Reporter:	col
Component:	Drivers/DRI/i915	Assignee:	Ian Romanick <idr>
Status:	RESOLVED FIXED	QA Contact:
Severity:	normal
Priority:	medium	CC:	idr, kenneth
Version:	git	Keywords:	NEEDINFO
Hardware:	All
OS:	All
Whiteboard:
i915 platform:		i915 features:

Description col 2011-04-25 19:28:00 UTC

Since roughly March, I've had problems with text display not being updated until the main window is clicked with a mouse. Examples:

Claws mail message list, deleting several messages leaves corruptions
http://evolone.com/pics/screen-corruption.png


gnome-terminal su login doesn't update with root prompt
http://evolone.com/pics/screen-corruption-term.png

At this point, I updated every library, but it seems an under-reported regression. I use gnome-shell, have for many months, no problems till recently. 

00:02.0 VGA compatible controller: Intel Corporation Mobile 915GM/GMS/910GML Express Graphics Controller (rev 03) (prog-if 00 [VGA controller])
	Subsystem: Dell Device 0188
	Flags: bus master, fast devsel, latency 0, IRQ 16
	Memory at dff00000 (32-bit, non-prefetchable) [size=512K]
	I/O ports at ec38 [size=8]
	Memory at c0000000 (32-bit, prefetchable) [size=256M]
	Memory at dfec0000 (32-bit, non-prefetchable) [size=256K]
	Expansion ROM at <unassigned> [disabled]
	Capabilities: [d0] Power Management version 2
	Kernel driver in use: i915


OpenGL renderer string: Mesa DRI Intel(R) 915GM x86/MMX/SSE2
OpenGL version string: 1.4 Mesa 7.11-devel (git-f274dfa)
direct rendering: Yes

i915 (Intel 915, 945)
  [1]   classic *
  [2]   gallium

NOTE: Switching this to 'gallium' makes the text corruption go away, losing gnome-3 goodness.

Comment 1 Ian Romanick 2011-04-25 22:23:51 UTC

Since you know approximately when it worked, can you bisect?

Ken has also been running gnome3, so he might be able to bisect it too.

Comment 2 col 2011-04-26 10:54:55 UTC

(In reply to comment #1)
> Since you know approximately when it worked, can you bisect?
> 
> Ken has also been running gnome3, so he might be able to bisect it too.

I'm working on it. I don't "know" anyone here, so if Ken is watching, maybe he can reproduce the bug on his hardware too?

Anyway, knowing nothing much about git bisecting I'm trying with little success. It would seem there are too many changes for my system to go back that far. I'd have to start with a re-installation... really not what I want to do. Anyway, I'll see if this one 3370f9b606217f53297d61b025a06f7bcf62648a builds and works, or if it fixes the bug. Rinse and repeat?

I *think* the problem started for me when 7.10.1 hit me, up from 7.9.1, but I rebuilt other libraries, not suspecting a bug in mesa. Now, I can't seem to use my desktop when mesa is so old (without possibly rebuilding other libraries). Maybe somewhere in between I'll get lucky. IDK... seems really like a long-shot as I have to test this in a working desktop.

Comment 3 col 2011-04-26 18:40:02 UTC

(In reply to comment #2)
> (In reply to comment #1)
> > Since you know approximately when it worked, can you bisect?
> > 
> > Ken has also been running gnome3, so he might be able to bisect it too.
> 
> I'm working on it. I don't "know" anyone here, so if Ken is watching, maybe he
> can reproduce the bug on his hardware too?
> 

Okay... I tried every version released/packaged by gentoo in succession back to 7.9.1. No change. Finally reverted git versions of gnome-shell, mutter, clutter, etc., to packaged releases. Problem went away.

Sorry for the noise. I'll see if I can reproduce the problem via upgrades, and probably close this.

Comment 4 col 2011-04-26 20:40:30 UTC

(In reply to comment #3)
> (In reply to comment #2)
> > (In reply to comment #1)
> > > Since you know approximately when it worked, can you bisect?
> > > 
> > > Ken has also been running gnome3, so he might be able to bisect it too.
> > 
> > I'm working on it. I don't "know" anyone here, so if Ken is watching, maybe he
> > can reproduce the bug on his hardware too?
> > 
> 
> Okay... I tried every version released/packaged by gentoo in succession back to
> 7.9.1. No change. Finally reverted git versions of gnome-shell, mutter,
> clutter, etc., to packaged releases. Problem went away.
> 
> Sorry for the noise. I'll see if I can reproduce the problem via upgrades, and
> probably close this.

OK, some progress. I thought the problem was disappeared, but it returned between 7.9.1 and updating to 7.9.2. I suppose I might try to find out exactly where, then.

Comment 5 col 2011-04-27 15:58:28 UTC

(In reply to comment #4)
> (In reply to comment #3)
> > (In reply to comment #2)
> > > (In reply to comment #1)
> > > > Since you know approximately when it worked, can you bisect?
[8<]
> > 
> > Sorry for the noise. I'll see if I can reproduce the problem via upgrades, and
> > probably close this.
> 
> OK, some progress. I thought the problem was disappeared, but it returned
> between 7.9.1 and updating to 7.9.2. I suppose I might try to find out exactly
> where, then.

Right, I can't be any help here. Seeing redraw problems with 7.10.2, but not the same severity...

My guess is there is a bug, just some combinations (of x server, WM) show it more than others. But, I can't reproduce the same bug anymore. Now I get, so far, only some artifacts in scrolling text -- this I can live with for now.

Close this?

Comment 6 Eric Anholt 2011-06-01 10:49:37 UTC

I'd say if your initial problem is gone, close it.  Note that these sorts of failure-to-update-with-compositing-wm bugs are generally things that are bugs in the 2D driver (xf86-video-intel) and the server, as opposed to Mesa, so you might look there for where the regression was for your remaining issue.

Comment 7 Kenneth Graunke 2011-08-11 00:21:12 UTC

Closing as that seems to be the general consensus.

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