Bug 81930

Summary:

[glamor] misrendered glyphs

Product:

xorg

Reporter:

Kai <kai>

Component:

Server/Acceleration/glamor

Assignee:

Xorg Project Team <xorg-team>

Status:

RESOLVED FIXED

QA Contact:

Xorg Project Team <xorg-team>

Severity:

normal

Priority:

medium

Version:

git

Hardware:

x86-64 (AMD64)

OS:

Linux (All)

Whiteboard:

i915 platform:

i915 features:

Attachments:

Description	Flags
Latest misrendered glyph (in Firefox/Iceweasel)	none
An earlier example, first shown in bug 78453, comment #98	none
And another one.	none
Sometimes windows are misrendered as well	none

Description Kai 2014-07-30 20:27:19 UTC

Created attachment 103698 [details]
Latest misrendered glyph (in Firefox/Iceweasel)

When using the accelerated Hawaii setup, I'm seeing misrendered glyphs from time to time (see the attached files). They most often appear with Firefox (called Iceweasel in Debian), but I've also seen them within a less window (in Konsole).

My stack is (base: Debian testing):
GPU: Hawaii PRO [Radeon R9 290] (ChipID = 0x67b1)
Linux: Git:~agdf5/linux:drm-next-3.17-rebased-on-fixes:6e07731f71 (calls itself 3.16-rc6)
libdrm: Git:master/libdrm-2.4.56
LLVM: 3.5 RC1
libclc: Git:master/0ec7437d9c
Mesa: Git:master/85109bc507
DDX: 1:7.4.0-2 + Patch from http://lists.x.org/archives/xorg-driver-ati/2014-July/026517.html
X: 2:1.16.0-1 (1.16.0)

Comment 1 Kai 2014-07-30 20:31:12 UTC

Created attachment 103699 [details]
An earlier example, first shown in bug 78453, comment #98

And another example, first posted in bug 78453, comment #98.

Comment 2 Kai 2014-07-30 20:37:38 UTC

Created attachment 103700 [details]
And another one.

Comment 3 Kai 2014-07-30 20:38:26 UTC

Created attachment 103701 [details]
Sometimes windows are misrendered as well

Very rarely I see misrendered windows as well, is this related or a different bug?

Comment 4 Zoltán Böszörményi 2014-07-31 04:00:03 UTC

I see some misrendered glyphs on my Radeon R9 270X, too, in Firefox. So it's not Hawaii specific.

Comment 5 Michel Dänzer 2014-07-31 06:14:40 UTC

I think this is most likely a bug in the glamor glyph cache code.

(In reply to comment #3)
> Very rarely I see misrendered windows as well, is this related or a
> different bug?

Probably different. There is at least one existing bug report about glamor rendering issues in KDE.

Comment 6 Zoltán Böszörményi 2014-07-31 07:59:56 UTC

(In reply to comment #4)
> I see some misrendered glyphs on my Radeon R9 270X, too, in Firefox. So it's
> not Hawaii specific.

Sorry to be so terse. I am using an up to date Fedora 21 Rawhide:

$ uname -r
3.16.0-0.rc7.git1.1.fc21.x86_64

$ rpm -q xorg-x11-server-Xorg llvm-libs mesa-libGL
xorg-x11-server-Xorg-1.16.0-1.fc21.x86_64
llvm-libs-3.4-13.fc21.x86_64
llvm-libs-3.4-13.fc21.i686
mesa-libGL-10.2.3-1.20140711.fc21.x86_64
mesa-libGL-10.2.3-1.20140711.fc21.i686

(In reply to comment #5)
> I think this is most likely a bug in the glamor glyph cache code.

Probably.

Comment 7 Kai 2014-07-31 15:29:03 UTC

(In reply to comment #5)
> I think this is most likely a bug in the glamor glyph cache code.
> 
> (In reply to comment #3)
> > Very rarely I see misrendered windows as well, is this related or a
> > different bug?
> 
> Probably different. There is at least one existing bug report about glamor
> rendering issues in KDE.

Do you mean bug 80827? That's the only one I found which comes close to what I'm seeing. Though I have to admit, that some of the corruption in bug 80827 looks like the reporter has set the "compositing type" to XRender (something that never worked with GLAMOR (seen with my current R9 290 and my old HD7850).

Comment 8 Kai 2014-12-10 17:49:39 UTC

Seems to be fixed with Git commit c52a2b1eba. (which is after RC 1 of 1.17)

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