After reading this page https://downloadcenter.intel.com/product/81523
/Graphics-Drivers-for-Intel-82Q963-Graphics-and-Memory-Controller-Hub-
GMCH-, I see that latest official drivers from Intel date from august
2013.
Possible workarounds:
- Keep on using Linux and have to reboot every few hours
David Pérez, as this report is closed, if you have a bug please file a new
report via a terminal:
ubuntu-bug xorg
Please ensure you have the package xdiagnose installed, and that you
click the Yes button for attaching additional debugging information.
Also, please feel free to subscribe me to
I've found a relevant document about our bug:
There are a couple of backends available for accelerating the DDX. "UXA"
(Unified Acceleration Architecture) is the mature backend that was
introduced to support the GEM driver model. It is in the process of
being superseded by "SNA" (Sandybridge's
I'm experiencing also this nasty bug:
$ lspci|grep -i graphic
00:02.0 VGA compatible controller: Intel Corporation 82Q963/Q965 Integrated
Graphics Controller (rev 02)
00:02.1 Display controller: Intel Corporation 82Q963/Q965 Integrated Graphics
Controller (rev 02)
After reading your technical
I opened Bug #1314551 for the current AMD version of this behaviour and
subscribed Christopher to it.
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Title:
*** Bug 76804 has been marked as a duplicate of this bug. ***
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Title:
[gen4 sna] Font corruption
Status in
Created attachment 96026
GTK+2 fonts corruption
as per git, the commit is applied for the version 2.99.910. I have this version
installed.
But the problem is still there, see the screenshot. Interestingly, the fonts
are heavily corrupted in GTK+2 apps. QT/efl apps are fine. GTK+3 apps mainly
(In reply to comment #184)
Created attachment 96026 [details]
GTK+2 fonts corruption
as per git, the commit is applied for the version 2.99.910. I have this
version installed.
But the problem is still there, see the screenshot. Interestingly, the fonts
are heavily corrupted in GTK+2 apps.
Created attachment 96027
Xorg.log
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Title:
[gen4 sna] Font corruption
Status in X.org xf86-video-intel:
In
Ah, would you happen to have an uneven amount of memory installed?
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Title:
[gen4 sna] Font corruption
Status
(In reply to comment #187)
Ah, would you happen to have an uneven amount of memory installed?
I too have an uneven amount of memory installed (7 GiB). It's an old
workhorse for office usage only, so dual-channel doesn't matter.
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(In reply to comment #187)
Ah, would you happen to have an uneven amount of memory installed?
Probably. Is this and unsupported configuration?
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(In reply to comment #188)
(In reply to comment #187)
Ah, would you happen to have an uneven amount of memory installed?
Probably. Is this and unsupported configuration?
We have a known issue in that we don't detect the swizzling correctly
and so we may end up with corruption if objects are
true. Thanks a lot, Chris!
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Title:
[gen4 sna] Font corruption
Status in X.org xf86-video-intel:
In Progress
Jmadero, thank you for your comment. So your hardware and problem may be
tracked, could you please file a new report by executing the following in a
terminal:
ubuntu-bug xorg
Please ensure you have xdiagnose installed, and that you click the Yes
button for attaching additional debugging
I still have the same issue - not sure if it's made it into 13.10
repositories
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Title:
[gen4 sna] Font
Nevertheless it was a good catch.
commit 1cbc59a917e7352fc68aa0e26b1575cbd0ceab0d
Author: Edward Sheldrake ejsheldr...@gmail.com
Date: Mon Feb 3 09:34:33 2014 +
sna/gen4,5: Fix setting pipe control cache flush bits
Cache flush bits are on dword 0, not 1, on gen4 and gen5. Also
Sigh.
Probably,
diff --git a/src/sna/gen4_render.c b/src/sna/gen4_render.c
index 1580707..ba9c9bc 100644
--- a/src/sna/gen4_render.c
+++ b/src/sna/gen4_render.c
@@ -602,6 +602,7 @@ gen4_emit_pipe_break(struct sna *sna)
inline static void
gen4_emit_pipe_invalidate(struct sna *sna)
{
+#if 0
Created attachment 93326
icon corruption
Latest git (2.99.909-7-g1cbc59a) has icon corruption, but all text is
fine.
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Running with all workarounds disabled, this change doesn't fix anything nor
seem to make any difference, but anyway:
Shouldn't the cache flush bits be in dword 0 for gen4 GEN4_PIPE_CONTROL? Maybe
gen5 also?
diff --git a/src/sna/gen4_render.c b/src/sna/gen4_render.c
index 1d164b6..894418b 100644
I am having ATI video card. The problem still persists. Any idea on
this?
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Title:
[gen4 sna] Font corruption
Pushed the flushes once again. Hopefully we are corruption free once
more.
commit fc001615ff78df4dab6ee0d5dd966b723326c358
Author: Chris Wilson ch...@chris-wilson.co.uk
Date: Tue Feb 4 10:36:21 2014 +
sna/gen4: Disable use of pipecontrol invalidates again
One day, just not
(In reply to comment #181)
Without #181 patch I had flickering like:
http://ixion.pld-linux.org/~arekm/intel-flicker.mov
(best viewed from local fs)
With the patch flickering is gone.
GM45 - synonym for all bad words :/
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Created attachment 93235
sna/gen4,5: Fix setting pipe control cache flush bits
Only the one in gen4_emit_pipe_flush is in an enabled part of the code
anyway.
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I'm keeping the upstream bug open to see if we can fix the performance
implications of the workaround. But as far as the corruption is
concerned, the fix has been release (and packaged by Ubuntu).
** Changed in: xserver-xorg-video-intel (Ubuntu)
Status: Incomplete = Fix Released
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I was expirening this bug in Ubuntu 13.10, but I've been running the
14.04 alpha for a few weeks now and haven't noticed it recently at all.
uname -a
Linux sidekick 3.13.0-6-generic #23-Ubuntu SMP Thu Jan 30 09:48:03 UTC 2014
x86_64 x86_64 x86_64 GNU/Linux
I'll report back here if it comes
(In reply to comment #175)
Created attachment 92770 [details]
not quite random corruption example
With the workarounds disabled, can anything be deduced from the text or
pixmap corruption not seeming to be completely random?
It's not entirely random. What I have noticed is that one or more
Created attachment 92770
not quite random corruption example
With the workarounds disabled, can anything be deduced from the text or
pixmap corruption not seeming to be completely random?
Italic text seems to be particularly badly hit, and it seems to vary
with the font and size. But in the
Created attachment 92240
Text with errors
Recently I'm noticing somewhat more 'weird' behavior - it might be
related to my temporal usage of night releases of Mozilla (since rawhide
version got somewhat broken)
What is weird in this image is - the text was badly rendered AND it
remained visible
I've not yet tested patch from comment 165 - but with regards to Firefox
and Cairo - I'm also seeing errors in i.e. pidgin - where status icons
looks occasionally damaged.
And my rawhide has these related packages:
cairo-1.13.1-0.1.git337ab1f.fc21.x86_64
The image corruptions are also visible on the file/folder icons in
thunar. I still have no glyph corruptions any more.
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ok - while doing a very quick light check - at least on Firefox input
window I do not observe any rendering bugs (which have been pretty
simple to reach before).
(Lenovo T61 + git + patch from comment 168)
Thought the performance decrease is noticeable and also the setting for
MAX_FLUSH...
I am wondering if some extra flushes are needed in regard to what the
G45 PRM PDFs say about the BLT (section 8.6, vol 1b p. 170)
git + this gives only a moderate amount of corrupt rendering:
diff --git a/src/sna/gen4_render.c b/src/sna/gen4_render.c
index e239c21..f150e5b 100644
---
Created attachment 92287
Always force a GPU flush between operations
Can you please try this patch against git and see if that improves
things - except for performance?
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(In reply to comment #168)
Created attachment 92287 [details] [review]
Always force a GPU flush between operations
Can you please try this patch against git and see if that improves things -
except for performance?
Current git (2.99.907-23-gf23ab96) without any other changes: still a
few
Update after some new commits:
4c7b183fd21b461f9f18662c3b9d9732b6bef13d + Always patch - now gives me
broken text lines in Thunderbird window.
And it's now enough just to move the mouse over text and the text is
changing and actually never renders correctly some letters.
Checking back
Created attachment 92288
bug
f23ab963c4f4ada2051588dfc85264aa2798dbf7 + that patch and I'm seeing
corruption. Using google-chrome and letters in url bar or window title
bar sometimes get corrupted and then get fixed.
Also seeing the problem in gimp menus. Some letters get corrupted and
fixed.
Ok - seem(In reply to comment #170)
Created attachment 92288 [details]
bug
f23ab963c4f4ada2051588dfc85264aa2798dbf7 + that patch and I'm seeing
corruption. Using google-chrome and letters in url bar or window title bar
sometimes get corrupted and then get fixed.
Also seeing the problem
Created attachment 92512
Always force a GPU flush between operations
Updated always flush patch that passes Arkadiusz's stress test.
* sobs
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This happens with me in Firefox in Ubuntu 13.10.
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Title:
[gen4 sna] Font corruption
Status in X.org
Anirban Ghosh, thank you for your comment. So your hardware and problem may be
tracked, could you please file a new report by executing the following in a
terminal:
ubuntu-bug xorg
For more on this, please see the official Ubuntu documentation:
Ubuntu X.Org Team, Ubuntu Bug Control, and Ubuntu
(In reply to comment #160)
Typical, it appeared stable through my firefox testing, but if you try
reverting b7565a26401e283df94b68019e8093f8104428f4, I expect the corruptions
to disappear again.
Yep - correct revert of this commit make MAX_VERTEX 1 again producing
correct rendering - even
I have updated to current git and reverted commit
b7565a26401e283df94b68019e8093f8104428f4 and left the MAX_FLUSH_VERTICES
set to 1, but now instead of glyph corruption I notice some icons are
corrupted similar to the glyphs before.
Example: In thunderbird, I hover over a toolbar icon and when
After updating to current git, the situation has become worse and I now
see more visible corruptions even with MAX_FLUSH_VERTICES=1. And I did
not have to wait some hours for them to appear as before, they are
visible right after starting X.
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Typical, it appeared stable through my firefox testing, but if you try
reverting b7565a26401e283df94b68019e8093f8104428f4, I expect the
corruptions to disappear again.
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I have been experimenting with various numbers in the code in comment
#157 without really discovering anything useful. I think any change that
slows things down decreases the chances of observing any corruption, but
might not necessarily fix the problem completely.
With current git +
** Tags added: trusty
** Changed in: xserver-xorg-video-intel (Ubuntu)
Status: Incomplete = Confirmed
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Thaddäus Tintenfisch, please allow the original reporter to perform the
requested action, so his logs may be collected.
Thank you for your understanding.
** Changed in: xserver-xorg-video-intel (Ubuntu)
Status: Confirmed = Incomplete
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I think nice illustration could be - that while before with MAX 9 it
seemed like i.e. gnome-terminal running top was not really rendering
broken characters - it now seems to show a lot of messed characters.
On the other hand - MAX 1 seems to be now more fluent then before - so
except for some
(In reply to comment #145)
Created attachment 91383 [details]
gedit in openbox with 2.99.907 GM45 SNA
I am finding that GM45 SNA seems unusable with 2.99.907 - git bisect pointed
to the bad commit as:
9289e2c56b7f0cc78c5123691ad96611f0e04bed is the first bad commit
commit
(In reply to comment #153)
(In reply to comment #145)
Created attachment 91383 [details]
gedit in openbox with 2.99.907 GM45 SNA
I am finding that GM45 SNA seems unusable with 2.99.907 - git bisect pointed
to the bad commit as:
9289e2c56b7f0cc78c5123691ad96611f0e04bed is the first
Something worth experimenting with is detuning the GPU, e.g.:
diff --git a/src/sna/gen4_render.c b/src/sna/gen4_render.c
index e239c21..bc6af68 100644
--- a/src/sna/gen4_render.c
+++ b/src/sna/gen4_render.c
@@ -52,7 +52,7 @@
*/
#define FORCE_SPANS 0
#define FORCE_NONRECTILINEAR_SPANS -1
Created attachment 91613
Grabbed snapshot with patch from comment 157
As could be seen - yes - with little effort I'm able to capture broken
characters with given patch compiled in.
The only needed thing is to start to edit the dialog in the Firefox and
start to add/remove random characters over
The bug occurs with MAX_FLUSH_VERTICES = 2 too, both in firefox and
xterm, so unfortunately setting it to 1 seems to be the only solution
here.
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bad news - now I'm in fact able to spot badly rendered characters in
Firefox also with MAX 1
So something went wrong
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** Bug watch added: freedesktop.org Bugzilla #73348
https://bugs.freedesktop.org/show_bug.cgi?id=73348
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Title:
Jonathan Thomas, this bug was reported a while ago and there hasn't been
any activity in it recently. We were wondering if this is still an
issue? If so, could you please test for this with the latest development
release of Ubuntu? ISO images are available from
Here's another bug report regarding this same issue:
https://bugs.launchpad.net/bugs/1227569
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Title:
[gen4 sna]
(In reply to comment #145)
[ 1702.349954] [drm] stuck on render ring
[ 1702.349966] [drm] capturing error event; look for more information in
/sys/class/drm/card0/error
[ 1702.354334] [drm:i915_set_reset_status] *ERROR* render ring hung inside
bo (0x32a1000 ctx 0) at 0x32a1110
Attach the
Created attachment 91383
gedit in openbox with 2.99.907 GM45 SNA
I am finding that GM45 SNA seems unusable with 2.99.907 - git bisect pointed to
the bad commit as:
9289e2c56b7f0cc78c5123691ad96611f0e04bed is the first bad commit
commit 9289e2c56b7f0cc78c5123691ad96611f0e04bed
Author: Chris
Created attachment 91388
intel_error_decode output
I saved the output from intel_error_decode but I didn't save the raw
error data.
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(In reply to comment #148)
Worth trying just:
diff --git a/src/sna/gen4_render.c b/src/sna/gen4_render.c
index 637137e..dc80de3 100644
--- a/src/sna/gen4_render.c
+++ b/src/sna/gen4_render.c
@@ -660,9 +660,11 @@ inline static int gen4_get_rectangles(struct sna *sna,
if
Worth trying just:
diff --git a/src/sna/gen4_render.c b/src/sna/gen4_render.c
index 637137e..dc80de3 100644
--- a/src/sna/gen4_render.c
+++ b/src/sna/gen4_render.c
@@ -660,9 +660,11 @@ inline static int gen4_get_rectangles(struct sna *sna,
if (rem = 0) {
if
Created attachment 91389
intel_error_decode output
the decoded error that occurred while running gtkperf, 2.99.907 with the
change in comment #148
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(In reply to comment #149)
But I didn't spot any corrupted characters while running 2.99.907 with
MAX_FLUSH_VERTICES set back to 6
And now I have spotted the single character corruption with 2.99.907 +
MAX_FLUSH_VERTICES set to 6.
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All tests with MAX_FLUSH_VERTICES greater than 2 reveal those single
garbled glyphs. I'm still testing with a value of 2. There isn't much
noticeable difference between 3, 4, 5.
00:02.0 VGA compatible controller: Intel Corporation 4 Series Chipset
Integrated Graphics Controller (rev 03) (prog-if
*** Bug 71773 has been marked as a duplicate of this bug. ***
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Title:
[gen4 sna] Font corruption
Status in
(In reply to comment #134)
(In reply to comment #132)
I don't want to speak too soon but it seems that the latest patch fixes the
problem.
Let it run for a day or so to be sure. The other thing that is worth
checking is whether setting MAX_FLUSH_VERTICES to 2 is also stable, or 4
etc.
For me #define MAX_FLUSH_VERTICES 1 fixes the issue. #define
MAX_FLUSH_VERTICES 2 is also stable so far. Values starting from 3
result in artifacts.
However, as I wrote in post #150, reverting this:
diff --git a/src/sna/sna_glyphs.c b/src/sna/sna_glyphs.c
index 62415c8..43086a0 100644
---
Nope. The behaviour of this bug is very well characterised by the above
analysis.
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Title:
[gen4 sna] Font
I don't want to speak too soon but it seems that the latest patch fixes
the problem.
First I've tried the latest git version and it didn't help, I've noticed
corrupted fonts as soon as I logged on and start poking things in
terminal.
After I've applied the patch in comment #129 and restarted, no
(In reply to comment #132)
I don't want to speak too soon but it seems that the latest patch fixes the
problem.
Let it run for a day or so to be sure. The other thing that is worth
checking is whether setting MAX_FLUSH_VERTICES to 2 is also stable, or 4
etc. Setting it to 1 has a major impact
Maybe this bug could be more easily tracked down when the amount of
vertices is actually much higher - since in this case it seems to crash
almost immediatelly.
I understand there is some 'maximum queue' size GPU could handle - but
the engine should be able to track size of all commands and not
The issue that the VUE (which is a memory slot used by the GPU for a
vertex entry) are reused by a second thread before the first thread is
complete, causing the first thread to generate invalid texture
coordinates and corrupt rendering. That is a hardware read-write hazard
bug (or at least I have
Well I'm curious how this explains this - I've taken current git -
changed the value to '44' - and I'm typing this text. I could see a lot of
errors during text typing - but these errors seems to be somehow limited only
to certain regions of shown text.
It's not destroyed everywhere - only in
Just to report, maybe this isn't intel driver bug at all. At home I have
ATI R270X (radeonsi driver) and Intel HD2000, at work X4500 and I get
hit by this bug on all of them.
Small, single char, graphic corruption, easily triggered by scrolling
through a window with lots of small text (tailing a
(In reply to comment #136)
The issue that the VUE (which is a memory slot used by the GPU for a vertex
entry) are reused by a second thread before the first thread is complete,
causing the first thread to generate invalid texture coordinates and corrupt
rendering. That is a hardware read-write
Just to add some more comment on MAX_FLUSH_VERTICES - when set to valu
96 - it gives the highest throughput on x11perf -aa10text 3.7MChar/s -
using any higher value doesn't make any different (so the max seems to
be somewhere between 64-96]
Also when this 3.7MChar is rendered - the parallel
Created attachment 90707
/dev/shm corruption
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Title:
[gen4 sna] Font corruption
Status in X.org
(In reply to comment #132)
Chris, any thoughts on why is this happening with radeon opensource driver
also ?
I was hoping that it would be a bug in common component, but in this
case it sounds like they have a similar bug in managing internal GPU
state.
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As a check that all problems are the same, can people who are still
affected by this do a test with
diff --git a/src/sna/gen4_render.c b/src/sna/gen4_render.c
index a87af39..86c37d6 100644
--- a/src/sna/gen4_render.c
+++ b/src/sna/gen4_render.c
@@ -63,7 +63,7 @@
#define NO_FILL_BOXES 0
#define
With kernel-3.12.2 and current git, the situation now is much better.
The corruptions happen less often (still often enough to be noticed
though), and are usually confined to single characters, or only parts of
single characters. While I'm writing this, I can notice what appears to
be some slight
Gents,
I've spent some time bisecting the xf86-video-intel to track down the issue. So
far my conclusion is as follows: the issue was introduced in this commit -
http://cgit.freedesktop.org/xorg/driver/xf86-video-intel/commit/?id=2a59eadf8165bd70780ac16220456c6196ac3ff1
Reverting the changes in
I just noticed that when I visit the web page
http://www.thomann.de/se/thomann_dp25.htm and play a music sample
from that page something happens with the text on the screen. Characters are
distorted and back synchronized with the music.
The error pops around on the screen seemingly in random.
SNA has grown worse now. Since about six weeks, I've started to see
corruption in the terminal (cursor not disappearing or not showing at
all, more text missing until marking with the mouse,...). I've switched
to UXA, nothing bad visible there.
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Well here is just another one -
$ ./basic-copyarea
Opened connection to :0 for testing.
Testing setting of single pixels (root): passed [1 iterations x 4096]
Testing area sets (root): passed [1 iterations x 4096]
Testing area fills (root, using pixmap source): passed [1 iterations x 4096]
Testing
My experiments so far indicate that the errors only happen with
rendering to the uncached frontbuffer, are not influenced by the number
of rectangles in each primitive (though the failure does occur at
different frequencies) and do not respond to adding extra MI_FLUSH. I
don't think attaching
The tests are intentionally overkill - they are also intended to try and
test handling of large batches, as well as generally stress the system.
I hadn't noticed the basic-copyarea fail. That does look to be
different. So far, the failure pattern had seemed to be a subspan
doesn't get written
Here's some insight: test/render-copyarea is just a mirth of fail on my
gm45.
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Title:
[gen4 sna] Font
Well I could add here output of some tests:
i.e.:
$ ./render-composite-solid
Opened connection to :0 for testing.
Testing setting of single pixels (root): passed [1 iterations x 4096]
Testing area sets (root): passed [1 iterations x 4096]
Testing area fills (root): passed [1 iterations x 4096]
** Summary changed:
- [gen4 sna] Font corruption in Chromium tab bar
+ [gen4 sna] Font corruption
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Title:
** Tags added: saucy
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Title:
[gen4 sna] Font corruption in Chromium tab bar
Status in X.org xf86-video-intel:
*** Bug 68596 has been marked as a duplicate of this bug. ***
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https://bugs.launchpad.net/bugs/1098334
Title:
[gen4 sna] Font corruption in Chromium
It has been a long long time I am following this bug.
So, I built the 3.10.3 plain vanilla kernel, which went stable as of
today (Friday, July 26, 2013) and I can say that my crappy GM45 chip
works fine with the dreaded test.odg resizing test. Seems like things
are improving.
and if it is of
*** Bug 67377 has been marked as a duplicate of this bug. ***
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https://bugs.launchpad.net/bugs/1098334
Title:
[gen4 sna] Font corruption in Chromium
Notice how with Chromium/Chrome the corruption happens only on display
positions where the fade out effect is applied to the right side of the
tab.
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Created attachment 82789
Character i of word application and p of bpp=8 is corrupted
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https://bugs.launchpad.net/bugs/1098334
Title:
[gen4 sna] Font
Added 'characters' to the bug title.
I believe that this is now the major issue related with this bug and
having 'character' in the title may help people having issues look here.
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Created attachment 82787
Character m of the word parameters is corrupted
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https://bugs.launchpad.net/bugs/1098334
Title:
[gen4 sna] Font corruption in
I'm also affected by this character corruption bug. My hardware is a
notebook with Intel 4500M (i915 driver). First I thought it's caused by
a hardware issue with my external screen, but the notebook screen shows
the currupted characters as well. Sometimes when I scroll down to the
end of a
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