* [Bug 54877] New: [bisected] rendering corrupted for windows larger than 2048 pixels in one dimension
@ 2012-09-13 15:36 bugzilla-daemon
2012-09-13 16:27 ` [Bug 54877] " bugzilla-daemon
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: bugzilla-daemon @ 2012-09-13 15:36 UTC (permalink / raw)
To: dri-devel
https://bugs.freedesktop.org/show_bug.cgi?id=54877
Bug #: 54877
Summary: [bisected] rendering corrupted for windows larger than
2048 pixels in one dimension
Classification: Unclassified
Product: Mesa
Version: git
Platform: Other
OS/Version: All
Status: NEW
Severity: normal
Priority: medium
Component: Drivers/DRI/R600
AssignedTo: dri-devel@lists.freedesktop.org
ReportedBy: niels_ole@salscheider-online.de
I have a Radeon HD 6870 under Linux 3.6.0-rc5.
Since commit f44bda17f515c411071ca8744ebd96039d9c583b, the output of OpenGL
applications is corrupted if the window is larger than 2048 pixels in at least
one dimension.
All parts of the image with a coordinate larger than 2047 show garbage while
the textures seem to be shifted for the remaining parts of the image.
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* [Bug 54877] [bisected] rendering corrupted for windows larger than 2048 pixels in one dimension
2012-09-13 15:36 [Bug 54877] New: [bisected] rendering corrupted for windows larger than 2048 pixels in one dimension bugzilla-daemon
@ 2012-09-13 16:27 ` bugzilla-daemon
2012-09-13 21:30 ` bugzilla-daemon
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: bugzilla-daemon @ 2012-09-13 16:27 UTC (permalink / raw)
To: dri-devel
https://bugs.freedesktop.org/show_bug.cgi?id=54877
Andreas Boll <andreas.boll.dev@gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ptpzz@yandex.ru
Component|Drivers/DRI/R600 |Drivers/Gallium/r600
--- Comment #1 from Andreas Boll <andreas.boll.dev@gmail.com> 2012-09-13 16:27:30 UTC ---
Cc Vadim
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* [Bug 54877] [bisected] rendering corrupted for windows larger than 2048 pixels in one dimension
2012-09-13 15:36 [Bug 54877] New: [bisected] rendering corrupted for windows larger than 2048 pixels in one dimension bugzilla-daemon
2012-09-13 16:27 ` [Bug 54877] " bugzilla-daemon
@ 2012-09-13 21:30 ` bugzilla-daemon
2012-09-14 6:35 ` bugzilla-daemon
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: bugzilla-daemon @ 2012-09-13 21:30 UTC (permalink / raw)
To: dri-devel
https://bugs.freedesktop.org/show_bug.cgi?id=54877
--- Comment #2 from Alex Deucher <agd5f@yahoo.com> 2012-09-13 21:30:33 UTC ---
Created attachment 67121
--> https://bugs.freedesktop.org/attachment.cgi?id=67121
fix
This fixes it. I need to find out how the quant mode affects the range of
values.
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* [Bug 54877] [bisected] rendering corrupted for windows larger than 2048 pixels in one dimension
2012-09-13 15:36 [Bug 54877] New: [bisected] rendering corrupted for windows larger than 2048 pixels in one dimension bugzilla-daemon
2012-09-13 16:27 ` [Bug 54877] " bugzilla-daemon
2012-09-13 21:30 ` bugzilla-daemon
@ 2012-09-14 6:35 ` bugzilla-daemon
2012-09-14 13:47 ` bugzilla-daemon
2019-09-18 19:00 ` bugzilla-daemon
4 siblings, 0 replies; 6+ messages in thread
From: bugzilla-daemon @ 2012-09-14 6:35 UTC (permalink / raw)
To: dri-devel
https://bugs.freedesktop.org/show_bug.cgi?id=54877
--- Comment #3 from Vadim Girlin <ptpzz@yandex.ru> 2012-09-14 06:35:08 UTC ---
(In reply to comment #2)
> Created attachment 67121 [details] [review]
> fix
>
> This fixes it. I need to find out how the quant mode affects the range of
> values.
My guess is that QUANT_MODE determines the position of fixed point for internal
calculations in hw. Quantization precision 1/4096 means 12 bits, and it looks
like we have 11 bits before the point in that case, with 23 bits total. So if
we need to increase the range, we have to move the point lowering the
precision.
I've tried 1/256 and other values on evergreen for initial implementation of
that patch in hope that it'll be enough, but IIRC 1/4096 fixed more tests
(though possibly some test results were simply random). If some tests are
really failing due to lower precision, I guess we might want to adjust
QUANT_MODE dynamically.
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* [Bug 54877] [bisected] rendering corrupted for windows larger than 2048 pixels in one dimension
2012-09-13 15:36 [Bug 54877] New: [bisected] rendering corrupted for windows larger than 2048 pixels in one dimension bugzilla-daemon
` (2 preceding siblings ...)
2012-09-14 6:35 ` bugzilla-daemon
@ 2012-09-14 13:47 ` bugzilla-daemon
2019-09-18 19:00 ` bugzilla-daemon
4 siblings, 0 replies; 6+ messages in thread
From: bugzilla-daemon @ 2012-09-14 13:47 UTC (permalink / raw)
To: dri-devel
https://bugs.freedesktop.org/show_bug.cgi?id=54877
--- Comment #4 from Alex Deucher <agd5f@yahoo.com> 2012-09-14 13:47:19 UTC ---
(In reply to comment #3)
> (In reply to comment #2)
> > Created attachment 67121 [details] [review] [review]
> > fix
> >
> > This fixes it. I need to find out how the quant mode affects the range of
> > values.
>
> My guess is that QUANT_MODE determines the position of fixed point for internal
> calculations in hw. Quantization precision 1/4096 means 12 bits, and it looks
> like we have 11 bits before the point in that case, with 23 bits total. So if
> we need to increase the range, we have to move the point lowering the
> precision.
>
> I've tried 1/256 and other values on evergreen for initial implementation of
> that patch in hope that it'll be enough, but IIRC 1/4096 fixed more tests
> (though possibly some test results were simply random). If some tests are
> really failing due to lower precision, I guess we might want to adjust
> QUANT_MODE dynamically.
That makes sense. The hw worked similarly on r300-r500. We should adjust the
mode based on the size of the buffer I suppose.
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^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug 54877] [bisected] rendering corrupted for windows larger than 2048 pixels in one dimension
2012-09-13 15:36 [Bug 54877] New: [bisected] rendering corrupted for windows larger than 2048 pixels in one dimension bugzilla-daemon
` (3 preceding siblings ...)
2012-09-14 13:47 ` bugzilla-daemon
@ 2019-09-18 19:00 ` bugzilla-daemon
4 siblings, 0 replies; 6+ messages in thread
From: bugzilla-daemon @ 2019-09-18 19:00 UTC (permalink / raw)
To: dri-devel
[-- Attachment #1.1: Type: text/plain, Size: 840 bytes --]
https://bugs.freedesktop.org/show_bug.cgi?id=54877
GitLab Migration User <gitlab-migration@fdo.invalid> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |MOVED
--- Comment #5 from GitLab Migration User <gitlab-migration@fdo.invalid> ---
-- GitLab Migration Automatic Message --
This bug has been migrated to freedesktop.org's GitLab instance and has been
closed from further activity.
You can subscribe and participate further through the new bug through this link
to our GitLab instance: https://gitlab.freedesktop.org/mesa/mesa/issues/418.
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