Bug 22475 - glXSwapBuffers tearing on first line of screen
Summary: glXSwapBuffers tearing on first line of screen
Status: RESOLVED FIXED
Alias: None
Product: xorg
Classification: Unclassified
Component: Driver/intel (show other bugs)
Version: git
Hardware: Other All
: medium normal
Assignee: Jesse Barnes
QA Contact: Xorg Project Team
URL:
Whiteboard:
Keywords: NEEDINFO
Depends on:
Blocks:
 
Reported: 2009-06-25 07:08 UTC by Barry Scott
Modified: 2010-02-11 09:48 UTC (History)
2 users (show)

See Also:
i915 platform:
i915 features:

Attachments
swap-buffer-composite-test.c (3.04 KB, text/plain)
2009-06-25 07:08 UTC, Barry Scott 		no flags Details
Makefile for swap-buffer-composite-test.c (131 bytes, text/plain)
2009-06-25 07:09 UTC, Barry Scott 		no flags Details
Use vblank waits for full height blits if possible (1.86 KB, patch)
2009-11-20 14:04 UTC, Jesse Barnes 		no flags Details | Splinter Review
View All

Description Barry Scott 2009-06-25 07:08:34 UTC 
Created attachment 27133 [details]
swap-buffer-composite-test.c

The attached swap-buffer-composite-test.c demonstrate that
glXSwapBuffers tears the first line of the screen.
I have tested at 1920x1200@60Hz and 1024x768@60Hz.

kernel 2.6.30
xserver 1.6.1

xf86-video-intel from git b5cd2130f97591f4a387db1b98c940c30bc6404c with
our patches posted to this list
for portrait mode and 2048x2048 XV.

Mesa from git, branch origin/mesa_7_5_branch, commit
8f382fd3f396e182255fe084bc32648b98ca1d94
Comment 1 Barry Scott 2009-06-25 07:09:30 UTC 
Created attachment 27134 [details]
Makefile for swap-buffer-composite-test.c
Comment 2 Gordon Jin 2009-06-25 19:06:32 UTC 
I assume "our patches posted to this list for portrait mode and 2048x2048 XV" is at bug#22472.
Comment 3 Barry Scott 2009-06-26 02:26:29 UTC 
Yes "out patches" are #22470, #22472, #22474.
Comment 4 Jesse Barnes 2009-07-02 16:10:08 UTC 
So is this fixed as part of your patchset, Barry?
Comment 5 Barry Scott 2009-07-03 02:13:36 UTC 
May patch sets do not have a fix for this problem.

Barry
Comment 6 Shuang He 2009-07-09 00:32:24 UTC 
I can only see left edge and right edge got some tearing. Is that the issue you addressed? I'm using mode 1680x1050      59.9*+
Comment 7 Barry Scott 2009-07-09 02:58:45 UTC 
Shuang,

You see tearing which is clearly a bug. But its not
the problem I was seeing.

I see a tear around the middle of the first line.
The rest of the screen is tear free.

Barry
Comment 8 Jesse Barnes 2009-11-20 14:04:26 UTC 
Created attachment 31358 [details] [review]
Use vblank waits for full height blits if possible

This fixes your test case for me, can you confirm?
Comment 9 Jesse Barnes 2010-02-11 09:48:26 UTC 
commit 00e7312dc45e54cd4547a943897a524639cb0b38
Author: Jesse Barnes <jbarnes@virtuousgeek.org>
Date:   Thu Feb 11 09:46:12 2010 -0800

    DRI2: handle full height blits without tearing in CopyRegion

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