Bug 62547

Summary: [SNB Bisected]Piglit glx/glx-copy-sub-buffer fail with SNA
Product: Mesa Reporter: lu hua <huax.lu>
Component: Drivers/DRI/i965Assignee: Ian Romanick <idr>
Status: VERIFIED FIXED QA Contact:
Severity: major    
Priority: high CC: blei42, xunx.fang
Version: unspecified   
Hardware: All   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:

Description lu hua 2013-03-20 06:34:34 UTC 
System Environment:
--------------------------
Arch:           i386
Platform:       Sandy bridge
Libdrm:		(master)libdrm-2.4.42-7-g36a2daad2416ad55a859c483b0d7ed93a5eff6e0
Mesa:		(master)de315f76a266ce51ca0638b9ea2ec3ccfd31f03b
Xserver:(master)xorg-server-1.14.0-36-gcc3d1a5a6120e721a46c67446ba68f5596055633
Xf86_video_intel:(master)2.21.4-31-g308f0208de59620190dd3cb65b3243d2e8a7bd87
Cairo:	(master)ff233fd706e62edf267bee66113e2cb35183bcd9
Libva:	(staging)620ab8401d2970e2a83e345ab1379ae03e1c1943
Libva_intel_driver:(staging)825c76ee544cd35cd459d86068f5301cd5319108
Kernel:	(drm-intel-nightly) 0d98e68d373eac2948d5619369f072af2e3f52d7

Bug detailed description:
-------------------------
It fails on sandy bridge with mesa master branch.It doesn't happen on 9.1 branch.
Case glean_polygonOffset also fails with same bisect commit.
Bisect shows:c07c18081e3b21070c7db3aea0c7a31a31ff20ce is the first bad commit.
commit c07c18081e3b21070c7db3aea0c7a31a31ff20ce
Author:     Philipp Brüschweiler <blei42@gmail.com>
AuthorDate: Fri Mar 8 21:32:36 2013 +0100
Commit:     Brian Paul <brianp@vmware.com>
CommitDate: Fri Mar 15 06:50:23 2013 -0600

    wayland: fix segfault when using software rendering

    wayland_roundtrip() was given an incorrect parameter.

    Fixes https://bugs.freedesktop.org/show_bug.cgi?id=62362

    Note: This is a candidate for the stable branches.

    Signed-off-by: Brian Paul <brianp@vmware.com>

output:
Probe at (0,0)
  Expected: 1.000000 0.000000 0.000000
  Observed: 0.000000 0.000000 0.000000
Probe at (25,25)
  Expected: 0.000000 1.000000 0.000000
  Observed: 0.000000 0.000000 0.000000
PIGLIT: {'result': 'fail' }

Reproduce steps:
----------------
1. xinit
2. ./bin/glx-copy-sub-buffer -auto
Comment 1 lu hua 2013-03-21 02:28:27 UTC 
It caused by SNA. Disable SNA, it pass. Sorry.
Comment 2 lu hua 2013-07-03 01:00:23 UTC 
It's a SNA bug. It fails with SNA, works well with UXA.
Comment 3 lu hua 2013-07-03 01:01:07 UTC 
It has been fixed on latest commit.
Comment 4 Chris Wilson 2013-07-03 06:39:26 UTC 
Actually it was not an SNA bug...
Comment 5 Ian Romanick 2013-07-03 19:19:06 UTC 
(In reply to comment #3)
> It has been fixed on latest commit.

So... it works with UXA and SNA, or just with UXA?

Since the bisected commit only affects EGL in Gallium, I'm suspicious that all of the information in this bug report is wrong.
Comment 6 lu hua 2013-07-04 03:22:13 UTC 
(In reply to comment #5)
> (In reply to comment #3)
> > It has been fixed on latest commit.
> 
> So... it works with UXA and SNA, or just with UXA?
> 
> Since the bisected commit only affects EGL in Gallium, I'm suspicious that
> all of the information in this bug report is wrong.

It works well with SNA and UXA on latest commit.

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