* [Bug 76998] hang on CEDAR right after log on
[not found] <bug-76998-502@http.bugs.freedesktop.org/>
@ 2014-04-03 20:04 ` bugzilla-daemon
2014-04-04 11:43 ` bugzilla-daemon
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https://bugs.freedesktop.org/show_bug.cgi?id=76998
Alex Deucher <agd5f@yahoo.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Assignee|xorg-driver-ati@lists.x.org |dri-devel@lists.freedesktop
| |.org
QA Contact|xorg-team@lists.x.org |
Product|xorg |DRI
Component|Driver/Radeon |DRM/Radeon
--- Comment #1 from Alex Deucher <agd5f@yahoo.com> ---
please attach your xorg log and dmesg output. Can you use git to bisect the
kernel and find out what commit caused the regression?
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2014-04-03 20:04 ` [Bug 76998] hang on CEDAR right after log on bugzilla-daemon
@ 2014-04-04 11:43 ` bugzilla-daemon
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https://bugs.freedesktop.org/show_bug.cgi?id=76998
--- Comment #2 from tcl_de@gmx.net ---
Created attachment 96897
--> https://bugs.freedesktop.org/attachment.cgi?id=96897&action=edit
Xorg log
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2014-04-03 20:04 ` [Bug 76998] hang on CEDAR right after log on bugzilla-daemon
2014-04-04 11:43 ` bugzilla-daemon
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https://bugs.freedesktop.org/show_bug.cgi?id=76998
--- Comment #3 from tcl_de@gmx.net ---
Created attachment 96898
--> https://bugs.freedesktop.org/attachment.cgi?id=96898&action=edit
dmesg
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https://bugs.freedesktop.org/show_bug.cgi?id=76998
--- Comment #4 from tcl_de@gmx.net ---
I did a small "bisection" and installed the 3.9.0-030900-generic,
3.10.0-031000-generic and 3.14.0-031400-generic kernels from the Ubuntu
MainlineBuilds.
3.9 works, 3.10 and 3.14 hang.
The attached logs are for the 3.9 kernel.
I'm sorry, I prefer not to do a git bisect because I can only spend a limited
amount of time on this bug.
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https://bugs.freedesktop.org/show_bug.cgi?id=76998
--- Comment #5 from tcl_de@gmx.net ---
The result of the bisect is
d4788db30a1a66255b592dd12613dda80c1443f7 is the first bad commit
commit d4788db30a1a66255b592dd12613dda80c1443f7
Author: Alex Deucher
Date: Thu Feb 28 14:40:09 2013 -0500
drm/radeon/evergreen: add support for golden register init
Signed-off-by: Alex Deucher
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https://bugs.freedesktop.org/show_bug.cgi?id=76998
--- Comment #6 from Alex Deucher <agd5f@yahoo.com> ---
(In reply to comment #5)
> The result of the bisect is
> d4788db30a1a66255b592dd12613dda80c1443f7 is the first bad commit
> commit d4788db30a1a66255b592dd12613dda80c1443f7
> Author: Alex Deucher
> Date: Thu Feb 28 14:40:09 2013 -0500
>
> drm/radeon/evergreen: add support for golden register init
>
> Signed-off-by: Alex Deucher
Do you think you could go through the golden register arrays for cedar and
narrow down which register(s) are problematic?
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https://bugs.freedesktop.org/show_bug.cgi?id=76998
--- Comment #7 from tcl_de@gmx.net ---
Yes, I think I can.
In fact, I already tried and managed to go through the register arrays.
There is a single problematic register in cedar_golden_registers, namely 0x5cc.
The complete corresponding row of the array is 0x5cc, 0xffffffff, 0x00000001
(line 384).
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https://bugs.freedesktop.org/show_bug.cgi?id=76998
--- Comment #8 from Alex Deucher <agd5f@yahoo.com> ---
Created attachment 102392
--> https://bugs.freedesktop.org/attachment.cgi?id=102392&action=edit
possible fix
The attached patch should fix the issue.
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https://bugs.freedesktop.org/show_bug.cgi?id=76998
--- Comment #9 from tcl_de@gmx.net ---
I can confirm that this patch fixes the issue.
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https://bugs.freedesktop.org/show_bug.cgi?id=76998
tcl_de@gmx.net changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #10 from tcl_de@gmx.net ---
I am closing this bug as the fix has landed in kernels 3.16-rc5, 3.15.6,
3.14.13, 3.12.25 and 3.10.49 .
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