[Bug 26639] New: [radeon KMS] switching to res 1024x768 kills output

[Bug 26639] New: [radeon KMS] switching to res 1024x768 kills output

[bugzilla-daemon]

http://bugs.freedesktop.org/show_bug.cgi?id=26639

           Summary: [radeon KMS] switching to res 1024x768 kills output
           Product: DRI
           Version: DRI CVS
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Radeon
        AssignedTo: dri-devel@lists.sourceforge.net
        ReportedBy: liquid.acid@gmx.net


Created an attachment (id=33401)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=33401)
dmesg output

Hi there,

switching to resolution 1024x768 doesn't work on my hardware (RV740 + IBM P260
CRT), the CRT simply fails to receive a signal and shuts down.

xrandr output:
Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 8192 x 8192
DVI-0 disconnected (normal left inverted right x axis y axis)
DIN disconnected (normal left inverted right x axis y axis)
DVI-1 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 388mm
x 291mm
   1280x1024      85.0*+   75.0  
   1600x1200      85.0  
   1024x768       85.0     75.1     70.1     60.0  
   960x529        75.0  
   800x600        85.1     72.2     75.0     60.3     56.2  
   640x480        85.0     72.8     75.0     60.0  
   720x400        87.8     70.1  

1280x1024 is the standard mode and I just tried it: Every other mode works
completly fine - just the 1024x768 mode results in no signal.

No interesting output in dmesg when switching via xrandr.

Kernel is uptodate drm-linux branch of airlied's tree. But this also happens
with drm-radeon-testing. Not sure if it's a KMS problem, but at least it
happens with KMS enabled.

I can try a testrun with modeset disabled, if that helps.

Greets,
Tobias


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[Bug 26639] [radeon KMS] switching to res 1024x768 kills output

[bugzilla-daemon]

http://bugs.freedesktop.org/show_bug.cgi?id=26639


Tobias Jakobi <liquid.acid@gmx.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         OS/Version|All                         |Linux (All)
           Platform|Other                       |x86-64 (AMD64)




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[Bug 26639] [radeon KMS] switching to res 1024x768 kills output

[bugzilla-daemon]

http://bugs.freedesktop.org/show_bug.cgi?id=26639





--- Comment #1 from Tobias Jakobi <liquid.acid@gmx.net>  2010-02-18 13:13:45 PST ---
Created an attachment (id=33402)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=33402)
xorg logfile


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[Bug 26639] [radeon KMS] switching to res 1024x768 kills output

[bugzilla-daemon]

http://bugs.freedesktop.org/show_bug.cgi?id=26639





--- Comment #2 from Tobias Jakobi <liquid.acid@gmx.net>  2010-02-18 13:24:00 PST ---
Created an attachment (id=33403)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=33403)
EDID extracted from P260


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[Bug 26639] [radeon KMS] switching to res 1024x768 kills output

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http://bugs.freedesktop.org/show_bug.cgi?id=26639





--- Comment #3 from Alex Deucher <agd5f@yahoo.com>  2010-02-18 22:57:12 PST ---
which 1024x768 mode is problematic?  You have 4 of them:
1024x768       85.0     75.1     70.1     60.0  

Does loading the radeon module with new_pll=0 help?
e.g.,
modprobe radeon new_pll=0


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[Bug 26639] [radeon KMS] switching to res 1024x768 kills output

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http://bugs.freedesktop.org/show_bug.cgi?id=26639





--- Comment #4 from Tobias Jakobi <liquid.acid@gmx.net>  2010-02-19 02:11:49 PST ---
Yeah, sorry about that. I was talking about the 85hz refresh rate one, I mostly
use 85hz refresh when it's available.

Going to test the new_pll parameters this evening and probably going to do also
a check with KMS disabled.

Would it help to check the 1024x768 mode with the other refresh rates?


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[Bug 26639] [radeon KMS] switching to res 1024x768 kills output

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http://bugs.freedesktop.org/show_bug.cgi?id=26639





--- Comment #5 from Alex Deucher <agd5f@yahoo.com>  2010-02-19 08:18:16 PST ---
(In reply to comment #4)
> Would it help to check the 1024x768 mode with the other refresh rates?
> 

for thoroughness, but if they do have problems, it's likely the same issue as
the 85 hz one.


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[Bug 26639] [radeon KMS] switching to res 1024x768 kills output

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http://bugs.freedesktop.org/show_bug.cgi?id=26639





--- Comment #6 from Tobias Jakobi <liquid.acid@gmx.net>  2010-02-19 14:49:58 PST ---
OK, tests done.

First of all: All other 1024x768 modes except the 85Hz one work, it's just this
single one that makes the signal go weird

Disabling new_pll -> no change at all
Disabling KMS does the trick, switching to 1024x768 works again

Ready for more tests, so what should I do?


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[Bug 26639] [radeon KMS] switching to res 1024x768 kills output

[bugzilla-daemon]

http://bugs.freedesktop.org/show_bug.cgi?id=26639





--- Comment #7 from Alex Deucher <agd5f@yahoo.com>  2010-02-19 15:20:14 PST ---
(In reply to comment #6)
> OK, tests done.
> 
> First of all: All other 1024x768 modes except the 85Hz one work, it's just this
> single one that makes the signal go weird
> 
> Disabling new_pll -> no change at all
> Disabling KMS does the trick, switching to 1024x768 works again

Can you attach the log from the working run?


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[Bug 26639] [radeon KMS] switching to res 1024x768 kills output

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http://bugs.freedesktop.org/show_bug.cgi?id=26639





--- Comment #8 from Tobias Jakobi <liquid.acid@gmx.net>  2010-02-19 15:38:00 PST ---
Created an attachment (id=33441)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=33441)
xorg log when output works


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[Bug 26639] [radeon KMS] switching to res 1024x768 kills output

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http://bugs.freedesktop.org/show_bug.cgi?id=26639





--- Comment #9 from Alex Deucher <agd5f@yahoo.com>  2010-02-23 10:20:41 PST ---
Does UMS from git master, or this patch for KMS help?
http://people.freedesktop.org/~agd5f/0001-drm-radeon-kms-update-new-pll-algo.patch


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[Bug 26639] [radeon KMS] switching to res 1024x768 kills output

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http://bugs.freedesktop.org/show_bug.cgi?id=26639





--- Comment #10 from Tobias Jakobi <liquid.acid@gmx.net>  2010-02-23 13:10:45 PST ---
Nope, makes no difference.

By UMS you mean userspace mode setting? Like I said this works - modprobe
radeon with modeset=0 and switching works.


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[Bug 26639] [radeon KMS] switching to res 1024x768 kills output

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http://bugs.freedesktop.org/show_bug.cgi?id=26639





--- Comment #11 from Alex Deucher <agd5f@yahoo.com>  2010-02-23 19:14:08 PST ---
Does the patch on bug 26668 help?


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[Bug 26639] [radeon KMS] switching to res 1024x768 kills output

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http://bugs.freedesktop.org/show_bug.cgi?id=26639





--- Comment #12 from Tobias Jakobi <liquid.acid@gmx.net>  2010-02-24 14:42:34 PST ---
No, just applied the fix to my tree but the issue stays the same.


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[Bug 26639] [radeon KMS] switching to res 1024x768 kills output

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http://bugs.freedesktop.org/show_bug.cgi?id=26639





--- Comment #13 from Tobias Jakobi <liquid.acid@gmx.net>  2010-03-09 07:04:34 PST ---
A funny (maybe significant?) detail:
ut2003 works in 1024x768 mode - my guess is that it's not using xrandr to
switch the res but the old method, I think it was via XVidMode


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[Bug 26639] [radeon KMS] switching to res 1024x768 kills output

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http://bugs.freedesktop.org/show_bug.cgi?id=26639





--- Comment #14 from Alex Deucher <agd5f@yahoo.com>  2010-03-09 07:11:22 PST ---
(In reply to comment #13)
> A funny (maybe significant?) detail:
> ut2003 works in 1024x768 mode - my guess is that it's not using xrandr to
> switch the res but the old method, I think it was via XVidMode
> 

It's likely not picking the same mode (i.e., probably not the same 85 hz mode).


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[Bug 26639] [radeon KMS] switching to res 1024x768 kills output

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http://bugs.freedesktop.org/show_bug.cgi?id=26639





--- Comment #15 from Tobias Jakobi <liquid.acid@gmx.net>  2010-03-09 14:35:28 PST ---
Yeah, you're right - it picks the 60Hz. Looks like I have to manually edit the
INI to let it choose the 85Hz mode.


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[Bug 26639] [radeon KMS] switching to res 1024x768 kills output

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https://bugs.freedesktop.org/show_bug.cgi?id=26639

--- Comment #16 from Tobias Jakobi <liquid.acid@gmx.net> 2010-04-15 15:47:54 PDT ---
Yesterday I updated libdrm, mesa and xf86-video-ati to git master tip and also
pulled the latest stuff from drm-radeon-testing.

Issue is still there.

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[Bug 26639] [radeon KMS] switching to res 1024x768 kills output

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https://bugs.freedesktop.org/show_bug.cgi?id=26639

Alex Deucher <agd5f@yahoo.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED

--- Comment #17 from Alex Deucher <agd5f@yahoo.com> 2010-05-13 14:18:07 PDT ---
This is a bug in the drm edid handling.  Patch is here:
http://lists.freedesktop.org/archives/dri-devel/2010-May/000611.html

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[Bug 26639] [radeon KMS] switching to res 1024x768 kills output

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https://bugs.freedesktop.org/show_bug.cgi?id=26639

--- Comment #18 from Tobias Jakobi <liquid.acid@gmx.net> 2010-05-16 13:36:20 PDT ---
Nice, just applied the patch and 1024x768@85Hz works again!

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