[Bug 20752] New: [KMS] radeon not working reliable with X1300

[Bug 20752] New: [KMS] radeon not working reliable with X1300

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=20752

           Summary: [KMS] radeon not working reliable with X1300
           Product: Drivers
           Version: 2.5
    Kernel Version: 2.6.35
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
        AssignedTo: drivers_video-dri@kernel-bugs.osdl.org
        ReportedBy: tkrah@fachschaft.imn.htwk-leipzig.de
        Regression: No


Hi,

got a 

01:00.0 VGA compatible controller: ATI Technologies Inc RV516 [Radeon
X1300/X1550 Series]

card and tried to use KMS and radeon since its in the mainline tree but got no
luck yet.
Resolution change does work and X is working too but there are some "bugs"
which makes it unusable.

1. Console/Screen does blank from time to time - i can switch to first tty and
wait and seeing the screen going blank for seconds and reappearing few seconds
later. It does this a few times per minute.
Using X it appears to be not that often but still happening.
2. In X Screen does have some black lines running over the screen every time -
reading some text on white background is really hard because of these black
lines running through the screen everytime, hope you know what i mean - can't
make a screenshot - this may not be related to KMS at all and i have to talk to
Xorg guys for this error - please tell me - don't know where to report this one
best.

The only configuration which is usable in terms of you can do your work >1 hour
is to disable KMS and using the "old" radeonhd Xorg driver - which does work
fine and without those "glitches".
Any help or information i can provide to make radeon "work" like radeonhd?

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[Bug 20752] [KMS] radeon not working reliable with X1300

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https://bugzilla.kernel.org/show_bug.cgi?id=20752





--- Comment #1 from Torsten Krah <tkrah@fachschaft.imn.htwk-leipzig.de>  2010-10-19 08:27:53 ---
Additional info, graphics chip is an RV516:

[ 59807.498] (II) RADEONHD(0): Card not in database: 0x7187:0x1028:0x0402;
using generic modesetting.
[ 59807.498] (--) RADEONHD(0): Detected an RV516 on an unidentified card

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[Bug 20752] [KMS] radeon not working reliable with X1300

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https://bugzilla.kernel.org/show_bug.cgi?id=20752


Alex Deucher <alexdeucher@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |alexdeucher@gmail.com




--- Comment #2 from Alex Deucher <alexdeucher@gmail.com>  2010-10-19 15:46:15 ---
Does booting with radeon.new_pll=0 on your kernel command line help? 
Additionally, can you try Dave's drm-next branch?  It has some other pll
changes.
http://git.kernel.org/?p=linux/kernel/git/airlied/drm-2.6.git;a=shortlog;h=refs/heads/drm-next

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[Bug 20752] [KMS] radeon not working reliable with X1300

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https://bugzilla.kernel.org/show_bug.cgi?id=20752





--- Comment #3 from Alex Deucher <alexdeucher@gmail.com>  2010-10-19 20:58:25 ---
Another thing to try assuming this is a digital monitor (DVI or HDMI):
xrandr --output <output> --set coherent 0

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[Bug 20752] [KMS] radeon not working reliable with X1300

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https://bugzilla.kernel.org/show_bug.cgi?id=20752





--- Comment #4 from Torsten Krah <tkrah@fachschaft.imn.htwk-leipzig.de>  2010-10-20 09:00:59 ---
Thanks Alex for those hints.
radeon.new_pll=0 makes the first problem go away, no screen blanking anymore
yet.
The second one is still there - not that often as before the adding the pll
boot parameter but still there.
Using your second hint with xrandr --output DVI-0 --set coherent 0 seems to
help with this, no more black lines on my screen. Nice.

I'll report again in one or two days of working if the problems are really gone
- but the first impression looks promising - using both, new_pll=0 and xrandr
coherent = 0 seems to make things work.

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[Bug 20752] [KMS] radeon not working reliable with X1300

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https://bugzilla.kernel.org/show_bug.cgi?id=20752





--- Comment #5 from Torsten Krah <tkrah@fachschaft.imn.htwk-leipzig.de>  2010-10-22 13:02:23 ---
Till now all is working, guess this is gone with those 2 workarounds. Thanks.

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[Bug 20752] [KMS] radeon not working reliable with X1300

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https://bugzilla.kernel.org/show_bug.cgi?id=20752





--- Comment #6 from Alex Deucher <alexdeucher@gmail.com>  2010-10-22 15:30:32 ---
The old pll code will be the default in 2.6.37, so in 2.6.37, you'll just need
to adjust the coherent option.

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[Bug 20752] [KMS] radeon not working reliable with X1300

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https://bugzilla.kernel.org/show_bug.cgi?id=20752





--- Comment #7 from Torsten Krah <tkrah@fachschaft.imn.htwk-leipzig.de>  2011-04-06 10:55:40 ---
Is there any way to get KMS working without X?
Without the coherent option my screen blanks on/off - i cant work with it.
I need to run X and hava to issue (via xdg autostart e.g.) the xrandr command
to be able to work.
Using only the console is not possible - any hint here? Is there a KMS option
which does the same?

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[Bug 20752] [KMS] radeon not working reliable with X1300

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https://bugzilla.kernel.org/show_bug.cgi?id=20752





--- Comment #8 from Alex Deucher <alexdeucher@gmail.com>  2011-04-06 14:36:25 ---
(In reply to comment #7)
> Is there any way to get KMS working without X?

Are things working any better with 2.6.38?

> Without the coherent option my screen blanks on/off - i cant work with it.
> I need to run X and hava to issue (via xdg autostart e.g.) the xrandr command
> to be able to work.
> Using only the console is not possible - any hint here? Is there a KMS option
> which does the same?

No one has written a sysfs interface to change connector attributes yet.  It
would be useful though.  Another alternative would be to write a command line
app that uses the same ioctls X uses to change the attributes.

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[Bug 20752] [KMS] radeon not working reliable with X1300

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https://bugzilla.kernel.org/show_bug.cgi?id=20752





--- Comment #9 from Torsten Krah <tkrah@fachschaft.imn.htwk-leipzig.de>  2011-04-06 18:21:51 ---
I am using 2.6.38.2 (2.6.38-7 natty build) and things does not work better -
monitor still blanks all the time around until coherent is set.

Oh i guess its beyond my "skills" to write such a command line app :-| or
export those attributes to sysfs - although it would be nice to have either one
of those options.

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[Bug 20752] [KMS] radeon not working reliable with X1300

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https://bugzilla.kernel.org/show_bug.cgi?id=20752


Alan <alan@lxorguk.ukuu.org.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |alan@lxorguk.ukuu.org.uk
     Kernel Version|2.6.35                      |2.6.38




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[Bug 20752] [KMS] radeon not working reliable with X1300

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https://bugzilla.kernel.org/show_bug.cgi?id=20752

Alan <alan@lxorguk.ukuu.org.uk> changed:

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

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