[Bug 34237] New: External LCD monitor flickers every 30 seconds radeon mobility x1400

[Bug 34237] New: External LCD monitor flickers every 30 seconds radeon mobility x1400

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=34237

           Summary: External LCD monitor flickers every 30 seconds radeon
                    mobility x1400
           Product: DRI
           Version: unspecified
          Platform: x86 (IA32)
        OS/Version: Linux (All)
            Status: NEW
          Severity: critical
          Priority: medium
         Component: DRM/Radeon
        AssignedTo: dri-devel@lists.freedesktop.org
        ReportedBy: prijatelj.mp3@gmail.com


OS: ArchLnux
driver: 6.14.0-1
kernel: 2.6.37-5
libdrm: 2.4.23-1
mesa: 7.10.0.git20110206-2
KMS: yes
graphic card: mobility x1400

-----------------------
To reproduce.
LCD monitor is plugged into laptop. While KDE4 is loading external monitor
flickeres once. When KDE4 is already loaded external monitor flickers twice in
a row with 2 seconds delay. One flick is lasting about one second. Then
external lcd monitor flickers every 30 seconds. It also flickeres if I just
type a command: 'xrandr'.

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[Bug 34237] External LCD monitor flickers every 30 seconds radeon mobility x1400

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https://bugs.freedesktop.org/show_bug.cgi?id=34237

--- Comment #1 from Alex Deucher <agd5f@yahoo.com> 2011-02-13 13:58:53 PST ---
This sounds like monitor polling on the analog port.  Disable it by booting
with
drm_kms_helper.poll=0 on your kernel command line in grub.  Also make sure kde
is not polling the monitors itself in the background at regular intervals.

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[Bug 34237] External LCD monitor flickers every 30 seconds radeon mobility x1400

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=34237

comio <luigi.mantellini@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |luigi.mantellini@gmail.com

--- Comment #2 from comio <luigi.mantellini@gmail.com> 2011-02-14 08:20:47 PST ---
(In reply to comment #1)
> This sounds like monitor polling on the analog port.  Disable it by booting
> with
> drm_kms_helper.poll=0 on your kernel command line in grub.  Also make sure kde
> is not polling the monitors itself in the background at regular intervals.

OK I have the same issue. I surely disable the polling in kms... but I don't
know where I can disable the monitor polling in KDE... any idea?

thanks

luigi

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[Bug 34237] External LCD monitor flickers every 30 seconds radeon mobility x1400

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=34237

--- Comment #3 from Alex Deucher <agd5f@yahoo.com> 2011-02-14 08:29:08 PST ---
(In reply to comment #2)
> OK I have the same issue. I surely disable the polling in kms... but I don't
> know where I can disable the monitor polling in KDE... any idea?

I'm not that familiar with kde.  I've heard knotify might do it.  You might
want to ask on one of the kde mailing lists or kde bugzilla.

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[Bug 34237] External LCD monitor flickers every 30 seconds radeon mobility x1400

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=34237

--- Comment #4 from comio <luigi.mantellini@gmail.com> 2011-02-14 10:45:50 PST ---
(In reply to comment #3)
> (In reply to comment #2)
> > OK I have the same issue. I surely disable the polling in kms... but I don't
> > know where I can disable the monitor polling in KDE... any idea?
> 
> I'm not that familiar with kde.  I've heard knotify might do it.  You might
> want to ask on one of the kde mailing lists or kde bugzilla.

poll=0 doesn't solve the problem. Anyway... I think that knotify4 is the
culprit.

ciao

luigi

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[Bug 34237] External LCD monitor flickers every 30 seconds radeon mobility x1400

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https://bugs.freedesktop.org/show_bug.cgi?id=34237

--- Comment #5 from comio <luigi.mantellini@gmail.com> 2011-02-14 11:00:19 PST ---
My configuration is very similar to Joze:
OS: Gentoo
driver: video-ati 6.14.0
kernel: 2.6.37
libdrm: 2.4.23
mesa: 7.10
KMS: yes
graphic card: mobility x1400

PC Dell Inspiron 6400

The second screen is not usable... and I don't understand how I can disable the
polling.

ciao

luigi

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[Bug 34237] External LCD monitor flickers every 30 seconds radeon mobility x1400

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https://bugs.freedesktop.org/show_bug.cgi?id=34237

--- Comment #6 from comio <luigi.mantellini@gmail.com> 2011-02-14 11:25:23 PST ---
Can be related?

http://bugs.kde.org/show_bug.cgi?id=170920

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[Bug 34237] External LCD monitor flickers every 30 seconds radeon mobility x1400

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https://bugs.freedesktop.org/show_bug.cgi?id=34237

Alex Deucher <agd5f@yahoo.com> changed:

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

--- Comment #7 from Alex Deucher <agd5f@yahoo.com> 2011-02-14 12:15:54 PST ---
(In reply to comment #6)
> Can be related?
> 
> http://bugs.kde.org/show_bug.cgi?id=170920

Probably the same issue.  This is most likely a KDE issue rather than a driver
issue.

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[Bug 34237] External LCD monitor flickers every 30 seconds radeon mobility x1400

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https://bugs.freedesktop.org/show_bug.cgi?id=34237

--- Comment #8 from comio <luigi.mantellini@gmail.com> 2011-02-14 12:44:42 PST ---
This seems to be related (I will check asap)

https://bugzilla.kernel.org/show_bug.cgi?id=26552

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[Bug 34237] External LCD monitor flickers every 30 seconds radeon mobility x1400

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https://bugs.freedesktop.org/show_bug.cgi?id=34237

--- Comment #9 from Jože Prijatelj <prijatelj.mp3@gmail.com> 2011-02-15 08:48:42 PST ---
(In reply to comment #8)
> This seems to be related (I will check asap)
> 
> https://bugzilla.kernel.org/show_bug.cgi?id=26552

This is not a KDE4 related. I experience this also with xmonad, openbox,
lxde...

@Comio I also have this problems as on that link you pasted:
https://bugzilla.kernel.org/show_bug.cgi?id=26552 I've also uploaded a video
http://www.youtube.com/watch?v=rjhAknBoJDE

Has anyone found a solution yet to one or another bug? (if they are even
related) or do we have to wait for next kernel release?

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[Bug 34237] External LCD monitor flickers every 30 seconds radeon mobility x1400

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=34237

--- Comment #10 from comio <luigi.mantellini@gmail.com> 2011-02-15 08:54:25 PST ---
(In reply to comment #9)
> (In reply to comment #8)
> > This seems to be related (I will check asap)
> > 
> > https://bugzilla.kernel.org/show_bug.cgi?id=26552
> 
> This is not a KDE4 related. I experience this also with xmonad, openbox,
> lxde...
> 
> @Comio I also have this problems as on that link you pasted:
> https://bugzilla.kernel.org/show_bug.cgi?id=26552 I've also uploaded a video
> http://www.youtube.com/watch?v=rjhAknBoJDE
> 
> Has anyone found a solution yet to one or another bug? (if they are even
> related) or do we have to wait for next kernel release?


Try to use the old pll (new_pll=0 option). My problem is different: when the
software probes the second screen (like xrandr -q) the external monitor shows
for a second a black screen. The solution seems to disable the krandr
periodical probe... but I will test in this afternoon at home.

best regards.

luigi

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[Bug 34237] External LCD monitor flickers every 30 seconds radeon mobility x1400

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https://bugs.freedesktop.org/show_bug.cgi?id=34237

--- Comment #11 from Alex Deucher <agd5f@yahoo.com> 2011-02-15 09:20:54 PST ---
I think there may be several different issues here: 
1. blinking when probing displays
2. unstable display all the time

If you have an unstable display all the time, please try Dave's drm-fixes
kernel tree:
http://git.kernel.org/?p=linux/kernel/git/airlied/drm-2.6.git;a=shortlog;h=refs/heads/drm-fixes

If you just have display problems when probing the displays (either manually
with xrandr or polling by kde) you'll need to disable the polling.

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[Bug 34237] External LCD monitor flickers every 30 seconds radeon mobility x1400

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https://bugs.freedesktop.org/show_bug.cgi?id=34237

--- Comment #12 from Jože Prijatelj <prijatelj.mp3@gmail.com> 2011-02-15 09:35:40 PST ---
(In reply to comment #11)
> I think there may be several different issues here: 
> 1. blinking when probing displays
> 2. unstable display all the time
> 
> If you have an unstable display all the time, please try Dave's drm-fixes
> kernel tree:
> http://git.kernel.org/?p=linux/kernel/git/airlied/drm-2.6.git;a=shortlog;h=refs/heads/drm-fixes
> 
> If you just have display problems when probing the displays (either manually
> with xrandr or polling by kde) you'll need to disable the polling.

Wow. radeon.new_pll=0 solved the every 30 seconds flickering. I have running
krandr in KDE4 and it doesn't flicker.

So this bug should be marked as solved?

Now I have to try Dave's drm-fixes (Which is another bug).

Thank you comio.
Thank you Alex Deucher for that link. I'm gonna try it.

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[Bug 34237] External LCD monitor flickers every 30 seconds radeon mobility x1400

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https://bugs.freedesktop.org/show_bug.cgi?id=34237

--- Comment #13 from Alex Deucher <agd5f@yahoo.com> 2011-02-15 09:45:54 PST ---
(In reply to comment #12)
> 
> Wow. radeon.new_pll=0 solved the every 30 seconds flickering. I have running
> krandr in KDE4 and it doesn't flicker.
> 
> So this bug should be marked as solved?
> 
> Now I have to try Dave's drm-fixes (Which is another bug).
> 
> Thank you comio.
> Thank you Alex Deucher for that link. I'm gonna try it.

the new_pll option was removed in 2.6.37, so you probably just disabled kms. 
I'd recommend drm-fixes as it contains several pll fixes that should fix your
problem.

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[Bug 34237] External LCD monitor flickers every 30 seconds radeon mobility x1400

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--- Comment #14 from Thierry Vignaud <thierry.vignaud@gmail.com> 2011-03-02 01:55:46 PST ---
I've tried 2.6.38-rc6-git 7 (which seems to include Dave's drm-fixes) w/o any
success. I still got intermitent black screen.
For the record, my LCD is behind a KVM that corrupts EDID thus making the
kernel to keep loudly complaining in dmesg

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[Bug 34237] External LCD monitor flickers every 30 seconds radeon mobility x1400

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--- Comment #15 from Alex Deucher <agd5f@yahoo.com> 2011-03-02 07:28:27 PST ---
(In reply to comment #14)
> I've tried 2.6.38-rc6-git 7 (which seems to include Dave's drm-fixes) w/o any
> success. I still got intermitent black screen.
> For the record, my LCD is behind a KVM that corrupts EDID thus making the
> kernel to keep loudly complaining in dmesg

It it happens it regular intervals it sounds like some sort of polling.  Have
you tried drm_kms_helper.poll=0?  Also, make sure knotify or upowerd are not
polling the monitors regularly.

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