Nouveau - Feb 2011 - [Bug 34220] New: Detects Load on output and blinks screen ~30secs

https://bugs.freedesktop.org/show_bug.cgi?id=34220

           Summary: Detects Load on output and blinks screen ~30secs
           Product: xorg
           Version: unspecified
          Platform: Other
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
        AssignedTo: nouveau at lists.freedesktop.org
        ReportedBy: mmendez534 at gmail.com
         QAContact: xorg-team at lists.x.org


Card is GeForce 7100 GS
OS is Arch latest.

Problem:
Every 30 seconds the monitor connected via VGA blinks off, and then comes back
on. dmesg output shows '[drm] nouveau 0000:01:00.0: Load detected on output
A'.

The resolution is also incorrectly detected/set to '1024x768', when
'1920x1080'
should be the preferred. If I add the other monitor's (DVI) preferred mode
to
the VGA and then set that as the mode it works fine.

I have seen bugs 26800, and 29455 but they don't quite match my problem. I
don't want TV out and my resolutions are fine after I add the mode to the
output and select it. Turning off TV-1 doesn't fix the problem.

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Manuel Mendez <mmendez534 at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Detects Load on output and  |Detects Load on output and
                   |blinks screen ~30secs       |blinks screen every ~30secs

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Gy?rgy Ball? <ballogy at freestart.hu> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ballogy at freestart.hu

--- Comment #1 from Gy?rgy Ball? <ballogy at freestart.hu> 2011-03-09
19:59:07 PST ---
Same here, the screen randomly blinks out in every 30/60/90th? seconds. (I also
use Arch Linux)

My video card:
01:00.0 VGA compatible controller: nVidia Corporation NV17 [GeForce4 MX 440]
(rev a3)

The error message on each blink from everything.log:
kernel: [drm] nouveau 0000:01:00.0: DDC responded, but no EDID for VGA-1
kernel: [drm] nouveau 0000:01:00.0: Load detected on output A

Package versions:
kernel26 2.6.37.3-1
libdrm 2.4.23-2
xf86-video-nouveau 0.0.16_git20101217-1
xorg-server 1.9.4-1
libgl 7.10.1-1
mesa 7.10.1-1

I reported this bug on Arch Linux bugtracker also:
https://bugs.archlinux.org/task/23213

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Nikolay Rysev <mad.f3ka at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mad.f3ka at gmail.com

--- Comment #2 from Nikolay Rysev <mad.f3ka at gmail.com> 2011-03-20
03:51:58 PDT ---
*** Bug 34972 has been marked as a duplicate of this bug. ***

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--- Comment #3 from noviktor at seznam.cz 2011-03-23 06:59:29 PDT ---
I have same problem, card is
01:00.0 VGA compatible controller: nVidia Corporation NV25 [GeForce4 Ti 4200]
(rev a3)
OS is Gentoo.
I tried
Nouveau kernels 2.6.38-rc8-g7972f91 and 2.6.37-rc3-gd095e23,
xorg-servers 1.9.4, 1.9.5 and 1.10.0,
xf86-video-nouveau 0.0.16_pre20101130 and git 92db2bc.

Nothing helped, so I tried proprietary drivers 96.43.19 and noticed line
[    30.567] (WW) NVIDIA(GPU-0): Unable to read EDID for display device CRT-1
This lead me to trying i2cdetect and indeed on all 3 i2c adapters there is
nothing on adress 0x50, where EDID should be. Any ideas?

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--- Comment #4 from noviktor at seznam.cz 2011-03-23 07:01:13 PDT ---
Created an attachment (id=44752)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=44752)
Xorg log with nouveau driver

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--- Comment #5 from noviktor at seznam.cz 2011-03-23 07:01:52 PDT ---
Created an attachment (id=44753)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=44753)
kernel log with nouveau driver

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--- Comment #6 from noviktor at seznam.cz 2011-03-23 07:02:23 PDT ---
Created an attachment (id=44754)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=44754)
Xorg log with nvidia driver

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--- Comment #7 from Manuel Mendez <mmendez534 at gmail.com> 2011-03-26
07:58:04 PDT ---
dmesg now outputs this:

[drm] nouveau 0000:01:00.0: Load detected on output A
[drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 222
[drm] nouveau 0000:01:00.0: Load detected on output A
[drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 222
[drm] nouveau 0000:01:00.0: Load detected on output A
[drm] nouveau 0000:01:00.0: Setting dpms mode 0 on vga encoder (output 0)
[drm] nouveau 0000:01:00.0: Setting dpms mode 0 on tmds encoder (output 2)

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--- Comment #8 from Viktor Novotn? <noviktor at seznam.cz> 2011-03-30
13:40:33 PDT ---
Turns out in my case problem was caused either by bad cable or dust in the
monitor, after dusting monitor and manipulating with the cable, EDID is
detected again, so sorry for the noise.

Anyway, should really Nouveau blink the monitor every 30s when it does not
detect EDID?

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--- Comment #9 from Ruslan Kabatsayev <b7.10110111 at gmail.com> ---
I have the same problem with GeForce GTX 460 and nouveau. And indeed, even
official nvidia driver doesn't find EDID for the screen which blinks with
nouveau. Still, binary nvidia drives that monitor OK, so nouveau should too.

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Gy?rgy Ball? <ballogy at freestart.hu> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|ballogy at freestart.hu        |

--- Comment #10 from Gy?rgy Ball? <ballogy at freestart.hu> ---
I think it has been fixed in upower with this commit:

 Add an option for polling dock devices in UPower.conf, defaulting to false

http://cgit.freedesktop.org/upower/commit/?id=38199e44ff1e87b586d51d30b69d1f70e40d27f1

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--- Comment #11 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Sounds like the bug here is that nouveau causes the VGA display to blink on/off
when checking whether it is connected. (And, to exacerbate the issue,
there's
something polling every 30s to see if the monitor is connected/what modes it
has or something.)

Could someone with an affected monitor try to

cat /sys/class/drm/card0-VGA-0/status

(or whatever card/connector the thing is on)

and see if that action causes the monitor to blink on/off? If not, check
/sys/.../modes and .../edid and .../dpms. I'm guessing at least one of those
will cause the blinking issue.

My understanding of the VGA DDC stuff is that the monitor doesn't even have
to
be powered on in order to get at that stuff (I guess power is supplied in the
VGA cable itself), much less have to try to show a picture. Although perhaps
not all monitors comply with that ideal.

BTW, please be sure to test it out with the latest kernel, just in case this
has been fixed.

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--- Comment #12 from johnlu best <johnlubest at yahoo.com> ---
(In reply to comment #11)
> Sounds like the bug here is that nouveau causes the VGA display to blink
> on/off when checking whether it is connected. (And, to exacerbate the
issue,
> there's something polling every 30s to see if the monitor is
connected/what
> modes it has or something.)
> 
> Could someone with an affected monitor try to
> 
> cat /sys/class/drm/card0-VGA-0/(In reply to comment #11)
> Sounds like the bug here is that nouveau causes the VGA display to blink
> on/off when checking whether it is connected. (And, to exacerbate the
issue,
> there's something polling every 30s to see if the monitor is
connected/what
> modes it has or something.)
> 
> Could someone with an affected monitor try to
> 
> cat /sys/class/drm/card0-VGA-0/status
> 
> (or whatever card/connector the thing is on)
> 
> and see if that action causes the monitor to blink on/off? If not, check
> /sys/.../modes and .../edid and .../dpms. I'm guessing at least one of
those
> will cause the blinking issue.
> 
> My understanding of the VGA DDC stuff is that the monitor doesn't even
have
> to be powered on in order to get at that stuff (I guess power is supplied
in
> the VGA cable itself), much less have to try to show a picture. Although
> perhaps not all monitors comply with that ideal.
> 
> BTW, please be sure to test it out with the latest kernel, just in case
this
> has been fixed.
I can confirm that blinking issue after cat /sys/class/drm/card0-VGA-0/status
every ~30 seconds. I'm using nvidia 7300 gt. do you need more data?

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--- Comment #13 from Ilia Mirkin <imirkin at alum.mit.edu> ---
(In reply to comment #12)
> I can confirm that blinking issue after cat
> /sys/class/drm/card0-VGA-0/status every ~30 seconds. I'm using nvidia
7300
> gt. do you need more data?
I'm very confused by your comment. Does cat'ing the status cause an
immediate
blink, yes or no? (Your comment, taken literally, seems to imply that things
are all fine, then you cat the file, and then the blink happens every 30s. This
seems unlikely.)

What kernel version are you using?

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Martin Peres <martin.peres at free.fr> changed:

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

--- Comment #14 from Martin Peres <martin.peres at free.fr> ---
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