[Bug 34220] Detects Load on output and blinks screen every ~30secs - bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ

From: bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ@public.gmane.org
To: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
Subject: [Bug 34220] Detects Load on output and blinks screen every ~30secs
Date: Tue, 25 Feb 2014 22:51:37 +0000	[thread overview]
Message-ID: <bug-34220-8800-vVcy53ch2s@http.bugs.freedesktop.org/> (raw)
In-Reply-To: <bug-34220-8800-V0hAGp6uBxMKqLRl/0Ahz6D7qz1kEfGD2LY78lusg7I@public.gmane.org/>

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

--- Comment #12 from johnlu best <johnlubest-/E1597aS9LQAvxtiuMwx3w@public.gmane.org> ---
(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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