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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Detects Load on output and blinks screen every ~30secs"
href="https://bugs.freedesktop.org/show_bug.cgi?id=34220#c12">Comment # 12</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Detects Load on output and blinks screen every ~30secs"
href="https://bugs.freedesktop.org/show_bug.cgi?id=34220">bug 34220</a>
from <span class="vcard"><a class="email" href="mailto:johnlubest@yahoo.com" title="johnlu best <johnlubest@yahoo.com>"> <span class="fn">johnlu best</span></a>
</span></b>
<pre>(In reply to <a href="show_bug.cgi?id=34220#c11">comment #11</a>)
<span class="quote">> 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 <a href="show_bug.cgi?id=34220#c11">comment #11</a>)
> 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.</span >
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?</pre>
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