Bug#467105: ATI driver: use of Xv causes one monitor to be repeatedly blanked

[Darren Salt]

retitle 467105 ATI driver: "xset dpms force on" causes one monitor to be blanked briefly
thanks

I demand that Alex Deucher may or may not have written...

> On Sun, Feb 24, 2008 at 11:21 AM, Darren Salt
> <linux at youmustbejoking.demon.co.uk> wrote:
>> I demand that Brice Goglin may or may not have written...
>>> Darren Salt wrote:
>>>> One of my monitors (VGA-0) is repeatedly and regularly blanked and
>>>> unblanked, each change being approx. 1s apart when Xv is in use, e.g. by
>>>> gxine.
>> Actually, more like 1s off, 3s on, and for each pair of state changes,
>> there is a corresponding pair of
>>   enable montype: 1
>>   enable montype: 3
>> in the log.

> Why is gxine calling the DPMS hooks for the monitors?

It's designed to allow blanking when nothing is being played or the stream is
paused; on starting or resuming playback, it is intended that gxine will
unblank the display automatically. (There's no guarantee that the method used
to resume or start playback will also cause X to automatically unblank the
display; equally, there's no guarantee that the screen blanker will have cut
in, and gxine has no knowledge of whether it has.)

Also, I don't want it to ever be able to fail to restore the DPMS settings –
by not altering them, there's nothing to restore. This does require ensuring
that the blank timer never reaches 0 (unless it's set ludicrously low).

> Do other video players have the same problem?

Any which use the same methods will, since "xset dpms force on" is sufficient
to trigger the problem.

-- 
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| RISC OS, Linux | youmustbejoking,demon,co,uk | Northumberland | Army
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