[Intel-gfx] CRT not detected via hotplug on resume

[Rainer Dorsch]

Keith,

many thanks for the quick and useful reply.

Am Wednesday, 21. September 2011 schrieb Keith Packard:
> On Wed, 21 Sep 2011 14:23:01 +0200, Rainer Dorsch <ml at bokomoko.de> wrote:
> > Hello,
> > 
> > after resuming my graphics card sometimes does not come up (see my post
> > yesterday).
> > 
> > Comparing drm outputs with drm.debug=6 in syslog reveals among others
> > 
> > 	[drm:intel_crt_detect], CRT not detected via hotplug hotplug"
> > 
> > Does that mean that the monitor (EIZO FlexScan L767) is not reliably
> > detected?
> 
> No, your monitor is not connected on a VGA cable, but an HDMI (or DVI)
> cable through an SDVO card.

Indeed, that is true.

> I don't see any visible differences between the two resume sequences.

Hmm...that is bad news. 

Since I can ssh into the machine, when the problem occurs, are there some 
diagnosis scripts/tools I could run?

> > Is that a know problem? Does it make sense to open a bug report?
> 
> I haven't heard of any trouble with resume on SVDO cards, but I also
> don't know many machines using this.
> 
> Note that there's some review going on that supports hot-plug on SDVO
> connected HDMI displays; it's possible that might help in your case, so
> you might want to try that patch.

Are you refereing to the mail from Simon from yesterday:

[Intel-gfx] [PATCHv5] drm/i915: Enable SDVO hotplug interrupts for HDMI and 
DVI

?

Do you expect that it can be applied to a Linux 3.0 kernel?

Thanks again,
Rainer

-- 
Rainer Dorsch
http://bokomoko.de/