[Bug 66494] [sna] Output at last pipe stays black

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=66494

--- Comment #5 from Daniel Martin <consume.noise at gmail.com> ---
(In reply to comment #1)
> Can you please attach the Xorg.0.log? And in the meantime test with git for
> 
> commit c361b449cc3ec15819883afc220aad8823c0072d
> Author: Chris Wilson <chris at chris-wilson.co.uk>
> Date:   Tue Jul 2 09:49:48 2013 +0100
> 
>     sna: Include connector status in the initial probe
> ...

This one doesn't fix it. A new Xorg.0.log with access to /proc/cpuinfo will be
attached.

(In reply to comment #3)
> Unrelated to this bug: [    42.584] Unknown CPU cache size
> 
> I use /proc/cpuinfo to query the cache size. Is that not accessible on your
> system? Can you please attach it?

The X server runs in a chroot with a striped down /proc. I've added it now.
Does the lack of it result in any other drawbacks than lesser
optimizations/speed?

(In reply to comment #4)
> When you say stays black, do you mean that the kernel doesn't output
> anything to that pipe either?

The monitor switches from the power saving mode to "something connected". The
on-screen menu of the monitor states that the correct resolution is set. But,
it doesn't show anything than a black screen. 

> I think I need drm.debug=6 (i.e. append drm.debug=6 to your kernel
> commandline parameters in grub) dmesg from boot as well in this case.

Will be attached.

I've to revise my initial statement (the output at the last pipe stays black).
It doesn't seem to be "last pipe" related, because a monitor at the VGA port
works. X and kernel logs will be attached too.

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