Oliver Elphick composed on 2016-03-21 22:56 (UTC):
On Mon, 2016-03-21 at 17:27 -0400, Felix Miata wrote:
Oliver Elphick composed on 2016-03-21 21:01 (UTC):
> I have two monitors; the second one sometimes comes to life but is
> usually blank. However, the system thinks that it is active and
> displaying.
Which Debian?
MATE testing
# cat /etc/debian_version
stretch/sid
(up to date)
What gfxchip powers your displays?
Card: Nvidia
01:00.0 VGA compatible controller: NVIDIA Corporation GT218 [NVS 300]
(rev a2)
(I hope that is an answer!)
According to the log, you have both NVidia and Intel gfx hardware, which to
me means you're probably using a laptop, making my help available to you very
limited. AFAIK, those two together are a special hybrid that for optimal use
requires a special driver, either Bumblebee, or Prime, depending on whether
you want a FOSS solution (latter), or a proprietary one (former).
Is it actually a PC with a separate NVidia card in a PCIe slot? If yes, are
the cables actually both DisplayPort cables? Sometimes the logs identify
connections differently from the actual physics. I've often seen physical DVI
connectors identified as HDMI with Intel gfx hardware.
Maybe you hit a known bug, such as:
https://bugzilla.kernel.org/show_bug.cgi?id=94171
It is not the same chipset as reported in that bug, and I don't know
what I'm doing well enough to play with randr at the moment.
Show us Xorg.0.log and .xsession-errors and maybe we can help.
.xsession-errors does not exist, so far as I can see. As far as the
system is concerned, it doesn't think that there is any error.
Xorg.0.log attached. Both monitors are recognised.
Thanks for any suggestions.
First, ensure the display itself is not a problem by trying two things if you
haven't already:
1-boot the computer with the 1920x1200 display powered off
2-if the cables are twins, boot the computer with the cables switched, so
that the smaller is primary rather than the larger
Docs for solving such problems as yours are usually very good on Arch, so you
might wish to look at https://wiki.archlinux.org/index.php/PRIME if nothing
yet tried helps. Another place to look for video-focused help is:
https://lists.x.org/mailman/listinfo/xorg
--
"The wise are known for their understanding, and pleasant
words are persuasive." Proverbs 16:21 (New Living Translation)
Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!
Felix Miata *** http://fm.no-ip.com/
