Re: Upgrade Kernel, Lose External Display
On 06/12/2010 04:03 AM, Sven Joachim wrote:
This is to be expected, because it detects and uses the display's native
resolution. This is usually what you want, but you can override it with
the video=800x600 boot parameter (or whatever other resolution you like).
Looks like I have a bit of searching and reading to do. I have just been
blithely rolling along with all of the upgrades in Squeeze. Whereas I
would have had an idea of how to go about this with grub I notice that a
lot of things have changed between the changes in grub and the changes
in the way video is handled.
I booted the system connected to the port replicator and let it go to
the black screen. I logged on to it via ssh and got the output of
dmesg, which I'm attaching to this message as dmesg.txt.
Thanks. I don't see anything unusual in it, in particular nouveau
detects the 1680x1050 resolution of the external display:
[ 7.308183] [drm] nouveau 0000:01:00.0: allocated 1680x1050 fb: 0x49000, bo f6feb600
[ 7.319925] [drm] nouveau 0000:01:00.0: Output DVI-D-1 is running on CRTC 0 using output A
[ 7.319929] [drm] nouveau 0000:01:00.0: Setting dpms mode 0 on tmds encoder (output 2)
[ 7.319931] [drm] nouveau 0000:01:00.0: Output DVI-D-1 is running on CRTC 0 using output A
[ 7.321231] Console: switching to colour frame buffer device 210x65
Yes, I saw that and wondered why, if it's detecting the resolution
properly, it isn't working. I guess the new frame buffer must be
incompatible with the card's driver.
I tried this:
$ grep -B2 'Module class: X.Org Video Driver' /var/log/Xorg.0.log
(II) Module nv: vendor="X.Org Foundation"
compiled for 1.7.7, module version = 2.1.17
Module class: X.Org Video Driver
--
(II) Module vesa: vendor="X.Org Foundation"
compiled for 1.7.7, module version = 2.3.0
Module class: X.Org Video Driver
I'm not sure I understand what's going on here. Does that say I'm using
nv or vesa now?
Whichever one I'm using doesn't seem to like the change.
If you want to report a bug upstream, please see
http://nouveau.freedesktop.org/wiki/FrontPage#Bugs.
Cheers,
Sven
Yes, thank you, Sven. I think I will attempt to report a bug. I hope
they won't mind a bug report from a dumb ox.
I really appreciate your help.
Regards,
Gil
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