IMPOSSIBLE to use dual-monitors with Intel 945GM on linux ONLY?

pivotraze · 2011-08-29 06:53:03

I have an Intel 945GM Graphics card. Dual monitors works flawlessly on Windows, but on every version of linux, this happens (or something similar since it was Gnome 2 before hand)

Is there anything I can do to make it not so... well... unusable?

Thanks!

-Cody

eldragon · 2011-08-29 10:26:12

well, im using a 945gm myself with 2 screens..

how are you setting your dual desktop? cloned? stacked? next to each other? what resolution are both screens?

this hardware does not support texture sizes over 2048x2048, so you should consider this when setting your desktop configuration (gnome3 or compiz use textures to draw your desktop, so you need your desktop size to fit within that limit).

and of course, if you paste some logs....

pivotraze · 2011-08-29 22:35:22

Next to each other. The external monitor is 1920x1080 and the laptop is 1440x900. Does that mean I can not use these in combination with each other? What about with KDE4? Could dual-desktop with 1920x1080 and 1440x900 work fine?

davidgurvich · 2011-08-29 22:45:28

The graphics card should be able to handle those resolutions. I'm guessing the external monitor isn't being detected properly. Does the laptop screen work without any issues after connecting the external monitor?

pivotraze · 2011-08-29 22:58:14

No. As soon as it connects it does that, then goes normal, and then once I open a new tab or open activities it does that. As soon as I disconnect it, it's fine that

B-80 · 2011-08-30 03:59:30

Connect the laptop to the monitor and then post the output of:

dmesg

cat /var/log/Xorg.0.log

Shark · 2011-08-30 06:31:22

Plug in the external monitor and post the message of:

xrandr -q

Last edited by Shark (2011-08-30 06:32:37)

eldragon · 2011-08-30 10:32:09

davidgurvich wrote:

The graphics card should be able to handle those resolutions. I'm guessing the external monitor isn't being detected properly. Does the laptop screen work without any issues after connecting the external monitor?

no it does not handle those resolutions... not under a composited desktop.

try to set through xrandr one screen on top of the other one. (or use the gnome tool) so that you get a 1920x1980 virtual desktop instead.

pivotraze · 2011-10-20 05:23:41

@B-80 Will do later.
@Shark Will do Later
@eldragon That does seem to work, but it's really bothersome to have to move my mouse straight down to access laptop, and not to the right as I'm used to from Windows

eldragon · 2011-10-20 10:41:46

pivotraze wrote:

... and not to the right as I'm used to from Windows

explain further. what windows? as far as i know, the limitation is on the hardware, the OS shouldnt matter. of course you can use fallback mode (gnome) in landscape mode instead. that should work ok. (no compositing enabled).

or....

buy another notebook.

Last edited by eldragon (2011-10-20 10:48:30)

axujen · 2011-10-20 11:17:17

try to disable compositing first, i remember i had some weird things happen while i was trying to set up my external monitor with compositing on.
also did you set up an Xorg.conf ? if not check out this guide

giowck · 2011-10-20 11:30:18

try to change resolution, i had a similar issue. Every lcd monitor worked for me only with a specific resolution

Last edited by giowck (2011-10-20 11:30:54)

eldragon · 2011-10-20 16:46:55

from the horse's mouth: http://software.intel.com/en-us/article … ers-guide/

Max 3d texture
	

2048 x 2048 x 256

if you use compositing, limit your virtual desktop to that resolution.....or it will crash.

use whatever means that fits you.

i stacked my displays vertically
you could:
- stack them and live with the idea that down means right.
- reduce screen resolutions so that they fit.
- clone displays
- use a desktop environment without compositing.
- buy a new computer with a newer gpu which supports bigger texture sizes.

grayscale · 2012-02-09 09:48:54

I had the same problem, but found a workaround: https://bbs.archlinux.org/viewtopic.php … 6#p1055036

* downgrade to kernel 2.6.34
* disable composite

=> I can use my external monitor left/right of the internal (1920*1200 / 1280*800)

Arch Linux

#1 2011-08-29 06:53:03

IMPOSSIBLE to use dual-monitors with Intel 945GM on linux ONLY?

#2 2011-08-29 10:26:12

Re: IMPOSSIBLE to use dual-monitors with Intel 945GM on linux ONLY?

#3 2011-08-29 22:35:22

Re: IMPOSSIBLE to use dual-monitors with Intel 945GM on linux ONLY?

#4 2011-08-29 22:45:28

Re: IMPOSSIBLE to use dual-monitors with Intel 945GM on linux ONLY?

#5 2011-08-29 22:58:14

Re: IMPOSSIBLE to use dual-monitors with Intel 945GM on linux ONLY?

#6 2011-08-30 03:59:30

Re: IMPOSSIBLE to use dual-monitors with Intel 945GM on linux ONLY?

#7 2011-08-30 06:31:22

Re: IMPOSSIBLE to use dual-monitors with Intel 945GM on linux ONLY?

#8 2011-08-30 10:32:09

Re: IMPOSSIBLE to use dual-monitors with Intel 945GM on linux ONLY?

#9 2011-10-20 05:23:41

Re: IMPOSSIBLE to use dual-monitors with Intel 945GM on linux ONLY?

#10 2011-10-20 10:41:46

Re: IMPOSSIBLE to use dual-monitors with Intel 945GM on linux ONLY?

#11 2011-10-20 11:17:17

Re: IMPOSSIBLE to use dual-monitors with Intel 945GM on linux ONLY?

#12 2011-10-20 11:30:18

Re: IMPOSSIBLE to use dual-monitors with Intel 945GM on linux ONLY?

#13 2011-10-20 16:46:55

Re: IMPOSSIBLE to use dual-monitors with Intel 945GM on linux ONLY?

#14 2012-02-09 09:48:54

Re: IMPOSSIBLE to use dual-monitors with Intel 945GM on linux ONLY?

Board footer