I've installed Ubuntu 12.04 on my laptop with integrated Intel graphics (Intel i5 460M CPU). The screen resolution is set to 1024×768 and can only be changed to 800×600, while my screen is 1366×768.
I have secondary NVIDIA graphics and Optimus installed and working. There's also a 1920×1080 display connected via HDMI which I'd like to configure for extended desktop (it's mirrored now). Disconnecting the external display doesn't solve the problem.
I've tried generating new xorg.conf with Xorg -configure but it failed with a following message:
Number of created screens does not match number of detected devices
It still had dropped a file called xorg.conf.new in my home directory. I've copied it to /etc/X11, but it didn't help.
Ubuntu 12.10 did run in 1366×768 with mirrored displays, but it switched to 1024×768 instantly after login.
Some info:
gronostaj@GBUNTU:~$ sudo xrandr
[sudo] password for gronostaj:
Screen 0: minimum 320 x 200, current 1024 x 768, maximum 8192 x 8192
LVDS1 connected 1024x768+0+0 (normal left inverted right x axis y axis) 344mm x 193mm
1366x768 60.0 +
1360x768 59.8 60.0
1024x768 60.0*
800x600 60.3 56.2
640x480 59.9
VGA1 disconnected (normal left inverted right x axis y axis)
HDMI1 connected 1024x768+0+0 (normal left inverted right x axis y axis) 521mm x 293mm
1920x1080 60.0 +
1600x1200 60.0
1680x1050 60.0
1280x1024 75.0 60.0
1440x900 75.0 59.9
1280x960 60.0
1152x864 75.0
1024x768 75.1 70.1 60.0*
832x624 74.6
800x600 72.2 75.0 60.3 56.2
720x480 59.9
640x480 72.8 75.0 66.7 60.0
720x400 70.1
DP1 disconnected (normal left inverted right x axis y axis)
Jockey doesn't detect any drivers that could be used, but it did on clean 12.04 install. After the first update there are no drivers available.
Do you guys have any idea how to get it working as it should?
Best Answer
Ok, so this seems obvious now as I've found the solution.
For some reason 12.04 couldn't find a 16:9 resolution that both screens could handle. 12.10 did work on the login screen, but not later - I still don't know why.
I've tried the daily build of 13.04 and it did work well with 1366x768 on both displays, so I decided to try setting up mirrored desktop. And it did work well.
The solution was to uncheck the "Mirror displays" box and now everything works perfectly on 12.04.