I recently upgraded my dual-boot HP laptop (dv7-3060us, 17.3" display) from ubuntu 12-4 to 12-10. After the upgrade, only three (3) resolutions are available (800x600, 1024x768, and 1152x864, all 4:3 resolutions), none of which are 16:9. Everything worked properly in 12-04. The display adapter is ATI Mobility Radeon HD 4530. Does anyone have any ideas/suggestions about how to correct this problem? Thanks.
Create the modeline with cvt
Create the new mode with xrandr
Take the modeline output from above and append it tot eh xrandr --newmode command. Note I had to drop the refresh rate "_60.00" from the new mode name for this to work. Without dropping the refresh rate the command refuse to work.
Check the new resolution mode was created
disconnected (normal left inverted right x axis y axis)
Add the mode to the config For me this step also switch the monitor straight to the new resolution mode
For persistence edit /usr/share/X11/xorg.conf.d/10-monitor.conf
Update it to read as follows, note I added two resolution modes. I used cvt both times to generate the modelines which I then manually addded to the config file (see those lines in blue):
Again I had to drop the refresh rates from the mode names, without dropping the refresh rates when rebooting I just received a black screen without a terminal, when dropping to the terminal I received errors related to parsing the monitor config.
Also check that the identifier in the screen section matches that shown in the xrandr output i.e. Screen 0: minimum 320 x 200, current....
Save the config from within vi [ESC] :wq! [Enter] and reboot
If anything goes awry on reboot simply drop to a terminal and remove the monitor config file
That thing where AMD no longer supports Radeon HD 4000 on X 1.13, I should think. unixmen.com may have a solution for you.