Hi,I too had a similar problem. Max resolution is 1366x768 but Trisquel shows only 1024x768. Video card is ATI Mobile radeon 4570
$ lspci | grep 'VGA 'VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RV710/M92 [Mobility Radeon HD 4530/4570/545v]
Tried commenting blacklist radeon on /etc/modprobe.d/disable-radeon.conf. But problem not yet fixed.
Xorg log file http://pastebin.com/gzShtZB0 Any Solution Thank you Vishnu V
