I have recently installed Ubuntu on my Toshiba Satellite A25-S207 Laptop. Everything runs great except that the resolution will not go above 800x600.
I had this problem before on the same laptop and was able to fix it but cannot find the fix now (I had to wipe my laptop clean in order to remove some pesky Windows partitions and reinstall Ubuntu)
I have found several "fixes" but none work. I tried the one below as well as it applies almost perfectly to my problem
"I just installed the latest ubuntu 10.04 on a Toshiba-Tecra having "Trident Microsystems Cyberblade XP4m32" Monitor. After install resolution is defaulted to 800x600. I followed a method advised in some threads (arount xrandr and cvt) to increase the size (my laptop works with 1024x768 under XP). This was done OK and I obtained the resolution 1024X768 appearing in the drop list resolution options of the Monitor preferences but when I select the option if fails. Alternatively, when I execute
$ xrandr --output default --mode 1024x768_60.00
i got the message "xrandr : screen cannot be larger than 800x600 (desired size 1024X768)
I also saw a possible fix proposing to add "HorizSync 31.50-48.00" in Xorg.conf but I then I DO NOT have such a file in my /etc/x11/ after ubuntu install (supposing that this will fix my problem !!!)
Thanks to help me to progress
Boot into recovery mode, when you get to the command line type:
sudo Xorg -configurewhich will create a default /etc/X11/xorg.conf file. Add the lines:
HorizSync 31.0 - 70.0
VertRefresh 40.0 - 75.0to the Monitor section then reboot."
However when I entered the "sudo Xorg -configure" line my computer spit back saying that "sudo" is not an acceptable command
How can I fix this? It's very annoying.