After installing Ubuntu 12.04 on a Toshiba NB510 the screen resolution is 800x600 instead of the native 1024x600. This is a netbook that contains the infamous GMA3650 (aka PowerVR SGX5450) which is poorly supported by the Linux kernel. I've looked around and tried several different solutions. Namely:
- I've tried installing a newer kernel (3.3+), since some people have reported success with it. That didn't seem to fix the resolution problem.
- I've tried installing an older version of Ubuntu (10.04), since someone suggested there's an older driver that should provide basic support for the card, but the liveCD image wouldn't boot.
- I've tried using this ppa. On first reboot, the screen resolution was correct. Subsequent reboots lead to a blank screen immediately after grub.
- I've tried passing the kernel option
video=1024x600with the above PPA, to no avail.
- I've tried installing a daily build of Quantal. The live image boots with the correct resolution. The installed system boots to a blank screen. The
video=1024x600option doesn't work here either.
- On Quantal I've blacklisted the
gma500_gfxdriver to force the use of
vesa. This causes Ubuntu to boot into a 800x600 resolution.
After this, I've tried using the following
Section "Device" Identifier "card" Driver "vesa" EndSection Section "Monitor" Identifier "panel" Modeline "1024x600_DDC" 54.03 1024 1048 1184 1344 600 603 609 670 -hsync -vsync Option "PreferredMode" "1024x600_DDC" EndSection Section "Screen" Identifier "screen" Device "card" Monitor "panel" DefaultDepth 24 SubSection "Display" Depth 24 Modes "1024x600_DDC" EndSubSection EndSection
where the modeline comes from DDC, as reported in
/var/log/Xorg.0.log. This seems to have no effect, with the resolution stuck at 800x600.
- Additionally, adding
nomodesetto the kernel command line does not help with either the resolution problem or the blank-screen problem.
Ideally, since I don't think I can trust the
gma500_gfx driver or that from Meego (the one in Sarvatt's PPA), I would like to use the
vesa driver (probably reverting to 12.04), and specify the resolution in a
xorg.conf file, but I can't seem to get this to work. Any ideas?
BTW, this is a problem I'm helping a friend with, I don't have direct access to the machine.