I have Dell Mini 1010 with GMA 500 chipset. I installed the Ubuntu 12.04 and followed instructions for sorting out distorted display/blank screen.
I am stuck with the 1024x576 screen display now.
The supported resolution for notebook is apparently 1366x768.
I have tried modifing the GRUB_GFXPAYLOAD_LINUX and GRUB_GFXMODE to 1366x768x32 ( as per wiki) but it is not resolving the issue.
Can you please suggest any alternatives to fix this thing ?