Hello Mash,
Thanks for your input.
My GPU card is an ATI Radeon HD 4670
Code: Select all
$ lspci | grep VGA
01:00.0 VGA compatible controller: ATI Technologies Inc RV730XT [Radeon HD 4670]
And I use the default Ubuntu 10.04 video driver: xserver-xorg-video-radeon, I have also tried the driver from ati (catalyst 10.4) but it doesn't work properly, I will try the 10.5 version next month.
PS: Yes I know, Ubuntu Lucid 10.04 is not yet ready for some graphic cards (the free default video drivers)
An example here for ATI:
http://www.x.org/wiki/RadeonFeature
But I not sure this is the reason, because I didn't had this problem before (few weeks ago), with my Ubuntu 10.04 Lucid Linx.
So ???