Thank you, Ha Thanh. But I found an alternative way before you posted to turn off the kernel-mode-setting
>From http://www.ubuntu.com/getubuntu/releasenotes/1004 "Working around bugs in the new kernel video architecture Ubuntu 10.04 LTS enables the new kernel-mode-setting (KMS) technology by default on most common video chipsets. While this is a major step forward for the graphics architecture in Ubuntu, in some rare cases KMS will prevent your video output from working correctly, or from working at all. If you need to disable KMS, you can do so by booting with the nomodeset option. You can also save this setting so that it's applied at every boot by adding it to your grub config (for GRUB 2: edit /etc/default/grub and add nomodeset to GRUB_CMDLINE_LINUX, then run sudo update-grub; for GRUB 1: edit /boot/grub/menu.lst and add nomodeset to the line beginning with # kopt=, then run sudo update-grub). (533784, 541501)" Thank you again, Ha Thanh. So, what doers turning KMS off mean? What will happens to anything that demands high video usage (like video games or editing video files)? -- [G33] CRT monitor no signal https://bugs.launchpad.net/bugs/545952 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs