Display problems after Ubuntu is upgraded to 10.04

After Ubuntu is upgraded from 9.10 to 10.04, it is found that the screen is full-screen and transient striped. After some tossing, it was found that it was a problem with KMS. Ubuntu10.04 enabled KMS on Kernel 2.6.32 by default, so this problem occurs, and everything will be normal after 2.6.31 is selected as the boot option. After searching, ubuntuwiki has an introduction. After KMS is disabled, my video card is ninehills @ localhost :~ $ Lspci-nn |

After Ubuntu is upgraded from 9.10 to 10.04, it is found that the screen is full-screen and transient striped.

After some tossing, it was found that it was a problem with KMS. Ubuntu10.04 enabled KMS on Kernel 2.6.32 by default, so this problem occurs, and everything will be normal after 2.6.31 is selected as the boot option.

After searching, ubuntuwiki has an introduction. (Attached)

After KMS is disabled, everything works normally, and my video card is:

Ninehills @ localhost :~ $ Lspci-nn | grep VGA
. 0 VGA compatible controller [0300]: ATI Technologies Inc RV515 [Radeon Mobility X1450] [1002: 7186]

Not recommended

Appendix:
X/KernelModeSetting
Kernel mode-setting (KMS) shifts responsibility for selecting and setting up the graphics mode from X.org to the kernel. when X.org is started, it then detects and uses the mode without any further mode changes. this promises to make booting faster, more graphical, and less flickery.

Using ing KMS on Lucid
By default, KMS is enabled by default for the-intel,-ati, and-nouveau drivers. It is not available for any other drivers at this time.

If you need to turn KMS * off * (I personally had to do it for Radeon Mobility X1400 and X1600), set modeset = 0 for your kernel driver:

# ATI Radeon: echo options radeon modeset = 0>/etc/modprobe. d/radeon-kms.conf # Intel: (Note-see below) echo options i915 modeset = 0>/etc/modprobe. d/i915-kms.conf
The Nouveau video driver does not support non-KMS mode, instead you will need to install and use the xserver-xorg-video-nv driver.

The Intel video X driver as of version 2.9.1-1ubuntu4 has been compiled as KMS-only; if you need to turn off KMS on-intel, you must use an earlier version than this. such a version is available from the x-retro PPA.