upgrade from 2.6.31-2.17 leads to heavy screen flickering e.g. in gnome-terminal

[DSHR]

Using a fully updates karmic on lenovo X60S mit kms enabled leads to screen flickering espacially noticable during scroll operations in gnome-terminal and firefox. Using 2.6.31-2 resolves the problem for me. Compiz effects are enabled.

# apt-cache policy linux-image-2.6.31-2-generic
linux-image-2.6.31-2-generic:
  Installiert: 2.6.31-2.17
  Kandidat: 2.6.31-2.17
  Versions-Tabelle:
 *** 2.6.31-2.17 0
        100 /var/lib/dpkg/status
# apt-cache policy linux-image-2.6.31-3-generic
linux-image-2.6.31-3-generic:
  Installiert: 2.6.31-3.19
  Kandidat: 2.6.31-3.19
  Versions-Tabelle:
 *** 2.6.31-3.19 0
        500 http://de.archive.ubuntu.com karmic/main Packages
        100 /var/lib/dpkg/status

[Matt Drake (mattduckman)]

I also experience this problem in the newest kernel, and can confirm that it's not present in kernel 2.6.31-2.17.

[DSHR (s-heuer)]

The new 2.6.31-4 Kernel does not solve the problem ...

$ apt-cache policy linux-image-2.6.31-4-generic
linux-image-2.6.31-4-generic:
  Installiert: 2.6.31-4.22
  Kandidat: 2.6.31-4.22
  Versions-Tabelle:
 *** 2.6.31-4.22 0
        500 http://de.archive.ubuntu.com karmic/main Packages
        100 /var/lib/dpkg/status

[Matt Drake (mattduckman)]

Right, the problem still exists.
But I discovered that it's caused by KMS, so booting with 'nomodeset' in the kernel config line is a good workaround.

[DSHR (s-heuer)]

Still not fixed in 2.6.31-5 ...

I can switch from the default 85Hz refresh rate to 75Hz to fix the problem.

[DSHR (s-heuer)]

Fixed with 2.6.31-6. Thanks a lot!