Andy, no flicker seen in the first 35 minutes of using your FBC disabled kernel on lucid.
dmesg |grep "Command line"
[ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-2.6.32-22-generic root=/dev/sda7
dmesg |grep "Linux version"
[ 0.000000] Linux version 2.6.32-22-generic (root@chloe) (gcc version 4.4.3 (Ubuntu 4.4.3-3ubuntu1) ) #34~lp538648v201005171834 SMP Mon May 17 17:55:25 UTC 2010 (Ubuntu 2.6.32-22.34~lp538648v201005171834-generic 2.6.32.11+drm33.2)
Andy, no flicker seen in the first 35 minutes of using your FBC disabled kernel on lucid. /boot/vmlinuz- 2.6.32- 22-generic root=/dev/sda7 1005171834 SMP Mon May 17 17:55:25 UTC 2010 (Ubuntu 2.6.32- 22.34~lp538648v 201005171834- generic 2.6.32.11+drm33.2)
dmesg |grep "Command line"
[ 0.000000] Command line: BOOT_IMAGE=
dmesg |grep "Linux version"
[ 0.000000] Linux version 2.6.32-22-generic (root@chloe) (gcc version 4.4.3 (Ubuntu 4.4.3-3ubuntu1) ) #34~lp538648v20