Having installed Ubuntu 10.4 on my Vostro 3300, I hooked it up on my home made docking station… a belkin usb hub with wireless keyboard and mouse and a 20″ external monitor.
Everything seem to work ok – until I noticed that the monitor image was on a continuous flickering/wavy pattern. Searching on the web for similar problems, I found that the same issue had been found by several Vostro 3300 uses. I should note at this point that my laptop has an intel graphics card.
Most of the post suggested either to upgrade to a more recent kernel (Ubuntu 10.4 comes with 2.6.32-24) or to set modeset to 0. None of it worked.. I tried upgrading up to 2.6.36 and also booting the Maveric Beta from a CD with no success. I also figure out that you set modeset=0 by editing /etc/default/grub (sudo vi /etc/default/grub) and update the following line: GRUB_CMDLINE_LINUX=”i915.modeset=0 “. The run sudo update-grub and reboot.. unfortunately this frooze my laptop – so don’t bother trying 🙂
Eventually, I decided that I needed help, after asking around Sarvatt at freenode’s #Ubuntu-x found the upstream bug report that matches my issue – https://bugs.freedesktop.org/show_bug.cgi?id=28306
Unfortunately, this means that the issue is still unfixed and my monitor still flickering… Can you help? 🙂