First of all, I was amazed how smoothly the upgrade went. (K)Ubuntu and I guess other distributions as well have gone quite a far way to become platforms for everybody — with a lot of software but even more tools, helpers and automatic background services — like the nice upgrade service.
There was only one problem I ran into and I want to share the solution.
I am running Kubuntu 10.04 (just upgraded today) on a Lenovo IBM ThinkPad R60 (Yes, one of those with both brands on them ;)) with an ATI Radeon X1400 graphics device. But since upgraded, my display started flickering — not permanently but unbearable.
The solution that worked for me (at least partially — see below — and this is of cause depending on the graphics device type) was to install the proprietary ATI drivers. I know, it is not a good solution, I do not like to use them neither and if anyone out there is reading this with a better solution in mind, let me know it!! 🙂
Edit 2011-02-14: Added a new post with an additional, alternative solution here.
So what you need to do is to get your favorite package management tool (e.g. Synaptic or KPackageKit) — just hit Alt+F2 and type “package” and pick KPackageKit from the list (it will ask you for the super user password). Then, search for “fglrx”. In KPackageKit, you will find a result titled “Video driver for the ATI graphics accelerator”, and something below the title like “fglrx – 2:8.723.1-0ubuntu3” but the version number should not matter. Click the arrow to the right, hit “Apply” and after rebooting, everything should perfectly without any configuration.
Good luck. 😉
Problems noticed so far: The driver causes “Segmentation Fault” error messages, e.g. when trying to open up the display settings. That’s ugly, I know. But you can read in several forum and blog posts, that the support for the former nicely working driver for the ATI X1400 has been discontinued since 10.04, hence, it’s just good luck that the fglrx works somehow — good to know *after* upgrading, right. But still, the flickering was unbearable for me, thus, I accept the issues for now. I will keep my eyes peeled hoping for a proper solution in the future.