I have an old laptop with a ATI Mobility Radeon 45xx. I used to run Kubuntu 12.04 and I decided to do a dist-upgrade, although that unfortunately killed the ATI driver (as I understand, ATI does not support it anymore) and I was back to the open source fglrx driver. Now I wouldn't care as I don't use this laptop for anything other than coding, however it would not set my resolution higher than 1024x768 on a 1366x768 screen which was a no-go for me.
So I decided to follow a guide which suggested using an old ATI driver and which apparently worked for many users. When I installed, X would not start at all.
I decided to download Ubuntu 13.04 and it surprisingly not only gave me the desired resolution but also a very working compiz. So my question is, how is it that being the same OS, KDE does not work with it. I mean, it would not be affected by the DE at all. The only thing I can however think of is the update manager I used which removed all obsolete packages in the dist-upgrade where it might have removed some ATI binary. I would like to switch to KDE again and remove Unity. But what I want to make sure is that it does not do the same thing again with 13.10.
Any idea what is going on here?
root@FatalException:~# lshw -c video *-display
description: VGA compatible controller
product: RV710/M92 [Mobility Radeon HD 4530/4570/545v]
vendor: Advanced Micro Devices [AMD] nee ATI
physical id: 0
bus info: pci@0000:01:00.0
width: 32 bits
capabilities: pm pciexpress msi vga_controller bus_master cap_list rom
configuration: driver=radeon latency=0
resources: irq:48 memory:d0000000-dfffffff ioport:2000(size=256) memory:fc000000-fc00ffff memory:fc020000-fc03ffff
root@FatalException:~# lspci | grep VGA
01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI RV710/M92 [Mobility Radeon HD 4530/4570/545v]