I've been helping someone set-up a Linux laptop upon which I installed Debian 9 "Stretch".
The laptop is a Toshiba Satellite CH50-D11Q which has a GPU installed - an ATI Radeon 7000 HD series. I selected the MATE desktop and the default install used the opensource ATI drivers - however while the system was usable the screen brightness did not work correctly. When I realized that an ATI Radeon GPU was present I then installed the linux-firmware-nonfree package thinking that it would unlock the full power of the GPU. On reboot however we found that although the screen brightness could now be controlled, the graphical desktop was slower than the opensource drivers. Moving windows shows a visible re-draw and using a browser scrolling web pages seems to be slow. After some Googling, I tried instead to install the ATI "Catalyst" Linux package from the ATI site but on running it reported my X.org server version to be too old. I then attempted to downgrade to the opensource drivers by uninstalling the Xorg packages with "radeon" in their names but this wanted to uninstall ALL ox Xorg. Since the laptop user is non-technical, I did not want to proceed further with the fear that they may end up with a broken system. Can anyone suggest a way to downgrade cleanly? It sounds like I might need to install the opensource ATI/Radeon package which might have been uninstalled when I installed the nonfree one? Thanks -- Please post to: [email protected] Web Interface: https://mailman.lug.org.uk/mailman/listinfo/hampshire LUG URL: http://www.hantslug.org.uk --------------------------------------------------------------
