I've been running 12.04 on a NVidia GPU. I attempted to install ATI's proprietary catalyst drivers and a second GPU. Now the X-desktop will not start.
- How do I refresh the borked desktop?
- Can NVidia and ATI's HD series coexist?
"Will not start" may be a misnomer. The background comes up but the (taskbar?) on the left doesn't come up and the icons on the desktop can't be clicked. After a timeout I get a password request but then the desktop no longer shows.
I found a message from modem-manager trying to start saying it can't find /var/run/dbus/system_bus_socket. That may or may not be helpful
03:00.0 VGA compatible controller : NVIDIA Corporation GK106 [GeForce GTX 650 Ti] [10de:11c6] (rev a1) Subsystem: eVga.com. Corp. Device [3842:3650] Kernel driver in use: nvidia Kernel modules: nvidia_319_updates, nvidia_304, nvidia_304_updates, nouveau, ? nvidiafb
03:00.1 Audio device : NVIDIA Corporation GK106 HDMI Audio Controller [10de:0e0b] (rev a1) Subsystem: eVga.com. Corp. Device [3842:3650]
06:00.0 VGA compatible controller : Advanced Micro Devices, Inc. [AMD/ATI] Cedar [Radeon HD 5000/6000/7350/8350 Series] [1002:68f9] Subsystem: Hightech Information System Ltd. Device [1787:2291] Kernel modules: radeon 06:00.1 Audio device : Advanced Micro Devices, Inc. [AMD/ATI] Cedar HDMI Audio [Radeon HD 5400/6300 Series] [1002:aa68] Subsystem: Hightech Information System Ltd. Device [1787:aa68] Kernel driver in use: snd_hda_intel