I believe this has something to do with the way AMD switchable graphics and X interact, and changes (fixes?) in the new driver.
I have a Samsung Chronos 7 with AMD Radeon HD 7400M Series I resolved it by doing 'aticonfig --px-igpu' in conjunction with using the fglrx device for my screen section in xorg.conf. I tried the other permutations, but there's either no acceleration, or no mouse: intel device in screen : aticonfig --px-dgpu [Mouse: yes Acceleration: no] intel device in screen : aticonfig --px-igpu [Mouse: yes Acceleration: no] fglrx device in screen : aticonfig --px-dgpu [Mouse: no Acceleration: yes] fglrx device in screen : aticonfig --px-igpu [Mouse: yes Acceleration: yes] !! Current /etc/X11/xorg.conf: Section "ServerLayout" Identifier "aticonfig Layout" Screen 0 "aticonfig-Screen[0]-0" 0 0 EndSection Section "Monitor" Identifier "aticonfig-Monitor[0]-0" Option "VendorName" "ATI Proprietary Driver" Option "ModelName" "Generic Autodetecting Monitor" Option "DPMS" "true" EndSection Section "Device" Identifier "aticonfig-Device[0]-0" Driver "intel" BusID "PCI:0:2:0" EndSection Section "Device" Identifier "aticonfig-Device[0]-1" Driver "fglrx" BusID "PCI:1:0:0" EndSection Section "Screen" Identifier "aticonfig-Screen[0]-0" Device "aticonfig-Device[0]-1" Monitor "aticonfig-Monitor[0]-0" DefaultDepth 24 SubSection "Display" Viewport 0 0 Depth 24 EndSubSection EndSection
