I have a Dell Inspiron 5521 laptop with a Radeon HD 8730M videocard, running Ubuntu 14.04
However, when I use the X.Org X server open source drivers from xserver-xorg-video-ati, the computer uses Intel Ivybridge Mobile for graphics.
glxinfo
has the line: OpenGL renderer string: Mesa DRI Intel(R) Ivybridge Mobile x86/MMX/SSE2
.
lspci | grep -i radeon
gives the following result:
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Mars [Radeon HD 8730M] (rev ff)
When I use the fglrx proprietary drivers, the radeon card is used, but many other problems arise.
EDIT:
In /var/log/kern.log
are the following lines. The first three lines are shown on the screen when starting the computer.
Nov 10 18:41:05 Computosaur kernel: [ 6.679366] [drm:radeon_uvd_send_upll_ctlreq] *ERROR* Timeout setting UVD clocks!
Nov 10 18:41:05 Computosaur kernel: [ 6.679397] [drm:uvd_v1_0_ib_test] *ERROR* radeon: failed to raise UVD clocks (-110).
Nov 10 18:41:05 Computosaur kernel: [ 6.679425] [drm:radeon_ib_ring_tests] *ERROR* radeon: failed testing IB on ring 5 (-110).
Nov 10 18:41:05 Computosaur kernel: [ 6.679778] [drm] Radeon Display Connectors
Nov 10 18:41:05 Computosaur kernel: [ 6.685426] [drm] Internal thermal controller without fan control
Nov 10 18:41:05 Computosaur kernel: [ 6.685495] [drm] probing gen 2 caps for device 8086:151 = 261ac82/6
Nov 10 18:41:06 Computosaur kernel: [ 7.833374] [drm] radeon: dpm initialized
Nov 10 18:41:06 Computosaur kernel: [ 7.833454] radeon 0000:01:00.0: No connectors reported connected with modes
Nov 10 18:41:06 Computosaur kernel: [ 7.833456] [drm] Cannot find any crtc or sizes - going 1024x768
Nov 10 18:41:06 Computosaur kernel: [ 7.834861] [drm] fb mappable at 0xA1480000
Nov 10 18:41:06 Computosaur kernel: [ 7.834863] [drm] vram apper at 0xA0000000
Nov 10 18:41:06 Computosaur kernel: [ 7.834863] [drm] size 3145728
Nov 10 18:41:06 Computosaur kernel: [ 7.834864] [drm] fb depth is 24
Nov 10 18:41:06 Computosaur kernel: [ 7.834865] [drm] pitch is 4096
Nov 10 18:41:06 Computosaur kernel: [ 7.834944] radeon 0000:01:00.0: fb1: radeondrmfb frame buffer device
Nov 10 18:41:06 Computosaur kernel: [ 7.834957] [drm] Initialized radeon 2.36.0 20080528 for 0000:01:00.0 on minor 1