On my Dell M6700 laptop with an AMD Radeon HD 7870M video card I am unable to get 3d support with 3 displays on Ubuntu 12.04.02 (LTS)
With the open source Radeon Driver I can get 3 displays working but no unity 3d support.
With the Proprietary drivers, event the latest 13.4 directly from AMD, I can get 2 displays working, but if I add a third, I get various CRTC errors.
going to xrandr, these errors seem to be associated with enabling crtc 2.
IE:
$ lspci -nn | grep VGA 01:00.0 VGA compatible controller [0300]: Advanced Micro Devices [AMD] nee ATI Device [1002:6825] $ xrandr --verbose --fb 6016x1152 --output LVDS --auto --output DFP5 --auto --right-of LVDS --output DFP9 --auto --right-of DFP5 screen 0: 6016x1152 1592x305 mm 95.94dpi crtc 0: 2048x1152 59.9 +1920+0 "DFP5" crtc 1: 2048x1152 59.9 +3968+0 "DFP9" crtc 2: 1920x1080 60.0 +0+0 "LVDS" xrandr: Configure crtc 2 failed crtc 0: disable crtc 1: disable crtc 2: disable crtc 3: disable crtc 4: disable crtc 5: disable screen 0: revert crtc 0: revert crtc 1: revert crtc 2: revert crtc 3: revert crtc 4: revert crtc 5: revert $ fglrxinfo display: :0 screen: 0 OpenGL vendor string: Advanced Micro Devices, Inc. OpenGL renderer string: AMD Radeon HD 7800M Series OpenGL version string: 4.2.12217 Compatibility Profile Context FireGL 12.104
Everything I read says it should be possible with this version of the catalyst drivers (currently 13.4) and linux. And the card supports Eyefinity. (6 displays)
I've tried various outputs with display-port and not, and still no luck.
Does anyone know if a newer version of the radeon driver supports 3d on this card? Or if there is some way to enable crtc 2 in the fglrx driver for without getting the configuration error?
When I use amdcccle to configure 3 or more monitors it ends up giving a generic not enough memory or unable to enable display error. I think this is directly related to the xrandr: Configure crtc 2 failed.
Depending on the configuration I get many different CRTC errors on bootup. 147,148,149 seem the most common.
current xrandr -q shows the following
$ xrandr-q Screen 0: minimum 320 x 200, current 4096 x 1152, maximum 6016 x 2048 LVDS connected (normal left inverted right x axis y axis) 1920x1080 60.0 + ... DFP1 disconnected (normal left inverted right x axis y axis) DFP2 disconnected (normal left inverted right x axis y axis) DFP3 disconnected (normal left inverted right x axis y axis) DFP4 disconnected (normal left inverted right x axis y axis) DFP5 connected 2048x1152+0+0 (normal left inverted right x axis y axis) 510mm x 287mm 2048x1152 59.9*+ ... DFP6 disconnected (normal left inverted right x axis y axis) DFP7 disconnected (normal left inverted right x axis y axis) DFP8 disconnected (normal left inverted right x axis y axis) DFP9 connected 2048x1152+2048+0 (normal left inverted right x axis y axis) 510mm x 287mm 2048x1152 59.9*+ ... DFP10 disconnected (normal left inverted right x axis y axis) DFP11 disconnected (normal left inverted right x axis y axis) DFP12 disconnected (normal left inverted right x axis y axis) CRT1 disconnected (normal left inverted right x axis y axis)
This basically confirms my virtual screen size is large enough, and the displays are available.
