I have a Dell XPS15 l502x dual-booting Win8 and Ubuntu 12.04.
When I try to connect my second monitor through the HDMI port, the second monitor just says there's no signal.
When I run
lspci -v, I get the following:
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) (prog-if 00 [VGA controller]) Subsystem: Dell Device 04b6 Flags: bus master, fast devsel, latency 0, IRQ 50 Memory at f1400000 (64-bit, non-prefetchable) [size=4M] Memory at e0000000 (64-bit, prefetchable) [size=256M] I/O ports at 4000 [size=64] Expansion ROM at <unassigned> [disabled] Capabilities: <access denied> Kernel driver in use: i915 Kernel modules: i915
When I run
xrandr, I get:
Screen 0: minimum 320 x 200, current 1366 x 768, maximum 8192 x 8192
LVDS1 connected 1366x768+0+0 (normal left inverted right x axis y axis) 344mm x 194mm
1360x768 59.8 60.0
800x600 60.3 56.2
VGA1 disconnected (normal left inverted right x axis y axis)
HDMI1 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)
I have no clue how to enable my second monitor. I do have another NVIDIA graphics card:
01:00.0 VGA compatible controller: NVIDIA Corporation GF108 [GeForce GT 540M] (rev ff) (prog-if ff)
!!! Unknown header type 7f
in my laptop but I don't want to use it since the support for NVIDIA Optimus graphics cards is poor on Linux.
Can anyone suggest a fix for this? Thanks!