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I've been looking for days to figure out what is going on but I am completely lost.

I am unable to control the screen settings on my external monitor (HDMI). The external display is not detected at all however I do get output from HDMI when I plug the cable in. So the HDMI output is certainly active I checked Settings->Display and only my laptop screen shows up. I would like to be able to control my external screen

My graphics card:

user@host:~$ lspci | grep 'VGA'
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)

I am currently using Ubuntu 12.04 LTS

some general outputs

user@host:~$ xrandr
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 1366 x 768, current 1366 x 768, maximum 1366 x 768
default connected 1366x768+0+0 0mm x 0mm
   1366x768        0.0*

user@host:~$ lspci
00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09)
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
00:16.0 Communication controller: Intel Corporation 7 Series/C210 Series Chipset Family MEI Controller #1 (rev 04)
00:1a.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #2 (rev 04)
00:1b.0 Audio device: Intel Corporation 7 Series/C210 Series Chipset Family High Definition Audio Controller (rev 04)
00:1c.0 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 1 (rev c4)
00:1c.1 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 2 (rev c4)
00:1c.2 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 3 (rev c4)
00:1d.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #1 (rev 04)
00:1f.0 ISA bridge: Intel Corporation 7 Series Chipset Family LPC Controller (rev 04)
00:1f.2 SATA controller: Intel Corporation 7 Series Chipset Family 6-port SATA Controller [AHCI mode] (rev 04)
00:1f.3 SMBus: Intel Corporation 7 Series/C210 Series Chipset Family SMBus Controller (rev 04)
00:1f.6 Signal processing controller: Intel Corporation 7 Series/C210 Series Chipset Family Thermal Management Controller (rev 04)
01:00.0 Network controller: Qualcomm Atheros AR9462 Wireless Network Adapter (rev 01)
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 05)
03:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS5209 PCI Express Card Reader (rev 01)

Things I've tried: running xrandr to set display to HDMI1, however HDMI is not detected and does not make a difference

Plugging HDMI in before booting machine, no change in behavior, HDMI output is active but still not detected

there does not appear to be an xorg.conf that I can edit either

Something werid: Under the "System Details" in the Graphics section, it lists the driver as "Unknown" and Experience "Standard" . I've also tried to reinstall all the intel xorg video drivers, still no change

Side note: My HDMI audio works perfectly

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Could you add the full output of lspci? And have you tried the xorg-edgers ppa yet? launchpad.net/~xorg-edgers/+archive/ppa –  Richard Sep 6 '13 at 0:45
    
i have added the lspci output, in the meantime i will look at the xorg-edgers ppa –  user190483 Sep 6 '13 at 0:51
    
Yeah, updating the kernel and Xorg might do something. You can also try a 13.04 or 13.10 live USB or DVD and see if that does anything. –  Richard Sep 6 '13 at 0:53
    
Is there a simple way to update the kernel and stay on 12.04? It appears my machine is not ready to use the Unity environment so I wont be able to upgrade further. –  user190483 Sep 6 '13 at 1:19
    
I was able to upgrade the kernel to 3.5 however there is no change to the external display behavior. –  user190483 Sep 6 '13 at 15:12
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1 Answer 1

Turns out the underlying issue was overwritten files in /usr/share/xorg.conf.d when applying a trackpad fix. found here: http://craigerrington.com/blog/fixing-touchpad-issues-on-arm-chromebook-chrubuntu/

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1  
So can you tell me what did you do to fix it? –  Shahensha Sep 7 '13 at 22:52
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