Public bug reported:

Synopsis: I get "No Signal" and an otherwise blank screen when
connecting my Dell XPS 14" Ultrabook running 12.10 to Optoma HD20
projectors (we have two). The projector is recognized as connected. This
laptop correctly displays on at least 5 other models of external
monitors and projectors over HDMI without issue. Several Macs are known
to work fine with these projectors.


Hardware Details:
The laptop is a Dell XPS Ultrabook (L421X) running 12.10. This laptop has Intel 
4000 and NVIDIA 630M graphics, and lsmod shows nouveau and i915 drivers loaded. 
This model has both HDMI and mini DisplayPort; results are identical for HDMI 
and the mini DP port (with miniDP-HDMI adapter).

The projector is the Optoma HD20. This projector has two HDMI inputs and
native 1920x1600 projection. We have two of them, and all behaviors
described here are identical for both of them.

snafu$ lsb_release -rd
Description:    Ubuntu 12.10
Release:        12.10

snafu$ apt-cache policy xorg
xorg:
  Installed: 1:7.7+1ubuntu4
  Candidate: 1:7.7+1ubuntu4
  Version table:
 *** 1:7.7+1ubuntu4 0
        500 http://us.archive.ubuntu.com/ubuntu/ quantal/main amd64 Packages
        100 /var/lib/dpkg/status


What I've tried:

When I plug the projector into my laptop, the projector is recognized
quickly as OTM 72" in Settings > Displays, but the projector declares
"No Signal" and has blank display. (Is OTM 72" right?) Xorg.0.log shows
frame buffer allocations that seem sensible based on laptop and selected
projector resolutions. Clicking "Apply" leads to the 30s timeout dialog
in which the laptop display is fine (i.e., not garbled) but the
projector says "no signal".

Both projectors work fine with Macs.

I have tried multiple cable and cable lengths.

I have tried multiple resolutions, with and without mirroring.

http://harts.net/reece/tmp/optoma-hd20.edid-decode contains the edid
info generated by edid-decode
/sys/devices/pci0000\:00/0000\:00\:02.0/drm/card0/card0-HDMI-A-1/edid .

12.04.1 LTS behaves similarly.

Rebooting with the projector connected has the same effect.

I've tried the xrandr and gtf suggestions at
http://askubuntu.com/questions/216075/no-hdmi-output-on-12-10-intel-hd-
graphics-ironlake/249593#249593 without success.


Not sure if this is helpful:
snafu$ xrandr -q
Screen 0: minimum 320 x 200, current 3520 x 1080, maximum 8192 x 8192
LVDS1 connected 1600x900+0+0 (normal left inverted right x axis y axis) 309mm x 
174mm
   1600x900       60.0*+   40.0  
   1440x900       59.9  
   1360x768       59.8     60.0  
   1152x864       60.0  
   1024x768       60.0  
   800x600        60.3     56.2  
   640x480        59.9  
VGA1 disconnected (normal left inverted right x axis y axis)
HDMI1 connected 1920x1080+1600+0 (normal left inverted right x axis y axis) 
708mm x 398mm
   1920x1080      60.0*+   50.0     30.0     25.0     24.0     30.0     25.0  
   1600x1200      60.0  
   1680x1050      59.9  
   1680x945       60.0  
(clipped)

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: xorg 1:7.7+1ubuntu4
ProcVersionSignature: Ubuntu 3.5.0-22.34-generic 3.5.7.2
Uname: Linux 3.5.0-22-generic x86_64
.tmp.unity.support.test.0:
 
ApportVersion: 2.6.1-0ubuntu10
Architecture: amd64
CompizPlugins: 
[core,composite,opengl,compiztoolbox,decor,imgpng,mousepoll,snap,resize,move,grid,unitymtgrabhandles,place,regex,gnomecompat,vpswitch,animation,expo,workarounds,ezoom,wall,session,fade,scale,unityshell]
CompositorRunning: compiz
Date: Fri Feb  1 12:10:49 2013
DistUpgraded: 2012-10-25 06:04:30,095 DEBUG enabling apt cron job
DistroCodename: quantal
DistroVariant: ubuntu
DkmsStatus:
 vboxhost, 4.2.6, 3.5.0-21-generic, x86_64: installed
 vboxhost, 4.2.6, 3.5.0-22-generic, x86_64: installed
GraphicsCard:
 Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 
09) (prog-if 00 [VGA controller])
   Subsystem: Dell Device [1028:054d]
   Subsystem: Dell Device [1028:054d]
InstallationDate: Installed on 2012-10-09 (114 days ago)
InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 
(20120823.1)
MachineType: Dell Inc. XPS L421X
MarkForUpload: True
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-22-generic 
root=UUID=b19be1d6-88a8-4b04-862d-65a6cce9e6ee ro quiet splash vt.handoff=7
SourcePackage: xorg
UpgradeStatus: Upgraded to quantal on 2012-10-25 (99 days ago)
dmi.bios.date: 06/26/2012
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A04
dmi.board.name: 08HDPJ
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: A04
dmi.modalias: 
dmi:bvnDellInc.:bvrA04:bd06/26/2012:svnDellInc.:pnXPSL421X:pvrA04:rvnDellInc.:rn08HDPJ:rvrA00:cvnDellInc.:ct8:cvrA04:
dmi.product.name: XPS L421X
dmi.product.version: A04
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.8.6-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.39-0ubuntu1.0~ppa1.1
version.libgl1-mesa-dri: libgl1-mesa-dri 9.0-0ubuntu1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.0-0ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.13.0-0ubuntu6.1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 
1:6.99.99~git20120913.8637f772-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.20.9-0ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.2-0ubuntu3

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug compiz-0.9 quantal running-unity ubuntu

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https://bugs.launchpad.net/bugs/1112859

Title:
  Optoma HD20 projector recognized but no HDMI signal

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