monitor does not accept hdmi

[Alexander Bürger]

Binary package hint: xserver-xorg-video-intel

When I attach my LCD to my laptop with an HDMI cable, the monitor wakes up, the new screen is also added to the left of my laptop screen with the full resolution, but the screen stays black. Even the backlight is not turned on. With the VGA cable it works, but it's quite blurred (Full HD). Apparently the monitor does not "like" the HDMI output from the Linux driver. Is there anything I can do to get it working with the HDMI cable?

With Win7 it also works with the HDMI cable. There the intel driver calls the monitor "TV".

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: xserver-xorg-video-intel 2:2.9.1-3ubuntu5
ProcVersionSignature: Ubuntu 2.6.32-21.32-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-21-generic x86_64
Architecture: amd64
Date: Wed Apr 28 21:27:44 2010
DkmsStatus: Error: [Errno 2] No such file or directory
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Beta amd64 (20100406.1)
MachineType: Acer Aspire 1810T
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-21-generic root=UUID=fce23345-7943-4b9c-b91a-d57e01e7a0cd ro quiet splash
ProcEnviron:
 PATH=(custom, user)
 LANG=de_DE.UTF-8
 LC_MESSAGES=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: xserver-xorg-video-intel
dmi.bios.date: 09/24/2009
dmi.bios.vendor: INSYDE
dmi.bios.version: v1.3303
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: Base Board Product Name
dmi.board.vendor: Acer
dmi.board.version: Base Board Version
dmi.chassis.type: 1
dmi.chassis.vendor: Chassis Manufacturer
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnINSYDE:bvrv1.3303:bd09/24/2009:svnAcer:pnAspire1810T:pvrv1.3303:rvnAcer:rnBaseBoardProductName:rvrBaseBoardVersion:cvnChassisManufacturer:ct1:cvrChassisVersion:
dmi.product.name: Aspire 1810T
dmi.product.version: v1.3303
dmi.sys.vendor: Acer
glxinfo: Error: [Errno 2] No such file or directory
system:
 distro: Ubuntu
 codename: lucid
 architecture: x86_64
 kernel: 2.6.32-21-generic

[Alexander Bürger (acfb)]

Using xorg-edgers does not help, then X crashes as soon as the external monitor is turned on.

[Bryce Harrington (bryce)]

[outputs setup is done by the kernel now days]

[Alexander Bürger (acfb)]

I tried with the default x server and the 2.6.34 kernel as the only package from xorg-edgers. That did not improve things.

I noticed that there is only one entry in /sys/class/backlight/ which is called acpi_video0 and this apparently controls only the backlight of the built-in laptop monitor.

When booting with the HDMI cable connected, the Xorg.0.log says:

(II) intel(0): EDID for output HDMI1 ...
(II) intel(0): DPMS capabilities: Off

What does this "Off" mean? For the internal screen it says:

(II) intel(0): EDID for output LVDS1 ...
(II) intel(0): No DPMS capabilities specified

[Alexander Bürger (acfb)]

A slightly different subject: the resolution chosen if I boot with the monitor connected (whether the VGA or the HDMI connector does not make a difference) is 800x600, although the external screen has 1920x1080 and the laptop 1366x768. This is also written in the Xorg.0.log:

(II) intel(0): Using fuzzy aspect match for initial modes
(II) intel(0): Output LVDS1 using initial mode 800x600
(II) intel(0): Output HDMI1 using initial mode 800x600

So both monitors are 16:9 and this fuzzy (funny?) algorithm finds a 4:3 mode...

[Jeremy Foshee (jeremyfoshee)]

Hi Alexander,

If you could also please test the latest upstream kernel available that would be great. It will allow additional upstream developers to examine the issue. Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Once you've tested the upstream kernel, please remove the 'needs-upstream-testing' tag. This can be done by clicking on the yellow pencil icon next to the tag located at the bottom of the bug description and deleting the 'needs-upstream-testing' text. Please let us know your results.

Thanks in advance.

    [This is an automated message. Apologies if it has reached you inappropriately; please just reply to this message indicating so.]

[Alexander Bürger (acfb)]

Hi,

I tried the kernel (only the kernel) from xorg-edgers, but that does not improve things:
Linux xenon 2.6.34-1-generic #4~oga1-Ubuntu SMP Thu Apr 22 23:58:02 UTC 2010 x86_64 GNU/Linux

I have no sound over HDMI either. I get this message in dmesg:
HDMI hot plug event: Presence_Detect=1 ELD_Valid=0
I though that maybe sound and video interfere, so I blacklisted the snd_hda_codec_intelhdmi module, but it did not help for the video either.

I tried the ppa-mainline kernel linux-image-2.6.34-020634rc5-generic_2.6.34-020634rc5_amd64.deb: no progress.

While rebooting I noticed that grub is shown on the external monitor with the HDMI cable, and also the cursor is blinking there for a while. Then the screens start flickering a bit and the external display turns black. So I removed the ^plymouth-* packages (not plymouth and libplymouth) hoping to see more. When booting, initially the external screen shows a blinking cursor while the internal display is black. Then something switches to the internal screen and the external one is black. There are a few message lines flashing up on the internal screen, something about fsck, before X/gdm starts. I do not know if that is useful information. I could also try using the vesa driver (removing the xorg-server-video-intel driver).

Best regards,

Alexander

[Alexander Bürger (acfb)]

With the VESA driver it did not work; it does not seem to support randr.
I also tried karmic from the iso: no success (sound does not work either).
I attached the output of xrandr --prop with the HDMI cable connected. There is no backlight option for the external monitor.

[Alexander Bürger (acfb)]

I tried again, using the final 2.6.34 kernel from
 http://kernel.ubuntu.com/~kernel-ppa/mainline/v2.6.34-lucid/
and the intel driver 2.11 from ppa:glasen/intel-driver (with libdrm from ppa:glasen/libdrm).

The backlight of the screen is still off with the HDMI connection.

[Jeremy Foshee (jeremyfoshee)]

This bug report was marked as Incomplete and has not had any updated comments for quite some time. As a result this bug is being closed. Please reopen if this is still an issue in the current Ubuntu development release http://cdimage.ubuntu.com/daily-live/current/ . Also, please be sure to provide any requested information that may have been missing. To reopen the bug, click on the current status under the Status column and change the status back to "New". Thanks.

[This is an automated message. Apologies if it has reached you inappropriately; please just reply to this message indicating so.]

[Alexander Bürger (acfb)]

I tried 10.10 but it is unusable (network manager stops working after resume, gtk forgets theme after resume, twinkle has huge memory leak although it is the same package version as in 10.04 [it is the only SIP VoIP program I can get to work]) and my display problem is not solved either. So I switched back to 10.04.

In https://bugs.freedesktop.org/show_bug.cgi?id=29767 (see comments 6 and 5) there is a patch to the intel gpu drivers in the kernel which make at least the video output on the HDMI monitor work. I think it is more a workaround than a solution: audio must be disabled (see comment 6) although the monitor has audio support, otherwise the screen stays black.