HDMI connection not working on Ubuntu 16.04 and GeForce GTX 960M

Bug #1574005 reported by ghi
62
This bug affects 11 people
Affects Status Importance Assigned to Milestone
xorg (Ubuntu)
Expired
Low
Unassigned

Bug Description

The bug is described in question #291879 . After upgrading to Ubuntu 16.04 the HDMI monitor is no longer detected.

Tags: bot-comment
Revision history for this message
Ubuntu Foundations Team Bug Bot (crichton) wrote :

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1574005/+editstatus and add the package name in the text box next to the word Package.

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

tags: added: bot-comment
ghi (lauchpad-p)
affects: ubuntu → xserver-xorg-video-nouveau (Ubuntu)
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Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in xserver-xorg-video-nouveau (Ubuntu):
status: New → Confirmed
Revision history for this message
Panayiotis-Dimitrios Paraskevopoulos (satrapes) wrote :

I have had some kind of success on this front. In order to get Lubuntu to boot and install I added nomodeset and idle=nomwait in the linux parameters in grub. I found here http://ubuntuforums.org/showthread.php?t=2042773 that nomodeset is the thing that is preventing the HDMI from working. I tried it (removing nomodeset but keeping idle=nomwait) and the first time I managed to boot and have the HDMI working perfectly. When I reboot though I had to reset the nomodeset parameter in order for me to be able to boot into Lubuntu again.

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matiaspar (matiaspar) wrote :

Same problem with a Notebook and intel graphics and the "nomodeset and idle=nomwait" option not working...

Revision history for this message
Jose Barakat (josebarakat) wrote :

Same problem in 16.04 with "Intel(R) Core(TM) i3-3110M CPU @ 2.40GHz" Lenovo Laptop. While HDMI cable is connected, TV shows "no signal".

Comfirming that:
- LG TV's HDMI ports work.
- HDMI cable works (under Win7).
- Laptop can detect active HDMI connection (through xrandr)

Terminal output:
~$ xrandr --verbose
http://pastebin.com/BMibevGY

~$ sudo get-edid | parse-edid
http://pastebin.com/DZxFZj9j

~$ aplay -l
http://pastebin.com/T5PQ8baN

Revision history for this message
penalvch (penalvch) wrote :

ghi, thank you for reporting this and helping make Ubuntu better.

Could you please run the following command once from a terminal by ensuring you have the package xdiagnose installed, and that you click the Yes button for attaching additional debugging information:
apport-collect -p xorg 1574005

When reporting xorg related bugs in the future, please do so via the above method. You can learn more about this functionality at https://wiki.ubuntu.com/ReportingBugs.

affects: xserver-xorg-video-nouveau (Ubuntu) → xorg (Ubuntu)
Changed in xorg (Ubuntu):
importance: Undecided → Low
status: Confirmed → Incomplete
Revision history for this message
Oliver (aunicorn) wrote :

In my case it helps to restart the service lightdm (sudo service lightdm restart) - this works around 50% of the time, but in some cases the system freezes afterwards and a hard reset has to be performed.

Another issue is that if the second monitor goes to sleep it is not waking up afterwards.

Revision history for this message
penalvch (penalvch) wrote :

Oliver (aunicorn), it will help immensely if you filed a new report with Ubuntu by ensuring you have the package xdiagnose installed, and that you click the Yes button for attaching additional debugging information running the following from a terminal:
ubuntu-bug xorg

Also, please feel free to subscribe me to it.

For more on why this is helpful, please see https://wiki.ubuntu.com/ReportingBugs.

Revision history for this message
Launchpad Janitor (janitor) wrote :

[Expired for xorg (Ubuntu) because there has been no activity for 60 days.]

Changed in xorg (Ubuntu):
status: Incomplete → Expired
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