Display on HDMI port not detected on LEMU2

[distroslut]

This morning I found that my Lemur U2 running Ubuntu 12.10,with Kubuntu (package version 4:4.9.4-0ubuntu0.1) installed over the top, does not detect my Dell 1920x1200 external display which is connected to the HDMI port.

I have tried using a few different HDMI cables, a DVI cable with a DVI-HDMI adapter, and a different (but identical) monitor. No luck.

Below is the output of a few commands...

uname -a
Linux chandrasekhar 3.5.0-22-generic #34-Ubuntu SMP Tue Jan 8 21:47:00 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

xrandr -q
Screen 0: minimum 320 x 200, current 1920 x 1200, maximum 8192 x 8192
LVDS1 connected 1366x768+0+0 (normal left inverted right x axis y axis) 295mm x 166mm
1366x768 60.0*+
1360x768 59.8 60.0
1024x768 60.0
800x600 60.3 56.2
640x480 59.9
VGA1 connected 1920x1200+0+0 (normal left inverted right x axis y axis) 519mm x 324mm
1920x1200 60.0*+
1920x1080 60.0
1600x1200 60.0
1680x1050 60.0
1680x945 60.0
1400x1050 74.9 60.0
1600x900 60.0
1280x1024 75.0 60.0
1440x900 75.0 59.9
1280x960 60.0
1366x768 60.0
1360x768 60.0
1280x800 74.9 59.8
1152x864 75.0
1280x768 74.9 59.9
1024x768 75.1 70.1 60.0
1024x576 60.0
800x600 72.2 75.0 60.3 56.2
848x480 60.0
640x480 72.8 75.0 60.0
720x400 70.1

FTR, VGA out appears to be functioning normally.

Is there any other information that would be useful to post?

Thanks.

[isantop]

This morning I found that my Lemur U2 running Ubuntu 12.10,with Kubuntu (package version 4:4.9.4-0ubuntu0.1) installed over the top, does not detect my Dell 1920x1200 external display which is connected to the HDMI port.

I have tried using a few different HDMI cables, a DVI cable with a DVI-HDMI adapter, and a different (but identical) monitor. No luck.

Below is the output of a few commands...

uname -a
Linux chandrasekhar 3.5.0-22-generic #34-Ubuntu SMP Tue Jan 8 21:47:00 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

xrandr -q
Screen 0: minimum 320 x 200, current 1920 x 1200, maximum 8192 x 8192
LVDS1 connected 1366x768+0+0 (normal left inverted right x axis y axis) 295mm x 166mm
1366x768 60.0*+
1360x768 59.8 60.0
1024x768 60.0
800x600 60.3 56.2
640x480 59.9
VGA1 connected 1920x1200+0+0 (normal left inverted right x axis y axis) 519mm x 324mm
1920x1200 60.0*+
1920x1080 60.0
1600x1200 60.0
1680x1050 60.0
1680x945 60.0
1400x1050 74.9 60.0
1600x900 60.0
1280x1024 75.0 60.0
1440x900 75.0 59.9
1280x960 60.0
1366x768 60.0
1360x768 60.0
1280x800 74.9 59.8
1152x864 75.0
1280x768 74.9 59.9
1024x768 75.1 70.1 60.0
1024x576 60.0
800x600 72.2 75.0 60.3 56.2
848x480 60.0
640x480 72.8 75.0 60.0
720x400 70.1

FTR, VGA out appears to be functioning normally.

Is there any other information that would be useful to post?

Thanks.

How are you enabling the monitor? It's normal for it not to automatically come on.

[distroslut]

How are you enabling the monitor? It's normal for it not to automatically come on.

If I plug in the HDMI cable when I'm already logged into KDE, a dialog box pops up asking if I want to launch the "Configure Display" dialog. From this dialog I enable the HDMI output at the resolution and orientation I want and hit "Apply"...

ftp.ssec.wisc.edu:/pub/incoming/Configure_Display.png

If the HDMI cable is already connected when I log in, I launch the same "Configure Display" dialog using the KDE panel "Resize and Rotate" widget.

Ordinarily, along with "LVDS1" and "VGA1", "HDMI1" would appear as an option in the "Configure Display" dialog (albeit disbled) if the cable was connected. I would then select the resolution I wanted and hit "Apply". A countdown dialog would then appear asking if wanted to keep the new settings.

[distroslut]

An update to the previous post... I took the LemU2 home and connected it to a different (1680x1050) Dell monitor. This time I was successful. A screenie of the configure dialog showing the HDMI entry can be found at...

ftp.ssec.wisc.edu:/pub/incoming/Configure_Display_2.png

I'm not quite ready to call this one resolved, I've got a few things to check out first. Stay tuned.

[distroslut]

Display on original Dell monitor using HDMI now functioning normally. I wish I had some idea what caused the original problem. Oh well.