Screen turns black when plugging in a second monitor
Solution 1
Just found the official bug page, with possible workarounds such as installing other kernel versions: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/745112
For the time being, it seems we have to wait or play with other kernels...
EDIT: I've just installed and tried kernel linux-headers-2.6.39-020639rc4
and works like a charm - at least in this regard. I hope it's as stable as the previous one as well!
Solution 2
Installing a new 2.6.39 kernel solved a problem in my case. Here are step by step instructions for less experienced users: http://blog.lome.pl/blog/ubuntu-11-4-black-screen-problem-solved/
Solution 3
I am running Ubuntu 11.04 with both a Nvidia and an integrated Intel AGP in my laptop.
I am using an external monitor connected through a mini DisplayPort wired to the Intel card. It has been working since I installed Ubuntu 11.04 a month a go, today the external monitor stopped responding:
- The external monitor reports no sync
- System > Preferences > Monitors reports the external monitor as attached and operational.
- Print Screen includes the image of the external monitor
- The laptop primary monitor works as expected.
After double checking the cables, connections and the external monitor I booted back in the previous Kernel (I suppose yesterday I got an kernel update) and the external monitor came back to life. I did the test forth an back a couple times and the behavior was consistent.
The offending Kernel is 2.6.38-11-generic.
Last known good Kernel is 2.6.38-10-generic.
So far I am sticking to the previous Kernel while using an external monitor.
Following are my graphics device info:
anibal@collar-de-bolas:~ $ lspci | grep -i VGA
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
01:00.0 VGA compatible controller: nVidia Corporation Device 0df4 (rev a1)
anibal@collar-de-bolas:~ $ sudo lshw -C video
[sudo] password for anibal:
*-display
description: VGA compatible controller
product: nVidia Corporation
vendor: nVidia Corporation
physical id: 0
bus info: pci@0000:01:00.0
version: a1
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress vga_controller bus_master cap_list rom
configuration: driver=nouveau latency=0
resources: irq:16 memory:f0000000-f0ffffff memory:c0000000-cfffffff memory:d0000000-d1ffffff ioport:3000(size=128) memory:f1000000-f107ffff
*-display
description: VGA compatible controller
product: 2nd Generation Core Processor Family Integrated Graphics Controller
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 09
width: 64 bits
clock: 33MHz
capabilities: msi pm vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:54 memory:f1400000-f17fffff memory:e0000000-efffffff ioport:4000(size=64)
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Comments
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gregghz over 1 year
I'm running 11.04 on a 2011 13" mackbook pro (intel hd 3000 gpu).
Previously everything had been fine, but today when I plug in an external monitor (17" Acer being plugged in via a mini display port to VGA adapter) the laptop immediately recognizes the monitor, but the screen turns black. It seems that everything is still responsive. I can see the cursor and I can see it change as it moves over things like text boxes or the edges of open windows. But even after unplugging the monitor, I can't get anything but a black screen until I restart gdm.
Yesterday I was using the laptop with a 22" Asus monitor using a mini display port to DVI adapter and everything was fine. This same monitor was also working fine last week when I was running OS X, and on an older HP laptop without an adapter (straight to VGA).
How can I fix this?
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Admin about 13 yearsFound any solution? Happening to me too in an Asus u35jc-a1, external monitor Samsung T220. At first I thought it was related to Unity, but it's happening in Gnome 2 as well.
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gregghz about 13 yearswhere did you get that kernel??
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gregghz about 13 yearsok, i found that kernel. I tried it and it works ... better .... it doesn't cause my main screen to go blank. But on the external monitor, it's completely black except for the unity panel thing (not sure what to call it) at the top and the cursor. (this kernel: kernel.ubuntu.com/~kernel-ppa/mainline/v2.6.39-rc4-natty)
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gregghz about 13 yearsthe kernel here: kernel.ubuntu.com/~kernel-ppa/mainline/drm-intel-next-proposed exhibits the same behavior as the one I previously mentioned.
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gregghz about 13 yearsas mentioned in the comments on Seb's answer, no dice. The laptop monitor works fine with the newer kernels, but the external one is still a black screen.
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blazej about 13 yearsDid you try the one from here: launchpad.net/~kernel-ppa/+archive/ppa/+packages ? It's 2.6.39-rc5 not 2.6.39-rc4 so maybe it will work better... and it actually did work for me.
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DK3 over 12 yearsJust filled a Kernel bug for this: bugs.launchpad.net/ubuntu/+source/linux/+bug/838181 please go an check it if it aplies to you.
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gregghz over 12 yearsBTW, everything is working fine now on a 3.0 kernel. I also had it working on a 2.39 kernel.