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View Full Version : Ubuntu 14.04 (Gnome): Laptop Display Blank After Undocking



Paul_Fernandez
September 3rd, 2015, 02:10 AM
Hey guys, I hope I'm posting this in the right place. Apologies if I'm not.

I've been experiencing a really annoying issue with my recent Ubuntu Gnome 14.04 install. The OS is running on a Lenovo T440s. At the office I have a dock that connects to two monitors, one is connected through VGA and one is connected through DVI. So far, so good.

The problem starts when I put my laptop to sleep while it's docked and connected to these monitors. When I wake the laptop (by opening the lid), say once I get home, the laptop appears to power on but the display is completely blank. I cannot wake it by switching to the other tty sessions via ctrl+alt f1-6 or anything else.

I should add that this only seems to happen when transitioning to/from the docking station. If while using the laptop as a laptop, I put it to sleep, I can wake it without problems so long as it's still in laptop mode (i.e. undocked). If I use the laptop, put it to sleep, dock it, then press the power button, the monitors will be blank. It's only after I open the lid that I get a display on both monitors and the laptop screen.

I know that this question gets asked a lot, I know because I've read just about every one of those posts and failed in applying their fixes to my setup.
I'm willing to set up some sort of xrandr script that runs in cron or gets triggered by some acpi state change. I'm all ears!

Thanks in advance!