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I have a new Lenovo Yoga 2 with Ubuntu 14.04. On every 3rd or 4th boot, the screen goes completely blank after the grub screen and the backlight seems to ramp up to maximum intensity (I see a faint growing white glow). I can hear the drums beat for the login, but nothing shows up on the screen. This seems to be random--I cannot figure out a way to bypass this without rebooting several times. It also seems to randomly happen while waking up from suspend.

I have the acpi_backlight = vendor in the grub boot line. This does not seem to make a difference as I get this random behaviour with and without the boot flag.

--prasanna

user285029
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4 Answers4

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I have the same on 14.04. On 13.10 it worked well. I can't fix it, but there is a little workaround. When screen goes black press the F9 key (switch the screen off), close the lid and don't move the laptop*. It will go to sleep. Then open it and wake it up by pressing any key. My Yoga 2 Pro wakes up with the screen working fine.

  • Y2P has a movement sensor, so if you move it when it goes to sleep it fail to do so.
Pete
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I have the same problem, also on 14.04 and I can't fix it either, but there is a simple work-around:

Just close the lid so the screen gets turned off and reopen it.

This seems to reset the graphic-card driver and the screen is working again (sometimes you have to do this several times to work).

I hope, I find out a cleaner solution, or a simpler workaround with just a Keyboard-shortcut to reset the graphic card driver

Community
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rubo77
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I had this issue in the beginning too, but it seems to be fixed in Ubuntu 14.04 by now.

My Kernel: uname -rp

 3.14.1-031401-generic i686
rubo77
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If your screen acts strange after suspend, it's usually enough to switch to console (Ctrl+Alt+F1) and back to graphics again (Alt+F7).

Eliah Kagan
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Jaap
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