I've got a bit more info.
As you can also see in the 'mainline kernel install log' attachment,
since this same update, I also have a graphics driver problem: no more
opengl/hardware accelleration, with all of the 3 driver options (fglrx,
fglrx-updates, xorg). Before I used fglrx-updates because
One more very weird thing: when I use the keyboard to increase or
decrease screen brightness, the laptop goes to sleep. This didn't happen
before.
I checked systemsettings/shortcuts and gestures but this seems ok:
decrease sceen brightness - monitor brightness down
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You received this bug
Would it be possible for you to test the latest upstream kernel? Refer to
https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v3.17
kernel[0].
If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.
If the mainline kernel does not
** Tags added: kernel-bug-exists-upstream
** Changed in: linux (Ubuntu)
Status: Incomplete = Confirmed
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https://bugs.launchpad.net/bugs/1373969
Title:
Ubuntu 14.04 blank screen
** Attachment added: mainline kernel install log
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1373969/+attachment/4215368/+files/v3.17-rc6-utopic.txt
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