Shaky screen on Lenovo Y70 Touch
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Invalid
|
Low
|
Unassigned |
Bug Description
I have a relatively new Lenovo Y70 Touch (came preinstalled with Win8). I installed Ubuntu 14.04 on it.
By "Shaky" (in the headline) I mean that the image shakes from side to side (it seems) about 3 points. Some points end up at the end of the previous line. Very annoying to look at. Before changing anything, the screen driver seems to be an intel driver. (There is a combined NVidia and Intel screen card.) It is also possible to change the screen backlight by using the buttons.
Searching on the web I found that I could add "nomodeset" to the kernel command line. Doing this stabilizes the screen, but the control of the screen backlight disappears.
If I in addition add "acpi_osi=Linux" and "acpi_backlight
Along the way to the current workaround, I have had bumblebee and some other software installed and automatically removed as it was not needed.
I believe this applies to other distributions as well.
Numbered questions and answers (found under "We also need:" in th
1) Output from "lsb_release -rd":
Description: Ubuntu 14.04.3 LTS
Release: 14.04
2) Outut from "apt-cache policy linux*":
see attached file "policy"
3) What I expect to happen:
a. That the screen would be stabile from the start of the installation
b. That the backlight control would be available from the start of the installation and not disappear.
4) What happened instead:
a. The screen was "shaking" from the start. (Not a stabile image at all.)
b. After adding a fix (see above) the screen became stabile but the screen backlight control disappeared. No remedy has been found for this.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-
ProcVersionSign
Uname: Linux 3.16.0-50-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.15
Architecture: amd64
CurrentDesktop: Unity
Date: Mon Oct 19 16:34:08 2015
InstallationDate: Installed on 2015-06-11 (130 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
SourcePackage: linux-lts-utopic
UpgradeStatus: No upgrade log present (probably fresh install)
Per Olav Kroka, thank you for taking the time to report this bug and helping to make Ubuntu better. Please execute the following command only once, as it will automatically gather debugging information, in a terminal:
apport-collect 1507689