Screen tearing since upgrade to Ubuntu 14.10

[dehuszar]

I have had the orientation and sensors working pretty well in Ubuntu 14.04, but upon the upgrade to 14.10, I've been experiencing screen tearing when flipping into tent mode directly from the default orientation.

If I rotate to the vertical orientation first and then go upside-down, then it seems to transition smoothly, but from default to upside-down orientation causes the viewport to show inverted duplications of the bottom half of the screen and duplicate cursors for each orientation.

I've tried both with just the compiled orientation program and also with the compiled ideapad-laptop module, just to make sure I wasn't seeing the issue because the orientation program was expecting something to be in place. The sensors program won't compile (and the docs advise against using it), but the default 3.16 sensors drivers seem to be otherwise working okay.

I've attached a screenshot so you can see what I mean.

Thanks in advance,
Sam

[pfps]

I don't see how this has anything to do with the orientation program itself
which uses xrandr to actually rotate the screen. You could try rotating the
screen manually with xrandr --orientation ... to see if you can recreate the
problem.

peter

On 11/09/2014 03:26 PM, dehuszar wrote:

I have had the orientation and sensors working pretty well in Ubuntu 14.04,
but upon the upgrade to 14.10, I've been experiencing screen tearing when
flipping into tent mode directly from the default orientation.

If I rotate to the vertical orientation first and then go upside-down, then it
seems to transition smoothly, but from default to upside-down orientation
causes the viewport to show inverted duplications of the bottom half of the
screen and duplicate cursors for each orientation.

I've tried both with just the compiled orientation program and also with the
compiled ideapad-laptop module, just to make sure I wasn't seeing the issue
because the orientation program was expecting something to be in place. The
sensors program won't compile (and the docs advise against using it), but the
default 3.16 sensors drivers seem to be otherwise working okay.

I've attached a screenshot so you can see what I mean.

screen tearing example
https://cloud.githubusercontent.com/assets/617658/4969671/7c374614-6867-11e4-90e9-22c2ff18a2ce.png

Thanks in advance,
Sam

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#28.

[rubo77]

I have the same phenomena when using my script that uses xrandr: https://gist.github.com/rubo77/daa262e0229f6e398766

[sjuxax]

Reported to Launchpad here. https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1395182

[dehuszar]

Good catch! I've added my name to the affected list
On Nov 21, 2014 4:02 PM, "Jeff Cook" notifications@github.com wrote:

Reported to Launchpad here.
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1395182

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#28 (comment).

[tobbyd]

It seems to be a problem with the intel graphics driver.
Compiling latest intel driver (xf86-video-intel - 2.99.917) fixed it for me (Yoga 3 Pro):
https://01.org/linuxgraphics/downloads

It also fixed the broken shadows of windows in Gnome 3.

[jymbob]

I can also confirm no tearing with latest intel drivers on Ubuntu 14.10

PPA with latest drivers: https://launchpad.net/~oibaf/+archive/ubuntu/graphics-drivers