Public bug reported:
I'm running Ubuntu 13.04 on a Dell XPS 14 with integrated Intel HD 4000.
The problem is that the coloring si really bad (in gradients, for
example, bands of colors can be distinguished). It's like the color
depth is not really 24bit.
This issue is known, and Intel never fixed it in Windows drivers
(https://communities.intel.com/thread/29420?start=0tstart=0).
I searched and the problem is probably due to HDMI different color range
(16-235); when it's scaled in laptop's display standard 0-255 some
colors are lost.
I experienced the same issue in Ubuntu 13.10.
The package version is 2:2.21.9-0ubuntu0~raring
** Affects: xserver-xorg-video-intel (Ubuntu)
Importance: Undecided
Status: New
** Tags: bands coloring dithering hd4000
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https://bugs.launchpad.net/bugs/1268938
Title:
Banding/dithering problem on Intel HD 4000
Status in “xserver-xorg-video-intel” package in Ubuntu:
New
Bug description:
I'm running Ubuntu 13.04 on a Dell XPS 14 with integrated Intel HD
4000. The problem is that the coloring si really bad (in gradients,
for example, bands of colors can be distinguished). It's like the
color depth is not really 24bit.
This issue is known, and Intel never fixed it in Windows drivers
(https://communities.intel.com/thread/29420?start=0tstart=0).
I searched and the problem is probably due to HDMI different color
range (16-235); when it's scaled in laptop's display standard
0-255 some colors are lost.
I experienced the same issue in Ubuntu 13.10.
The package version is 2:2.21.9-0ubuntu0~raring
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1268938/+subscriptions
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