Simone Scalabrino, thank you for reporting this bug to Ubuntu. Saucy reached
EOL on July 17, 2014.
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If this is reproducible in a supported release, please file a new
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** Changed in: xserver-xorg-video-intel (Ubuntu)
Status: New => Invalid
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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:
Invalid
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=0&tstart=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
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