I have built some test kernels with that patch applied, can you test
these kernels and confirm they resolve the issue. Kernels are at the
URL below:
http://people.canonical.com/~apw/lp1295032-trusty/
Please report any testing here.
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https://bugs.launchpad.net/bugs/1295032
Title:
3840x2160 fails with 30Hz with HDMI
Status in “linux” package in Ubuntu:
Triaged
Bug description:
The radeon graphics card driver assumes any pixel clock speed over
165000 should be using Dual-Link DVI, although the speeds are possible
over HDMI as of HDMI 1.3.
The fix, as well as a link to a more detailed bug report, can be found here:
https://github.com/torvalds/linux/commit/d03874c881a049a50e12f285077ab1f9fc2686e1
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1295032/+subscriptions
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