upstream has a fix commited:
" drm/i915: enable dip before writing data on gen4
While testing with the intel_infoframes tool on gen4, I see that when
video DIP is disabled, what we write to the DATA memory is not exactly
what we read back later."
** Changed in: linux (Ubuntu)
Status: Incomplete => New
** Changed in: pulseaudio (Ubuntu)
Status: Incomplete => New
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https://bugs.launchpad.net/bugs/973704
Title:
[Thinkpad X201] audio no longer work from the HDMI/Display port
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