The default driver on intel hw is modesetting_drv.so now, which enables
DRI3. If you need/want to change back to intel on your system, then it's
just as easy to flip DRI3 on...
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Should we reconsider this? Three reasons for that:
- Since Vivid (hwen reported bugs occur) the driver code evolved a lot;
- Probably would be good for the migration to a GNOME desktop environment;
- Vulkan driver is becoming more present each day and it needs the DRI3.
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It seems to have being explicitly disabled in the driver after this bug report:
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/1401784
It includes instructions on how to try back DRI3 and an example of test case to
try with the latest code
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Those bugs should be reported to mesa, kernel and unity7 (if they are
already not) and maybe, added here, so we can keep track of the progress
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At least as of the code shipped in Wily, DRI3 on Intel still has fairly
obvious bugs.
The least concerning one is that Unity7 will sometimes fail to notice
the invalidation of buffers on monitor hotplug, and so will alternate
between a correct buffer and a mostly-undefined buffer (probably a Mesa
Vulkan needs DRI3 support. It'd be good to have this enabled despite the
caveats.
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https://bugs.launchpad.net/bugs/1441951
Title:
Enable DRI3
Status
I've heard that DRI3 caused bugs but I haven't found any evidence of
what sorts of bugs or when it was enabled. Please note down if you know
reasons it shouldn't be enabled.
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