On 19/09/18 01:02, Keith Packard wrote:
Troll Berserker <berserker.tr...@yandex.com> writes:
Cool. In your talk you even mentions multiseating.
AFAIU with this technique one doesn't get multiple /dev/dri/card* for
a GPU out of the box, so it is not possible to use unmodified
modesetting driver to run multiple X servers.
Correct. I have posted X server patches to pass the DRM file descriptor
in from an external program, and a sample program which creates a lease
for that purpose.
Hmm. I see that drmDropMaster became conditional:
if (!ms->fd_passed)
drmDropMaster(ms->fd);
(https://github.com/mirror/xserver/commit/38ff29ec8ead0a293f50ac52146199babe4205ca#diff-4db01e9b0bfda6e79f6b85426b0cdb0aR1780)
I was thinking that may be it is possible to implement a CUSE driver to expose
leased descriptors as /dev/dri/card* devices so that it would be possible to
run X server unmodified.
But now I see that these leased FDs are somehow special so you can't perform
drmDropMaster on them.
Why?
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