DRM hotplug does not obey -isolateDevice
Submitted by Alexander Monakov
Assigned to Xorg Project Team
Description
Looks like since
[PATCH] xfree86: use udev to provide device enumeration for kms devices http://lists.x.org/archives/xorg-devel/2012-June/031669.html
the server will attempt to initialize GPU devices other than specified by the -isolateDevice option.
At the moment, in combination with Ubuntu patches it leads to this failure:
https://launchpadlibrarian.net/135935376/Xorg.8.log
even though in addition to -isolateDevice, "AutoAddGPU" "False" is specified in the config, and then Section "Device" follows, specifying the driver (nvidia), but not the BusID. Adding BusID eliminates the issue.