Linux 4.x QXL 64-bit kernel modesetting breaks 32-bit X.Org
Originally created by @intrigeri on #11518 (Redmine)
With Linux 4.x we get KMS for QXL enabled by default. But then, when mixing a 64-bit kernel with 32-bit userspace, X.Org fails to start and says something like: “failed to set DRM interface version 1.4: Inappropriate ioctl for device”.
What works:
- booting with the 32-bit kernel (I’m starting to really want #8183 (closed))
qxl.modeset=0
I’ve tried a local xserver-xorg-video-qxl 0.1.4-3~bpo8+1 backport, but it did not help.
This affects feature/10298-linux-4.x-aufs (#10298 (closed)) and feature/stretch (KMS is required since X.Org runs as non-root; and maybe #11441 (closed) too).
Related issues
- Related to #11441 (closed)
- Related to #10298 (closed)
-
Blocked by #8183 (closed)
Edited by intrigeri