[Bug 195165] New: Kernel with drm panics, when xorg tries to load new drm-modules

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Wed Nov 19 13:49:54 UTC 2014


            Bug ID: 195165
           Summary: Kernel with drm panics, when xorg tries to load new
           Product: Base System
           Version: 10.1-RELEASE
          Hardware: amd64
                OS: Any
            Status: Needs Triage
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: mi at ALDAN.algebra.com

Created attachment 149586
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=149586&action=edit
core.txt file from the panic

I had a fairly solid system running 9.x and decided to upgrade to 10.1.

The rebuild went smoothly, the same kernel-config was built cleanly. I rebuilt
all of the X11-ports and tried starting xdm as usual.

The machine rebooted after a panic (see attachment for more details):

panic: make_dev_credv: bad si_name (error=17, si_name=dri/card0)

Apparently, this is problem has been known to the x11@ folks for a while --
when the new X11-drivers try to load DRM2, the kernels with the "old" DRM in
them will panic:


While the recommended work-around -- remove "device drm" and "device radeondrm"
from kernel config -- helped me get going, it should not be necessary:

 1. There must be no panic
 2. If DRM2 can not coexist with DRM, it must check for the condition and
    an error.
 3. If DRM2 is a replacement for DRM, why not remove the old "device"

No doubt, the x11@ group is aware of the problem. This ticket is intended to
help them track it.

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