https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=220384
Bug ID: 220384
Summary: Loading kernel module i915 after i915kms panics
Product: Base System
Version: 11.0-RELEASE
Hardware: i386
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: kern
Assignee: freebsd-bugs@FreeBSD.org
Reporter: mar...@sugioarto.com
Hi,
this happens on 11.0-RELEASE and 11.1-BETA2. Even more annoying is that Xorg
xf86-video-intel driver loads both kernel modules and causes the same panic
(since March this year). I reduced it to a simple sequence of kldload commands.
Steps to reproduce (on many systems one of the modules is already loaded in
/boot/loader.conf):
1) kldload i915kms
2) kldload i915
Both modules want to install the device /dev/dri/card0 which causes a clash
(errno EEXIST) and a subsequent panic.
Stack trace:
make_dev_sv
make_dev
drm_attach
i915_attach
device_attach
...
Panic message:
panic: make_dev_sv: bad si_name (error=17, si_name=dri/card0)
Expected behavior:
Only one of the kernel modules should load. The other subsequent kldload should
fail to load without causing a panic.
--
Martin
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