[Bug 80901] New: [radeon] loading corrupts lspci entry + unloading crashes kernel
bugzilla-daemon at bugzilla.kernel.org
bugzilla-daemon at bugzilla.kernel.org
Tue Jul 22 07:00:38 PDT 2014
https://bugzilla.kernel.org/show_bug.cgi?id=80901
Bug ID: 80901
Summary: [radeon] loading corrupts lspci entry + unloading
crashes kernel
Product: Drivers
Version: 2.5
Kernel Version: 3.16.0
Hardware: IA-64
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Video(DRI - non Intel)
Assignee: drivers_video-dri at kernel-bugs.osdl.org
Reporter: amerryfellow at gmail.com
Regression: No
Created attachment 143901
--> https://bugzilla.kernel.org/attachment.cgi?id=143901&action=edit
lspci w/ radeon
Hi all. I've been searching the internet for quite a while now, but couldn't
find any solution to my problem. I currently am on a laptop Dell Inspiron 15R
SE, with a i7 3632QM cpu ( which embeds a i915 intel card ) and a discrete
AMD/ATI Radeon HD 773M.
I know this kind of hybrid graphics setup's support is getting better more
recently, but I still am facing some problems with the open source driver.
The main problem is that, I don't really know if ( with PRIME ) my card is
working at all. This is because when I tried the tool radeontop, it couldn't
find my card. This is due, I suspect, to the fact that whenever I load my
"radeon" module, I think it messes up the device. This seems confirmed by the
fact that I get a clean lspci -vvv when the module is unloaded, and a "unknown
header type 7f" when the module is loaded. See attachments please.
Also, it takes a few seconds to load the module itself, and when I unload it (
modprobe -r radeon ) it crashes my machine, right after a few seconds. The
system log shows a dereference problem, but "live" I can only see the stack
trace the kernel outputs and nothing more.
Steps to Reproduce:
modprobe radeon
modprobe -r radeon
Actual Results:
Radeon's LSPCI entry is messed up and card is not recognized by tools. On
unloading, crashes.
Expected Results:
Radeon's LSPCI entry is ok, radeon card is recognized and on unloading,
nothing.
Build Date & Hardware:
Laptop Dell Inspiron 15R SE
Intel i7 3632QM
AMD Radeon HD 7730M Cape Verde
Software:
Arch Linux
Custom Kernel 3.16.0-rc6
Xorg-server 1.16.0-2
xf86-video-intel 2.99.912-4
xf86-video-ati 1:7.4.0-3
Additional Builds and Platforms:
Problem encountered also with stock kernel config and with kernel version 3.13.
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