https://bugzilla.kernel.org/show_bug.cgi?id=73901 Bug ID: 73901 Summary: Kernel crash after modprobe radeon runpm=1 Product: Drivers Version: 2.5 Kernel Version: 3.14 Hardware: x86-64 OS: Linux Tree: Mainline Status: NEW Severity: high Priority: P1 Component: Video(DRI - non Intel) Assignee: drivers_video-dri@xxxxxxxxxxxxxxxxxxxx Reporter: pali.rohar@xxxxxxxxx Regression: No After modprobing radeon driver with runpm=1 notebook display panel output is immediatelly black (probably turned off) and after one or two seconds kernel freeze/crash (sysrq not working too). I was able to dump & sync syslog kernel output before freeze (called sync command in infinite loop on background). See attachment where is log from syslog daemon after modprobing radeon kernel module (with runpm=1). I'm not able to provide any other debug output as display is off and kernel crashing... Problem is reproducable always on notebook Dell Latitude E6440 which have muxless AMD Radeon HD 8690M graphic card. Black screen is probably caused by intel driver at line: [ 171.913779] i915: switched off And kernel crash by NULL derefence: [ 173.442690] BUG: unable to handle kernel NULL pointer dereference at 0000000000000008 My AMD graphics card is identified by lspci -nn as: 01:00.0 Display controller [0380]: Advanced Micro Devices, Inc. [AMD/ATI] Sun XT [Radeon HD 8670A/8670M/8690M] [1002:6660] -- You are receiving this mail because: You are watching the assignee of the bug. _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
