https://bugzilla.kernel.org/show_bug.cgi?id=83531

Bug ID: 83531 Summary: radeon 6650m cannot boot without radeon.runpm=0 Product: Drivers Version: 2.5 Kernel Version: 3.13-3.15.10 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Video(DRI - non Intel) Assignee: drivers_video-dri@kernel-bugs.osdl.org Reporter: kvbevsauce@gmail.com Regression: No

my laptop is a lenovo z575 with an amd a6-3420 apu and a 6650m for hybrid graphics. I am running fedora 20 with the latest kernel of 3.15.10

ever since I updated to kernel 3.13 sometime ago when hybrid DPM was enabled my laptop will not boot without the above kernel parameter.

i have the plymouth boot screen disabled so it shows text based boot. the moment the boot text "fedora 20 hisenbug" shows up, between 3 and 5 seconds later the cursor will stop blinking and the system will be frozen. sometimes more boot text shows up after sometimes not.

any help to get dynamic power management working.