https://bugzilla.kernel.org/show_bug.cgi?id=60623
Bug ID: 60623 Summary: White Screen on boot with radeon.dpm=1 Product: Drivers Version: 2.5 Kernel Version: 3.11.0-999-generic Hardware: x86-64 OS: Linux Tree: Mainline Status: NEW Severity: blocking Priority: P1 Component: Video(DRI - non Intel) Assignee: drivers_video-dri@kernel-bugs.osdl.org Reporter: electrobs@gmail.com Regression: No
Using the latest ubuntu built kernel from http://kernel.ubuntu.com/~kernel-ppa/mainline/, and enabling the boot option of radeon.dpm=1 . Results in a black screen after grub that eventually turns white gradually. Removing the option allows the laptop to function perfectly with the AMD 3650 video card.
Hardware: -Lenovo T500 with AMD 3650 and a Intel 4500MHD switchable graphics off. -more info at http://support.lenovo.com/en_US/detail.page?LegacyDocID=MIGR-71785
Software: -clean install of Kubuntu 13.04 with beta ppa enabled for KDE 4.11 rc2 -xorg-edgers ppa enabled