Created attachment 77173 [details] crash log When I try to enable discrete GPU I get kernel module crash (please look into attached log) and system lockup (few seconds later). Software: Kubuntu 13.04 x86_64 updated from Canonical X Staging PPA (there is just stable X.Org Server 1.14, stable Mesa 9.1 and stable 7.1.0 radeon driver) Linux 3.9rc4 Mesa: 9.1 libdrm-radeon1: 2.4.43 xserver-xorg-video-radeon: 7.1.0 xserver-xorg-core: 1.14.0 Hardware: Acer Aspire 7560G laptop, AMD APU A8-3500M with integrated Radeon HD 6620G (SUMO) Discrete AMD Radeon HD 6650M (TURKS) "xrandr --listproviders" output: Providers: number : 2 Provider 0: id: 138 cap: 0xf, Source Output, Sink Output, Source Offload, Sink Offload crtcs: 2 outputs: 3 associated providers: 1 name:radeon Provider 1: id: 85 cap: 0xf, Source Output, Sink Output, Source Offload, Sink Offload crtcs: 6 outputs: 0 associated providers: 1 name:radeon
Your dGPU is not powering up for some reason.
Tested with proprietary driver - issues reproducible (GPU not power-up without reboot) so probably problems with hardware or maybe BIOS.
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