2016-01-04 17:37 GMT+01:00 Sven Arvidsson <[email protected]>: > On Mon, 2016-01-04 at 16:25 +0100, Giuseppe Longo wrote: >> Also, from dmesg: >> [ 34.975654] [drm:r600_ring_test] *ERROR* radeon: ring 0 test >> failed >> (scratch(0x850C)=0xCAFEDEAD) >> [ 34.975683] [drm:si_resume] *ERROR* si startup failed on resume >> [ 34.976382] [drm:si_dpm_set_power_state] *ERROR* >> si_upload_sw_state failed > > If the HDMI port is handled by the radeon card, it won't work until the > driver and firmware works, and only if it is supported by the driver in > jessie. > > The message above might be something related to having two GPUs: > http://askubuntu.com/questions/457391/radeon-ring-0-test-failed-on-boot-ubuntu-14-04 > > Does the laptop have something like that?
I'm almost sure that my laptop have an hybrid card, I've already found this solution on google but I don't have /sys/kernel/debug/vgaswitcheroo/switch also I didn't find something like "Enable GPU switching" in bios settings
