I have Dell Inspiron 5559 with freshly installed Fedora 24. Hardware goes with
Video Controller:
Integrated - Intel HD Graphics 520
Discrete - AMD Radeon R5 M335
output from
$ glxinfo|egrep "OpenGL vendor|OpenGL
OpenGL vendor string: Intel Open Source Technology Center
OpenGL renderer string: Mesa DRI Intel(R) HD Graphics 520 (Skylake GT2)
Means that integrated grahics in use. How can I switch to discrete?
Strangely lspci gives only 1 VGA compatible
00:00.0 Host bridge: Intel Corporation Skylake Host Bridge/DRAM Registers (rev 08)
00:02.0 VGA compatible controller: Intel Corporation HD Graphics 520 (rev 07)
...
01:00.0 Display controller: Advanced Micro Devices, Inc. [AMD/ATI] Sun XT [Radeon HD 8670A/8670M/8690M / R5 M330] (rev ff)
Update1: I found out that I can use switchheroo for changing between cards initial config looks like this
$ sudo cat /sys/kernel/debug/vgaswitcheroo/switch
0:IGD:+:Pwr:0000:00:02.0
1:DIS: :DynOff:0000:01:00.0
then I switch to VT3 and do
$ init 3
$ echo ON > /sys/kernel/debug/vgaswitcheroo/switch
$ echo DIS > /sys/kernel/debug/vgaswitcheroo/switch
$ echo OFF > /sys/kernel/debug/vgaswitcheroo/switch
$ init 5
the 3rd command blindly, because DIS gives blank screen and get
0:IGD: :Pwr:0000:00:02.0
1:DIS:+:DynOff:0000:01:00.0
but my screen is blinking and after reboot IGD up again. How can I store new settings and remove blinking?
