How to switch from NVIDIA to AMD GPU (both stay in the same system)

Support Graphics & Display
21

Are the free driver installed?

mhwd -li
22

@megavolt output of mhwd -li

> Installed PCI configs:
--------------------------------------------------------------------------------
                  NAME               VERSION          FREEDRIVER           TYPE
--------------------------------------------------------------------------------
           video-linux            2018.05.04                true            PCI


Warning: No installed USB configs!
23

but… should be:

blacklist nouveau

nouveau = Name of free driver (… sorry :smiley:)

24

Remove this

from the the kernel parameter. :slight_smile:

25

No change :frowning:

26

cough how would one remove nomodeset from the kernel parameters?

27

In /etc/default/grub remove it and then sudo update-grub.

28

should I change

GRUB_CMDLINE_LINUX_DEFAULT="quiet apparmor=1 security=apparmor udev.log_priority=3 nomodeset"

to

GRUB_CMDLINE_LINUX_DEFAULT="quiet apparmor=1 security=apparmor udev.log_priority=3"
1 Like
29

No change in behavior :frowning:

30

So these files does not exist correct? at least in xorg.conf.d/ there should be only 00-keyboard.conf

31

currently just that and the 20-radeon.conf suggested earlier

xorg.conf exists:

# nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig:  version 450.80.02

# nvidia-settings: X configuration file generated by nvidia-settings
# nvidia-settings:  version 440.100

Section "ServerLayout"
    Identifier     "Layout0"
    Screen      0  "Screen0" 0 0
    InputDevice    "Keyboard0" "CoreKeyboard"
    InputDevice    "Mouse0" "CorePointer"
    Option         "Xinerama" "0"
EndSection

Section "Files"
EndSection

Section "InputDevice"

    # generated from default
    Identifier     "Mouse0"
    Driver         "mouse"
    Option         "Protocol" "auto"
    Option         "Device" "/dev/psaux"
    Option         "Emulate3Buttons" "no"
    Option         "ZAxisMapping" "4 5"
EndSection

Section "InputDevice"

    # generated from default
    Identifier     "Keyboard0"
    Driver         "kbd"
EndSection

Section "Monitor"
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "ViewSonic XG2402 SERIES"
    HorizSync       160.0 - 160.0
    VertRefresh     48.0 - 146.0
    Option         "DPMS"
EndSection

Section "Device"
    Identifier     "Device1"
    Driver         "vesa"
    VendorName     "AMD"
    BoardName      "RX 580"
EndSection

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "Stereo" "0"
    Option         "nvidiaXineramaInfoOrder" "DFP-2"
    Option         "metamodes" "DP-0: 1920x1080_144 +1920+0, DVI-D-0: nvidia-auto-select +0+0, HDMI-0: 1920x1080 +3840+0"
    Option         "SLI" "Off"
    Option         "MultiGPU" "On"
    Option         "BaseMosaic" "off"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection
32

R-E-M-O-V-E :crazy_face:

I am not mad… the conversation is just very fast for a forum where you have to think… xD

33

LOL, I’m still a lamb… okay I removed both /etc/X11/xorg.conf and /etc/X11/xorg.conf.d/20-radeon.conf and NOW IT WORKS!!!

34

thanks @megavolt <3

35

p.s. for others like me (very naive) you can, from the command line / ssh do the following for easier debugging

sudo su // enter super user state
xinit // which logs to /etc/logs/Xorg.0.log
36

Btw… LOL … here is the problem… You used nvidia options with the amd gpu… no wonder it does not work xD On top you used vesa as driver… it is a generic driver for every gpu with very basic functionality… means only the terminal :stuck_out_tongue:

1 Like
37

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