[SOLVED] Slackware multi display configuration

jpallaria · 11-23-2018, 09:47 PM

Hey, I've been following the beginners guide for Slackware, and I'm working on the display configuration part, but I've run into some trouble and I need your help. For my hardware, I'm using an amd APU with no graphics card attached. I'm also doing an EFI setup with ELILO and the huge kernel (if that matters). I have not fully upgraded my slackpkg stuff yet, and I've chosen XFCE for my desktop environment.

The guide suggests:

Code:

X -configure

which works fine for my single monitor when I "startx", however, a second monitor remains undetected, according to my xrandr command. I studied the xorg.conf man pages as well as the Multihead article on the arch wiki in order to write my own config file. Right now I have 2 files in my /etc/X11/xorg.conf.d/

10-monitor.conf:

Code:

Section "Monitor"
    Identifier "DVI0"
    Option "primary" "true"
EndSection
 
Section "Monitor"
    Identifier "HDMI0"
    Option "LeftOf" "DVI1"
EndSection
 
Section "Screen"
    Identifier "Screen0"
    Device "AMDgpu"
    Monitor "DVI0"
    Monitor "HDMI0"
    DefaultDepth 24
    SubSection "Display"
        Depth 24
    EndSubSection
EndSection

20-amd.conf:

Code:

Section "Device"
        Identifier "AMDgpu"
        Driver "amdgpu"
        Option "Monitor-DVI-0" "DVI0"
        Option "Monitor-HDMI-0" "HDMI0"
EndSection

There are some other files in /usr/share/X11/xorg.conf.d/ , but they are mostly unrelated to this issue (keyboard layout, evdev, vmmouse, etc). The server fails on the device section, and I'm not sure how to continue. Changing the driver to "vesa" will start the server again, but it's the same result as the X -configure option. If you have any advice on how to move forward, it is greatly appreciated, thank you.

Xorg.0.log: https://pastebin.com/6ca8XfPJ

mrmazda · 11-25-2018, 01:42 AM

Which AMD GPU do you have?

2-3 problems I see, depending on how one counts:

1-The log reports no devices detected. To me that suggests something very significant is missing, but whether kernel related, X-related, configuration-related and/or driver related I don't can't tell from so short a log. Maybe dmesg or journal shows more clues.

2-X -configure, when it doesn't segfault, since over a decade ago is nearly always a waste of time. It produces a cluttered file that's functionally identical to what automagic provides.

3-I've always need two screen sections for dual display configuration when automagic was inadequate. You have only one. Try using http://fm.no-ip.com/Share/Linux/xorg...x1080right-120 as a template to create your own.

RadicalDreamer · 11-25-2018, 02:37 AM

jpallaria, you should ask a moderator to move this thread to the Slackware forum.

jpallaria · 11-25-2018, 04:01 PM

Hey, I copied this thread over to the Slackware section. here is the link and my response:

https://www.linuxquestions.org/quest...ig-4175643001/

I will mark this thread as closed/solved and keep the other one open.