Second monitor not working in desktop opensuse tumbleweed

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#1

Hello all,
A couple of days ago I installed the brand new opensuse tumbleweed kde for SSD 240 GB, dual boot windows 10 pro in my work computer, choosing KDE as desktop. I want to switch to linux by removing windows, great os opensuse tumbleweed kde. The machine is equipped with an Radeon rx580 8GB video card which feeds two 1920x1080 ASUS monitors 27 inch, one connected through HDMI and the other AOC monitor 1920x1080 27 inch too through HDMI;
Everything works fine except that I wasn’t able to make the work second monitor (both monitors work on windows).
I installed fedora, manjaro, opensuse tumbleweed kde, second monitor not working nowhere
Does not see the second monitor in the system settings.
I think this is a KDE problem
If anyone has had similar problems, and if anyone could provide a possible solution, that would be wonderful. Thank you!

#2

What about:

erlangen:~ # inxi -zaG
Graphics:
  Device-1: AMD Cezanne [Radeon Vega Series / Radeon Mobile Series]
    driver: amdgpu v: kernel arch: GCN-5.1 code: Vega-2 process: TSMC n7 (7nm)
    built: 2018-21 pcie: gen: 3 speed: 8 GT/s lanes: 16 link-max: gen: 4
    speed: 16 GT/s ports: active: HDMI-A-1 empty: DP-1,DP-2 bus-ID: 30:00.0
    chip-ID: 1002:1638 class-ID: 0300 temp: 32.0 C
  Display: x11 server: X.Org v: 21.1.7 with: Xwayland v: 23.1.0
    compositor: kwin_x11 driver: X: loaded: modesetting unloaded: fbdev,vesa
    dri: radeonsi gpu: amdgpu display-ID: :0 screens: 1
  Screen-1: 0 s-res: 3840x2160 s-dpi: 192 s-size: 508x285mm (20.00x11.22")
    s-diag: 582mm (22.93")
  Monitor-1: HDMI-A-1 mapped: HDMI-1 model: Samsung LU28R55 serial: <filter>
    built: 2038 res: 3840x2160 hz: 60 dpi: 154 gamma: 1.2
    size: 632x360mm (24.88x14.17") diag: 727mm (28.6") ratio: 16:9 modes:
    max: 3840x2160 min: 720x400
  API: OpenGL v: 4.6 Mesa 23.0.0 renderer: AMD Radeon Graphics (renoir LLVM
    15.0.7 DRM 3.49 6.2.8-1-default) direct render: Yes
erlangen:~ #
#3

temurim@localhost:~> inxi -zaG
Graphics:
Device-1: AMD Ellesmere [Radeon RX 470/480/570/570X/580/580X/590]
vendor: Micro-Star MSI driver: amdgpu v: kernel arch: GCN-4
code: Arctic Islands process: GF 14nm built: 2016-20 pcie: gen: 3
speed: 8 GT/s lanes: 16 ports: active: HDMI-A-1 empty: DP-1, DP-2,
DVI-D-1, HDMI-A-2 bus-ID: 01:00.0 chip-ID: 1002:67df class-ID: 0300
temp: 48.0 C
Device-2: Logitech Webcam C270 type: USB driver: snd-usb-audio,uvcvideo
bus-ID: 3-4:3 chip-ID: 046d:0825 class-ID: 0102 serial:
Display: x11 server: X.Org v: 21.1.7 with: Xwayland v: 23.1.0
compositor: kwin_x11 driver: X: loaded: modesetting unloaded: fbdev,vesa
dri: radeonsi gpu: amdgpu display-ID: :0 screens: 1
Screen-1: 0 s-res: 1920x1080 s-dpi: 96 s-size: 508x285mm (20.00x11.22")
s-diag: 582mm (22.93")
Monitor-1: HDMI-A-1 mapped: HDMI-1 model: Asus VX279 serial:
built: 2015 res: 1920x1080 hz: 60 dpi: 82 gamma: 1.2
size: 598x336mm (23.54x13.23") diag: 686mm (27") ratio: 16:9 modes:
max: 1920x1080 min: 720x400
API: OpenGL v: 4.6 Mesa 23.0.1 renderer: AMD Radeon RX 580 Series
(polaris10 LLVM 15.0.7 DRM 3.49 6.2.8-1-default) direct render: Yes
temurim@localhost:~>

#4

the second monitor does not see

#5

maybe to me need to add 50-monitor.conf here, I don’t know how to do it

#6

Could be a broken Device. Dual monitor works without further tinkering here:

erlangen:~ # ssh 6700k inxi -zaG
Graphics:
  Device-1: AMD Lexa PRO [Radeon 540/540X/550/550X / RX 540X/550/550X] vendor: Sapphire
    driver: amdgpu v: kernel arch: GCN-4 code: Arctic Islands process: GF 14nm built: 2016-20 pcie:
    gen: 1 speed: 2.5 GT/s lanes: 8 link-max: gen: 3 speed: 8 GT/s ports: active: DVI-D-1,HDMI-A-1
    empty: DP-1 bus-ID: 01:00.0 chip-ID: 1002:699f class-ID: 0300 temp: 46.0 C
  Display: x11 server: X.org v: 1.21.1.7 with: Xwayland v: 23.1.0 compositor: kwin_x11 driver: X:
    loaded: modesetting unloaded: fbdev,vesa dri: radeonsi gpu: amdgpu tty: 80x40
  Monitor-1: DVI-D-1 model: LG (GoldStar) 24EB23 serial: <filter> built: 2013 res: 1920x1200
    dpi: 94 gamma: 1.2 size: 520x330mm (20.47x12.99") diag: 616mm (24.2") ratio: 16:10 modes:
    max: 1920x1200 min: 720x400
  Monitor-2: HDMI-A-1 model: Panasonic Panasonic-TV serial: <filter> built: 2014 res: 1920x1080
    dpi: 38 gamma: 1.2 size: 698x392mm (27.48x15.43") diag: 1469mm (57.8") ratio: 16:9 modes:
    max: 1920x1080 min: 640x480
  API: OpenGL Message: GL data unavailable in console for root.
erlangen:~ #

You may try and search for “AMD Ellesmere [Radeon RX 470/480/570/570X/580/580X/590] dual monitor”.

#8

try DP ports instead of HDMI

#9

both monitors work on windows 10 pro

#10

I have two monitors and both HDMI, both monitors work on windows 10 pro

#11

I see. According to post #3 the Asus VX279 is detected.

Is the AOC monitor detected when removing the Asus VX279?

1 Like
#12

I turned off the Asus VX279 monitor, rebooted, did not see the AOC d2769vh monitor, then connected the Asus VX279 monitor again, did not identify the Asus, rebooted forcibly and saw both monitors (see link), then usually configured through the system parameters, and everything is fine. Thanks a lot for the hint.
have a nice day
https://paste.opensuse.org/pastes/89869d05fe50
https://paste.opensuse.org/pastes/bdcc55d6f3c1

Fixing opensuse tumbleweed KDE Dual Monitor
#13

Thanks for comprehensive feedback.

1 Like
#14

now i can switch from windows to linux