Hi,
I had no problem with the third monitor using a NVIDIA GT218 [GeForce 210].
I changed this old video card with another old video card. The “new” video card is a NVIDIA G72 [GeForce 7300 LE].
Now the third monitor show only the mouse pointer.
XFCE recognizes the monitor, and permits it to move windows on in, but it appears black (except for the arrow).
xrandr
Screen 0: minimum 320 x 200, current 5520 x 1080, maximum 8192 x 8192
DisplayPort-0 connected primary 1680x1050+1920+0 (normal left inverted right x axis y axis) 474mm x 296mm
1680x1050 60.45*+ 59.88
1600x1200 60.00
1280x1024 75.99 75.02 60.02
1440x900 59.89
1152x921 65.99
1152x900 66.00
1152x864 75.00
1024x768 75.03 70.07 60.00
832x624 74.55
800x600 72.19 75.00 60.32 56.25
640x480 75.00 72.81 66.67 59.94
720x400 70.08
DisplayPort-1 disconnected (normal left inverted right x axis y axis)
DVI-1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 531mm x 299mm
1920x1080 60.00*+
1600x1200 60.00
1680x1050 59.88
1280x1024 75.02 60.02
1440x900 59.90
1280x960 60.00
1152x864 75.00
1024x768 75.03 70.07 60.00
832x624 74.55
800x600 72.19 75.00 60.32 56.25
640x480 75.00 72.81 66.67 59.94
720x400 70.08
VGA-1-1 connected 1920x1080+3600+0 (normal left inverted right x axis y axis) 521mm x 293mm
1920x1080 60.00*+
1680x1050 59.95
1280x1024 75.02 60.02
1440x900 59.89
1280x960 60.00
1152x864 75.00
1280x720 60.00
1024x768 75.03 70.07 60.00
832x624 74.55
800x600 72.19 75.00 60.32 56.25
640x480 75.00 72.81 66.67 59.94
720x400 70.08
DVI-I-1-1 disconnected (normal left inverted right x axis y axis)
TV-1-1 disconnected (normal left inverted right x axis y axis)
1920x1080 (0x6f) 148.500MHz +HSync +VSync
h: width 1920 start 2008 end 2052 total 2200 skew 0 clock 67.50KHz
v: height 1080 start 1084 end 1089 total 1125 clock 60.00Hz
1280x1024 (0x5c) 135.000MHz +HSync +VSync
h: width 1280 start 1296 end 1440 total 1688 skew 0 clock 79.98KHz
v: height 1024 start 1025 end 1028 total 1066 clock 75.02Hz
1280x1024 (0x71) 108.000MHz +HSync +VSync
h: width 1280 start 1328 end 1440 total 1688 skew 0 clock 63.98KHz
v: height 1024 start 1025 end 1028 total 1066 clock 60.02Hz
1440x900 (0x5e) 106.500MHz -HSync +VSync
h: width 1440 start 1520 end 1672 total 1904 skew 0 clock 55.93KHz
v: height 900 start 903 end 909 total 934 clock 59.89Hz
1280x960 (0x73) 108.000MHz +HSync +VSync
h: width 1280 start 1376 end 1488 total 1800 skew 0 clock 60.00KHz
v: height 960 start 961 end 964 total 1000 clock 60.00Hz
1152x864 (0x61) 108.000MHz +HSync +VSync
h: width 1152 start 1216 end 1344 total 1600 skew 0 clock 67.50KHz
v: height 864 start 865 end 868 total 900 clock 75.00Hz
1024x768 (0x62) 78.750MHz +HSync +VSync
h: width 1024 start 1040 end 1136 total 1312 skew 0 clock 60.02KHz
v: height 768 start 769 end 772 total 800 clock 75.03Hz
1024x768 (0x63) 75.000MHz -HSync -VSync
h: width 1024 start 1048 end 1184 total 1328 skew 0 clock 56.48KHz
v: height 768 start 771 end 777 total 806 clock 70.07Hz
1024x768 (0x64) 65.000MHz -HSync -VSync
h: width 1024 start 1048 end 1184 total 1344 skew 0 clock 48.36KHz
v: height 768 start 771 end 777 total 806 clock 60.00Hz
832x624 (0x65) 57.284MHz -HSync -VSync
h: width 832 start 864 end 928 total 1152 skew 0 clock 49.73KHz
v: height 624 start 625 end 628 total 667 clock 74.55Hz
800x600 (0x66) 50.000MHz +HSync +VSync
h: width 800 start 856 end 976 total 1040 skew 0 clock 48.08KHz
v: height 600 start 637 end 643 total 666 clock 72.19Hz
800x600 (0x67) 49.500MHz +HSync +VSync
h: width 800 start 816 end 896 total 1056 skew 0 clock 46.88KHz
v: height 600 start 601 end 604 total 625 clock 75.00Hz
800x600 (0x68) 40.000MHz +HSync +VSync
h: width 800 start 840 end 968 total 1056 skew 0 clock 37.88KHz
v: height 600 start 601 end 605 total 628 clock 60.32Hz
800x600 (0x69) 36.000MHz +HSync +VSync
h: width 800 start 824 end 896 total 1024 skew 0 clock 35.16KHz
v: height 600 start 601 end 603 total 625 clock 56.25Hz
640x480 (0x6a) 31.500MHz -HSync -VSync
h: width 640 start 656 end 720 total 840 skew 0 clock 37.50KHz
v: height 480 start 481 end 484 total 500 clock 75.00Hz
640x480 (0x6b) 31.500MHz -HSync -VSync
h: width 640 start 664 end 704 total 832 skew 0 clock 37.86KHz
v: height 480 start 489 end 492 total 520 clock 72.81Hz
640x480 (0x6c) 30.240MHz -HSync -VSync
h: width 640 start 704 end 768 total 864 skew 0 clock 35.00KHz
v: height 480 start 483 end 486 total 525 clock 66.67Hz
640x480 (0x6d) 25.175MHz -HSync -VSync
h: width 640 start 656 end 752 total 800 skew 0 clock 31.47KHz
v: height 480 start 490 end 492 total 525 clock 59.94Hz
720x400 (0x6e) 28.320MHz -HSync +VSync
h: width 720 start 738 end 846 total 900 skew 0 clock 31.47KHz
v: height 400 start 412 end 414 total 449 clock 70.08Hz
xini graphic section:
Graphics:
Device-1: NVIDIA G72 [GeForce 7300 LE] vendor: ASUSTeK driver: nouveau
v: kernel arch: Curie bus-ID: 03:00.0
Device-2: AMD Juniper XT [Radeon HD 5770] vendor: Apple MacPro5 1
driver: radeon v: kernel arch: TeraScale-2 bus-ID: 05:00.0 temp: 46.0 C
Device-3: Alcor Micro USB 2.0 PC Camera type: USB driver: uvcvideo
bus-ID: 1-2.3.4:14
Device-4: ARC Camera type: USB driver: snd-usb-audio,uvcvideo
bus-ID: 1-2.4:11
Display: x11 server: X.Org v: 21.1.6 with: Xwayland v: 22.1.7 driver: X:
loaded: nouveau,radeon unloaded: modesetting dri: r600,nouveau
gpu: nouveau,radeon resolution: 1: 1920x1080~60Hz 2: 1680x1050~60Hz
3: 1920x1080~60Hz
API: OpenGL v: 4.5 Mesa 22.3.4 renderer: AMD JUNIPER (DRM 2.50.0 /
5.15.91-1-MANJARO LLVM 15.0.7) direct render: Yes
System:
Host: skejja Kernel: 5.15.91-1-MANJARO arch: x86_64 bits: 64 compiler: gcc
v: 12.2.1 Desktop: Xfce v: 4.18.1 Distro: Manjaro Linux base: Arch Linux
can you help me, please?