- This topic has 1 reply, 1 voice, and was last updated Jun 13-6:23 am by symbol.
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symbol
Hi there:
I am running Ubuntu on my macbook with Intel/Nvidia Optimus.
My xrandr can connect to HDMI port and it seems that my Nvidia card is working (with reasonable GPU usage), but my external monitor is still not working.
$ xrandr Screen 0: minimum 8 x 8, current 2880 x 1800, maximum 16384 x 16384 DP-0 disconnected primary (normal left inverted right x axis y axis) DP-1 disconnected (normal left inverted right x axis y axis) HDMI-0 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 597mm x 336mm 1920x1080 60.00*+ 59.94 50.00 60.05 60.00 50.04 1680x1050 59.95 1600x1200 60.00 1440x900 59.89 1366x768 59.79 1280x1024 75.02 60.02 1280x960 60.00 1280x720 60.00 59.94 50.00 1152x864 75.00 1024x768 75.03 70.07 60.00 800x600 75.00 72.19 60.32 56.25 720x576 50.00 720x480 59.94 640x480 75.00 72.81 59.94 59.93 DP-2 connected 2880x1800+0+0 (normal left inverted right x axis y axis) 331mm x 207mm 2880x1800 59.99*+ DP-3 disconnected (normal left inverted right x axis y axis) DP-4 disconnected (normal left inverted right x axis y axis)But my second monitor is still black screen, any way to debug through this?
**1. My xrandr can onty see one provider**
xrandr --listproviders Providers: number : 1 Provider 0: id: 0x279 cap: 0x1, Source Output crtcs: 4 outputs: 6 associated providers: 0 name:NVIDIA-0And also ** xrandr –setprovideroutputsource modesetting NVIDIA-0 ** does not actually work
$ xrandr --setprovideroutputsource modesetting NVIDIA-0 && xrandr --auto Could not find provider with name modesetting**2. grep modeset /lib/modprobe.d/ outputs**
**grep modeset /lib/modprobe.d/*** can find several files, all with modeset=0$ grep modeset /lib/modprobe.d/* /lib/modprobe.d/no-mode-set.conf:# disble modesetting in the following modules /lib/modprobe.d/no-mode-set.conf:options i915 modeset=0 /lib/modprobe.d/no-mode-set.conf:options nouveau modeset=0 /lib/modprobe.d/video-card-disable.conf:# disble modesetting for the following modules /lib/modprobe.d/video-card-disable.conf:options nouveau modeset=0 /lib/modprobe.d/video-card-disable.conf:options nvidiafb modeset=0**3. arandr can detect the second screen as expected**
- This topic was modified 11 months, 2 weeks ago by symbol. Reason: Add screenshots
- This topic was modified 11 months, 2 weeks ago by symbol. Reason: change tags
- This topic was modified 11 months, 2 weeks ago by symbol.
I managed to connect the external monitor with minidisplay port, the issue “No signal with HDMI is a known issue”
Apple hardware switch driven by the apple-gmux kernel driver which explains the model specific differences:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/platform/x86/apple-gmux.c#n311Since you’re running with everything switched to the nvidia gpu, prime can’t be used. The hdmi problem seems to be an known issue with your model:
https://forums.developer.nvidia.com/t/no-signal-with-hdmi-or-dp-0-ports-on-macbookpro10-1-gt-650m-only-dp-1-works/49777/5Some useful info about your model:
https://wiki.archlinux.org/title/MacBookPro10,xReference: https://forums.developer.nvidia.com/t/external-monitor-not-working-nvidia-optimus/216573/5
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