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Monitor connected via DVI-D to HDMI cable doesn't work with 565.57.01-1, works fine in 560.35.03-15

Description:

I have a setup with 2 monitors connected to GeForce GTX 750 Ti. I use 2 DVI-D ports on the card to connect 2 DELL 24" monitors, one is using DVI-D to HDMI cable (it doesn't have DVI input), the second one is using a DVI to DVI cable.

This setup has worked perfectly for years, in GNOME, KDE, X11, Wayland, whatever you want.

After last upgrade to:

  • nvidia-utils 565.57.01-1
  • nvidia 565.57.01-1
  • nvidia-settings 565.57.01-1
  • linux 6.11.5.arch1-1

this setup no longer works. The first monitor (the one using DVI-HDMI cable) is correctly detected in GNOME settings (it still lists 2 monitors, with proper name, size, resolution, refresh rate and so on), however the monitor is black and says "cable disconnected" (it does that whenever there's no input, for example when going into "screen blank" power saving mode in GNOME after 5 minutes of inactivity). Switching cables between DVI ports on the video card doesn't change anything (the problem persists on the monitor using DVI-HDMI cable). Changing between X11 and Wayland doesn't change anything. The cable and monitor is fine, because when it is a primary monitor (connected to first port of video card), it correctly displays motherboard splashscreen, first info from Linux bootloader, and at the moment when it should display GDM it goes "blank".

If I downgrade those 4 packages to:

  • [2024-11-01T21:37:48+0100] [ALPM] downgraded linux (6.11.5.arch1-1 -> 6.11.4.arch1-1)
  • [2024-11-01T21:37:49+0100] [ALPM] downgraded nvidia-utils (565.57.01-1 -> 560.35.03-16)
  • [2024-11-01T21:37:50+0100] [ALPM] downgraded nvidia (565.57.01-1 -> 560.35.03-15)
  • [2024-11-01T21:37:50+0100] [ALPM] downgraded nvidia-settings (565.57.01-1 -> 560.35.03-1)

the problem goes away and both monitors are working as expected.

At this stage I'm not sure whether it's a problem in linux or in nvidia drivers. I also have no idea whether it's a problem known upstream or not. If I downgrade just the 3 nvidia packages without downgrading linux package, then the video card is most likely not working correctly, because it allows to use just 1 monitor with 1024x768 resolution.

Note that if I connect just this 1 problematic monitor/cable, then it also doesn't work and the monitor is blank, however then I have no second monitor to confirm that GNOME/PC/... actually works at all (;

Let me know what more details I can provide and I'll try my best to do that.

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