On 2022-01-27 10:05:16 +0530, Pankaj Jangid wrote: > Since I have setup a new hardware - x570 chipset, rx570 GPU - I am > facing a very strange problem. The monitor goes blank for a brief time, > like 1-2s and then comes back. It is connected with the GPU using HDMI > cable.
I had a similar problem in 2009 with a monitor connected via HDMI to a Power Mac (not under Linux). This first happened from time to time, then much more often, i.e. every day. IIRC, there was no issue when later, this monitor was connected to a Debian laptop via VGA. I sold the monitor to someone else (and told him about this problem), and he confirmed the problem with his machine. So it could be a hardware problem, with this monitor or something else, possibly specific to HDMI. I suggest that you try with another machine, another cable, etc. if possible. Or the same machine with another monitor. > During that 1-2s, the machine response is fine. Whatever I type during > that time goes there as input, and visible when the monitor comes back. > > I don’t want to file any bug report till I have some concrete data. So > my question is - how do I diagnose such an issue and produce some data > for debugging. So that I can hand it over to maintainers. You might get messages in the /var/log/Xorg.0.log file if you're using X. BTW, with my setup, I regularly get disconnected/connected messages with 1-2 seconds delay, such as: [166285.233] (--) NVIDIA(GPU-0): DFP-4: disconnected [166285.233] (--) NVIDIA(GPU-0): DFP-4: Internal DisplayPort [166285.233] (--) NVIDIA(GPU-0): DFP-4: 960.0 MHz maximum pixel clock [166285.233] (--) NVIDIA(GPU-0): [166286.614] (--) NVIDIA(GPU-0): Samsung U32J59x (DFP-4): connected [166286.614] (--) NVIDIA(GPU-0): Samsung U32J59x (DFP-4): Internal DisplayPort [166286.614] (--) NVIDIA(GPU-0): Samsung U32J59x (DFP-4): 960.0 MHz maximum pixel clock [166286.614] (--) NVIDIA(GPU-0): I have 2 external monitors, this one connected via HDMI and another one connected via DisplayPort (no messages in Xorg.0.log for this other monitor). But I have never noticed any blank time with either monitor. That's strange. -- Vincent Lefèvre <vinc...@vinc17.net> - Web: <https://www.vinc17.net/> 100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/> Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)
