[Kernel-packages] [Bug 1929209] Re: external monitor goes black for several seconds at a time, randomly

** Changed in: linux (Ubuntu) Status: Incomplete => New ** Summary changed: - external monitor goes black for several seconds at a time, randomly + [i915] external monitor goes black for several seconds at a time, randomly ** Tags added: i915 multimonitor -- You received this bug

[Kernel-packages] [Bug 1929209] Re: external monitor goes black for several seconds at a time, randomly

You mentioned "intermediate adapters". I'm using a Lenovo Ultradock between my laptop and the monitor. This causes no trouble on my Acer B326HK, which is just as high-res, but the new Samsung monitor continues to do the blackout thing. It's not strictly reproducible so far (fullscreening does

[Kernel-packages] [Bug 1929209] Re: external monitor goes black for several seconds at a time, randomly

Thank you so much, Daniel! The Samsung is new. I'll try some swapping to isolate any hardware problem. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1929209 Title: external monitor

[Kernel-packages] [Bug 1929209] Re: external monitor goes black for several seconds at a time, randomly

Ah, it appears you've tried both an Acer B326HK (Xrandr.txt) and a Samsung U32J59x (XorgLog.txt). If you experience similar problems with both then it suggests the problem is not the monitor but the cable, connectors, adapters (if any) or the laptop. ** Description changed: At times it is

[Kernel-packages] [Bug 1929209] Re: external monitor goes black for several seconds at a time, randomly

Thanks for the log. There doesn't seem to be anything relevant there, at least not for the past few days. So it seems like the kernel isn't aware of the problem. Indeed this looks like a bad cable or bad connection somewhere. Especially if fullscreening a window triggered the problem -- that

[Kernel-packages] [Bug 1929209] Re: external monitor goes black for several seconds at a time, randomly

(Recently,) it only happens when I make something full-screen on the external monitor. I do not think this is a hardware (which is brand new) problem. Just now I made a browser full screen and it immediately strted happening every several seconds for a couple of seconds at a time. I've attached

[Kernel-packages] [Bug 1929209] Re: external monitor goes black for several seconds at a time, randomly

Thanks for the bug report. Issues like this are almost always caused by a bad cable, bad connection, or by using intermediate adapters. So ideally please try a new cable. Also, next time the problem happens please then run: journalctl -b0 > journal.txt and attach the resulting text file here.