Re: [gentoo-user] Strange behaviour disconnecting and reconnecting USB-C screen

[Benjamin Blanz <benjamin.blanz@gmx.de>]

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Hi,
I have the same issue using a usb-c dockingstation.
I have found it is enough to change the resolution of the connected screens to get them back.
Still annoying, but at least the windows are not redistributed.On 11.01.22 10:25, Andreas Fink wrote:

> Hello,
> I've got a new laptop and see a strange behaviour when disconnecting
> and reconnecting my USB-C screen.
> Here are the steps that I am doing. I have a dual screen setup with
> xrandr, with my notebook screen being the primary screen and a second
> large external screen connected via USB-C to my notebook directly.
> Now I disconnect the USB-C cable and do not do anything software wise,
> i.e. my X-Server is still pretending to run on two screens, I can move
> the screen outside of my notebook screen (into the area where the
> external screen).
> Now I reconnect the USB-C cable but the screens stays blank (the the
> screen it says "No USB Type-C connection from your computer"). The only
> way to get a signal again is to first use xrandr to only use my
> notebook screen, and at the exact time udev gets a DRM event, and
> suddently my external monitor appears within xrandr as connected (I did
> not touch the cable, I only ran an xrandr command to use only the
> notebook screen). Right after the DRM event I can run the xrandr
> command to use both screens, but it is annoying to degrade first to one
> screen, because all windows are moved around and I do not end up with
> the same window setup as before.
> 
> Using the same screen with the same experiment as described above but
> with a different notebook the screen is able to pick up the signal
> again, so it's not purely a problem with the external screen.
> Any idea what is going on and how I can workaround it? I just want to
> disconnect the cable and reconnect it without the need to switch any
> xrandr setup.
> 
> Thanks for your ideas and help
> Andreas
> 

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