Re: [gentoo-user] Strange behaviour disconnecting and reconnecting USB-C screen
What I would do is create a bash script and link to a keyboard shortcut to execute as needed. One of the advantages of xrandr is the ease of scripting. Lee On Jan 11, 2022 at 1:25 AM, 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
Re: [gentoo-user] Strange behaviour disconnecting and reconnecting USB-C screen
My normal layout #!/bin/sh xrandr --output eDP-1 --mode 1920x1080 --pos 3640x249 --rotate normal --output DP-1 --off --output HDMI-1 --off --output DP-2 --off --output HDMI-2 --off --output DP-1-1 --mode 1920x1080 --pos 0x0 --rotate left --output DP-1-2 --off --output DP-1-2-8 --primary --mode 2560x1600 --pos 1080x46 --rotate normal --output DP-1-2-1 --off --output DP-1-3 --off The layout I switch to to wake the screens up, before then switchign back to the normal layout #!/bin/sh xrandr --output eDP-1 --mode 1920x1080 --pos 3640x498 --rotate normal --output DP-1 --off --output HDMI-1 --off --output DP-2 --off --output HDMI-2 --off --output DP-1-1 --mode 1600x1200 --pos 0x0 --rotate left --output DP-1-2-8 --primary --mode 1920x1600 --pos 1080x46 --rotate normal --output DP-1-2-1 --off --output DP-1-2 --off --output DP-1-3 --off I used arandr to generate the commands and have the assigned to hotkeys On 11.01.22 12:13, Andreas Fink wrote: On Tue, 11 Jan 2022 10:57:28 +0100 Benjamin Blanz wrote: 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: That did not work for me because xrandr complains that any resolution is an unknown mode. Which command do you use to change the resolution of the connected screen? OpenPGP_0x7AAC0ED205503D09.asc Description: OpenPGP public key OpenPGP_signature Description: OpenPGP digital signature
Re: [gentoo-user] Strange behaviour disconnecting and reconnecting USB-C screen
On Tue, 11 Jan 2022 10:57:28 +0100 Benjamin Blanz wrote: > 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: > That did not work for me because xrandr complains that any resolution is an unknown mode. Which command do you use to change the resolution of the connected screen?
Re: [gentoo-user] Strange behaviour disconnecting and reconnecting USB-C screen
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 OpenPGP_0x7AAC0ED205503D09.asc Description: OpenPGP public key OpenPGP_signature Description: OpenPGP digital signature
