Questions tagged [xephyr]

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SELinux sandboxed firefox has no audio

Running firefox in a SELinux sandbox using this script: Random variables for directories, Allowing multiple instances SEhome=$(cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 8 | head -n 1) SEtemp=$(...
ministry's user avatar
0 votes
0 answers
54 views

firejail --x11=xephyr goes to sleep after 10 minutes

I run any program through Firejail using the option X11 xephyr (to isolate X11). A separate program window opens as it should, but after 10 minutes of inactivity the screen goes dark. If you move the ...
MyCheck's user avatar
-6 votes
1 answer
337 views

How can I mitigate the keylogging issue of Xorg?

My plan is to: Turn off listening to all sockets, and initiate X through a command such as: Xorg -nolisten tcp -nolisten inet -nolisten inet6 -nolisten unix -nolisten local :0 -seat seat0 vt7 -...
Chris98's user avatar
  • 45
1 vote
0 answers
91 views

Can I make Xephyr toggle user keyboard and mouse?

I need to pilot an X application with my PC, to take scientific measuring. I have an xdotool script which does the job pretty well, but while it's running, I cannot use my PC, which is frustrating and ...
Alessandro Bertulli's user avatar
1 vote
0 answers
71 views

Slackware(64) 14.2 + Xephyr using chroot, umount partitions

This Exact Same Question i first time i do was ib -> https://www.linuxquestions.org/questions/showthread.php?p=6366697#post6366697 i need improve my script : For close the Xephyr window ...
Inukaze's user avatar
  • 47
1 vote
0 answers
91 views

XDMCP locally using Unix sockets

Is there any way to start a XDMCP session, say with Xephyr in LightDM, locally through Unix Sockets instead of IP? For performance I was wondering if, somehow, I can avoid any network stack working ...
igorkattar's user avatar
3 votes
1 answer
835 views

Almost multiseating with Xephyr

With swaywm I'm almost multiseating (two people simultaneously using the same computer) with two keyboards, two mice and one GPU with two outputs. At the start of the sway session, one nested X ...
igorkattar's user avatar
5 votes
1 answer
1k views

Mouse and keyboard not getting captured by Xephyr

So, I started a Xephyr window: Xephyr -br -ac -noreset -screen 1280x720 :1 and then started xfce4 inside of that Xephyr X server: Export DISPLAY=:1 startxfce4 This all works fine, but now I want to ...
TT-392's user avatar
  • 147
0 votes
1 answer
169 views

Slackware(64) 14.2 + chroot + xfce4-session + audio + (NV-)GLX?

Just to make it easier to mount my Slackware 14.2 Installation, I put it on another partition (it's 32 Bits 100% real native). I can start xfce4-session like root user (but that is not the thing I ...
Inukaze's user avatar
  • 47
0 votes
0 answers
52 views

Chaosreader + Xephyr replay X11

How to replay Chaosreader X11.replay session? I tried this: Xephyr -br -ac -noreset :1 DISPLAY=:1 ./session_0001.X11.replay But got ERROR42: Can't connect to X11 daemon on 127.0.0.1:6001 at ./...
Nikon Podgorny's user avatar
1 vote
2 answers
1k views

Xephyr - no gpu acceleration?

I am making heavy use of Xephyr for x11 isolation. However,acceleration does not work at all. 3d programs simply do not run, video decoding does not work, vdpau does not work, things like chromium and ...
sugond desenuts's user avatar
9 votes
1 answer
4k views

How does one run GNOME Shell in a window? (nested session)

I am running GNOME Shell under Wayland and I would like to debug extensions in a nested session so that I don't have to restart the compositor, how can I do that?
Scrooge McDuck's user avatar
2 votes
1 answer
2k views

What's the difference between Xpra and Xephyr?

I'm curious as to which of the two is the more tested and generally approved way of sandboxing X11. Both are available in my distributions official repository, but I don't know which one I should ...
user431715's user avatar
3 votes
1 answer
6k views

Xephyr: server does not have extension for -dpms option

when I open new openbox session in Xephyr, the screen goes blank after 10 minutes of inactivity. How can I disable this ? I tried this command: xset -dpms s off but get following error: server does ...
Martin Vegter's user avatar
0 votes
1 answer
338 views

Can't click button of firefox when I run it within firejail + xephyr

I run firefox with the following command: firejail --x11=xephy firefox The command usually opens a firefox window (800x600) that fills the xephyr window (800x600). In this case, the following ...
Duh Huh's user avatar
  • 49
3 votes
2 answers
2k views

Shared clipboard between multiple X11 servers (Xephyr, Xpra etc.)

I plan to run potentially dangerous applications (browser, etc.) on a separate X-server, but since each server has its own clipboard, it is impossible to copy the link / text from one window to ...
Dstart's user avatar
  • 445
0 votes
1 answer
1k views

-dpi option of Xephyr

What does the -dpi option of Xephyr do. I'm trying different values like this: Xephyr -dpi 20 -screen 640x480 :1 and the programs running in the session don't look different in any way.
fctorial's user avatar
  • 203
0 votes
1 answer
1k views

Xephyr -ac dangerously?

Classic command to run Xephyr: Xephyr -br -ac -noreset -screen 800x600 :1 As far as I understand, the -ac key is an analogue of xhost +, and this is a vulnerability, because almost everyone can ...
My5555's user avatar
  • 3
1 vote
0 answers
291 views

starting Xephyr server with auth for some other user

I have a situation where user0, with access to display :0 on the localhost, needs to run Xephyr :1 such that this Xephyr server is only accessible to user1 clients on the localhost. Is this ...
schmeg's user avatar
  • 21
2 votes
1 answer
355 views

High CPU usage inside Xephyr and Xvnc

I have a GUI application that I want to test in parallel by running my tests in different X-servers. To do that I start the application using Xephyr or Xvnc, then I start the script to do the testing, ...
klaus's user avatar
  • 181
0 votes
0 answers
1k views

Xephyr and xorg process

I run Xephyr:Xephyr -ac -screen 1024x768 -br -reset -terminate 2> /dev/null :1 & and then I can run there some window: export DISPLAY=:1 xterm & When I check xorg processes ps ax | grep ...
Irbis's user avatar
  • 239
2 votes
0 answers
356 views

Xephyr - Two Displays as extended view

I have a wide monitor and I would like to use Xephyr or any other option to create two displays as extended view. Why? I use to connect to a remote server (RDP) that has two monitors and I am able to ...
Emerson Soares's user avatar
3 votes
1 answer
4k views

Xephyr: Low FPS inside 3D accelerated games

I'm trying to use Xephyr to create a gaming multiseat setup. Inside the existing desktop environment, I'm running sudo Xephyr -softCursor -dpi 96 -screen 1440x900 -keybd evdev,,device=/dev/input/by-id/...
simplegamer's user avatar
4 votes
2 answers
1k views

How to launch Xephyr without sleep-ing

The goal is to launch Xephyr in a script. The most popular approach is this: Xephyr :4 & sleep 1 # or sleep 2 launch_your_program_here Let's see what happens here. First, unfortunately, Xephyr ...
VasyaNovikov's user avatar
  • 1,246
4 votes
3 answers
3k views

Xephyr: keyboard mapping not working properly

When I start Xephyr and LXDE session inside: $ Xephyr :1 -screen 1920x1054 -nolisten tcp -reset -terminate $ DISPLAY=:1 startlxde some keys are not working properly, such as Up, PageUp, PageDown. ...
Martin Vegter's user avatar
2 votes
2 answers
684 views

qt4 applications don't work in Xephyr

I am using Xephyr to run applications as another user, while being logged in as primary user. Most applications work fine in Xephyr, except qt4 based. Specifically: electrum ipython qtconsole ...
Martin Vegter's user avatar
2 votes
2 answers
5k views

Running more than one console X session with startx at the same time

I have xfce running in display 0 (accessible via Ctrl + Alt + F1). I press Ctrl + Alt + F2 and type startx (attempting to run more than one window manager at the same time) and receive the error "...
DD43's user avatar
  • 41
3 votes
1 answer
2k views

Xephyr: mouse does not move smoothly

I am using xserver-xephyr in Debian Wheezy. My mouse inside the Xephyr window does not move smoothly. It looks as if the refresh rate was very low. When I move my mouse across the screen, it maybe ...
Michael Boies's user avatar
7 votes
1 answer
9k views

emulate key-combination with xdotool

I am using Xephyr as a nested X server. When I am in Xephyr window and pres the key combination Control_L+Shift_L, Xephyr grabs my input (mouse, keyboard). This grab can be released with Control_R+...
Michael Boies's user avatar
3 votes
0 answers
1k views

setting up nested X sessions with Xephyr properly (and securely)

I am trying to set up Xephyr properly and securely, so that I can run another (nested) instance of LXDE under a different user inside my primary LXDE session. I would like to use this nested session ...
Martin Vegter's user avatar
6 votes
2 answers
3k views

Screenshots from multiple Xservers

I want to take screenshots simultaneously from multiple X servers on one desktop PC. I have multiple users logged in different terminals (tty1, tty2, tty3, tty4) who start multiple Xservers with ...
Konstantinos's user avatar
  • 1,120
1 vote
1 answer
1k views

X11 forwarding over ssh [closed]

I used to log into a remote server on our corporate network using Xephyr and ssh using the following command Xephyr :0 -ac -br -screen 950x540 | xterm -bg black -fg white -display :0 -e ssh -Yf ...
jti107's user avatar
  • 53
2 votes
0 answers
422 views

Xephyr Resolution Issue

Whenever I try to connect to Ubuntu using Xephyr, I always get it with the resolution set to 1600x1200, even though, I specified the switch -screen 1024x768 when running it. Questions Where is the ...
SHW's user avatar
  • 14.8k