9/13/2023 0 Comments Xscope linux![]() ![]() Notice that the window one of the victims (kate) got destroyed and created again. ![]() Xauth -n list :0 | sed s/:0/:1/ | xargs xauth add Did a tap on kwin_x11 (see the attachment for a partial log): Tried to reproduce it again and now I lost 7 windows at once (just a browser window remained). Xscope output showing DestroyNotify+CreateNotify _NET_WM_NAME(UTF8_STRING) = "peter : screen" _NET_WM_NAME(UTF8_STRING) = "peter : journalctl" _NET_WM_NAME(UTF8_STRING) = "peter : bash" $ xdotool search -pid `pidof konsole` | xargs -tn1 xprop _NET_WM_NAME -id Once such a situation happens, windows can be "recovered" usings its Window Id. These packages were built with -DCMAKE_BUILD_TYPE=Debug Qt 5.5.0 (with two patches applied to fix crashes on multi-monitor handling, ). Package versions on Arch Linux (recompiled to include debugging symbols): Some windows get lost from the Task Manager.Īll windows are still available in the Task Manager (or Tab Box), somewhere. Xrandr -output HDMI1 -mode 2560x1440_30 -left-of LVDS1 Open a few windows (for example, konsole with journalctl, another konsole window, System Settings) The location of windows (which of the two monitors) do not seem to have an effect on the victim selection.ġ. ![]() The contents of logfile are listed bellow:Ġ00: : Success, version is 11:0 vendor='The X.When toggling an external monitor via xrandr (iirc also Display Settings), windows would be hidden and unavailable via the Task Manager and Alt-Tab. ![]() To overcome this after we start the fake server as: '-display' option to allow the user choose a display. The messages captured by logfile are inspected using:īack then to our simple program we have to notice that X clients usually make use of an The command that redirects 'fake' display 9 to display 0 is:Īnd then we run the X client program, for instance xtrace (or xeyes) as:Ī number of messages exchanged between the X server and the client appear immediately in theįirst xterm window (the one that runned xtrace -D:9 -d:0). Therefore number 9 is used as a fake display, since rarely a system needs more than one or twoĭisplays. Recall that a second X Server would make use of display 1, and we would be transferred to display 1 by using Ctrl+Alt+F8 (instead Ctrl+Alt+F7 for display 0) and so on. We use display 0, which is in the previous command the display that connections from Using a 'fakedisplay', for instance display 9. To run a X client program under xtrace I downloaded the xtrace packet in UbuntuĪnd I started the xtrace utility from the command line Xtrace fakes an X server and forwards all connections to a real X server, displaying the communication between the clients and the server in an (well, theoretically) human readable form. Next I will run the program using the xtrace utility to have a look behind the scene.įor xtrace we read from the xtrace Debian page: The program's window is the active one in the following image: Package either by using the 'Ubuntu Softtare Center' from the desktop or by using the followingĪnd I take the little white window with the black square, that lives until a key is pressed. In my Ubuntu sytem gcc complained that Xlib.h was missing and I had to download the xorg-dev XSelectInput(d, w, ExposureMask | KeyPressMask) * select kind of events we are interested in */ Prosses Window Close Event through event handler so XNextEvent does Not failĪtom delWindow = XInternAtom( d, "WM_DELETE_WINDOW", 0 ) #include // prevents error for exit on line 18 when compiling with gcc To Compile: gcc -O2 -Wall -o test test.c -L /usr/X11R6/lib -lX11 -lm Simple Xlib application drawing a box in a window. To illustrate the communication between the X client and the X server: (actually the second version of this program we mentioned in section 1.1) We will use the first example of section 1.1 Hands-on Experiment: find the messages exchanged between the X client-server Hands-on Projects for the Linux Graphics Subsystem ![]()
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