I have an install script that I run after fresh installations to install apps, mount network drives and make changes to several configurations to my liking. One of them is disabling the event sounds.
Up until now I have used this command to achieve that:
gsettings set org.gnome.desktop.sound event-sounds false
However, with 18.04 this command doesn't work anymore. Anyone know which schema and key to use now?
I am trying to find a way to detect the event of a window (any window) being opened in Ubuntu 16.04
I would like to be able to detect the "window open" event and check if the opened window was my sought window and thereafter run a bash script or a C/C++ function.
So far I've found that I can use wmctrl -l to find which windows are already opened. I could use this command and perhaps grep to find if my sought window is opened and then act on this information.
I'd prefer not to poll, as I'd not want the application to stand idle when the window opens. The action should be as "instantaneous" as possible.
Is there an event or signal I could listen for to achieve this? From the kernel, window manager (Compiz) or maybe some log file that changes?
EDIT: To clarify, I have an application (not under my control) which might show a window at any time, this window does not have a title but it does have the WM_CLASS set (the WM_CLASS is the same for all windows of the application). I want to act upon the event that this window is shown (or created, whichever is best/easier).
It doesn't seem like the window is opened "within" the main applications window. Using xwininfo -children -id <window-id> shows that the main application and the sought window are on different branches, connected to "the root window".
The branches looks like this, where R is "the root node"; A is a root node of the main application's branch and Y is the root of the branch with sought window W:
R
/ \
A Y
/\ \
B C X
\ \
Q W
So I'm hoping that I can find the unique structure of Y-X-W
I'm not sure I have to listen to all windows, but it is my assumption that I'll have to check what happens within "the root window" and try to find the sought window.
I keep seeing the above image here on the Ask Ubuntu and I'm curious to know what Ubuntu Global Jam is.
I am facing a very strange problem. Out of the blue, my browser starts refreshing itself infinitely. My first guess was firefox is messing up. I installed chrome. But, it happens in chrome as well.
Other than that, sometimes my home folder automatically opens and keep opening itself infinitely. My next guess was Mouse is faulty. Replace the mouse - but same things.
This happens even if I remove my keyboard.
What can be the reason? This started happening after I installed Ubuntu 10.10 few days back. Earlier on windows, everything was working fine. So, I am a bit skeptical to assume that this is a hardware fault.
How to fix this problem?
UPDATE:
xev gives this kind of result:
KeyPress event, serial 36, synthetic NO, window 0x4200001, root 0xb8, subw 0x0, time 29897358, (237,791), root:(1252,842), state 0x10, keycode 65 (keysym 0x20, space), same_screen YES, XLookupString gives 1 bytes: (20) " " XmbLookupString gives 1 bytes: (20) " " XFilterEvent returns: False
KeyRelease event, serial 36, synthetic NO, window 0x4200001, root 0xb8, subw 0x0, time 29897603, (237,791), root:(1252,842), state 0x10, keycode 65 (keysym 0x20, space), same_screen YES, XLookupString gives 1 bytes: (20) " " XFilterEvent returns: False
Very odd issue today. I was going to post a thread about another issue and wanted to take a screenshot of a terminal window. I got it all prepped, hit Alt+Printscreen and nothing happened.
I went into Keyboard Shortcuts to see if redefining the shortcut worked. It did. I tried to set it back to Alt+Printscreen but the window just sat there listening for a keypress. It's as if I never pushed a key.
Both the Alt and Printscreen keys work independently just fine... I've also tried looking at the output of xev as I press the keys. It hears the Alt press but doesn't hear the Printscreen afterwards.
I've tried this from both within Compiz and plain metacity. I also have a spare keyboard and that shows identical behaviour (one keyboard is PS/2, the spare is USB - so not a port issue).
It's like there's something sitting in the event chain spitting on the event so that nothing else can hear it. My question is basically: how can you find the processes responding to certain events?
As requested:
oli@bert:~$ xmodmap -pke | grep -i mode
keycode 82 = KP_Subtract XF86_Prev_VMode KP_Subtract XF86_Prev_VMode
keycode 86 = KP_Add XF86_Next_VMode KP_Add XF86_Next_VMode
keycode 100 = Henkan_Mode NoSymbol Henkan_Mode
keycode 203 = Mode_switch NoSymbol Mode_switch
And
oli@bert:~$ xmodmap -pke | grep -i print
keycode 107 = Print Sys_Req Print Sys_Req
keycode 218 = Print NoSymbol Print
Edit: When I posted this I was on Lucid with a home-built 2.6.35 kernel. It turns out my issue is related to the kernel and not X.
Somebody somewhere has decided that alt-printscreen should render a SysRq event. Technically speaking, perhaps it should but this breaks what-must-be over a decade of Linux and Windows "known behaviour".