View Full Version : [ubuntu] Working on Dual Monitor Fullscreen Flash Fix

August 20th, 2011, 06:29 PM
I am working on this fix in Ubuntu Lucid Lynx 10.04 with gnome and compiz

I've had problems with Flash, namely it opening on the wrong monitor, and not staying in fullscreen when other applications are focused. I was able to move the flash fullscreen window (or any other window for that matter) to the other monitor using an sh script I will show you later in this thread.

However it has a few issues if your monitors have different resolutions:
- Sometimes the fullscreen video will have the aspect ratio of the Monitor that spawned it, so the browser window should be in the window you will want to watch the video in.

- Sometimes the fullscreen video will have the aspect ratio of the Monitor that it spawns in, and will not resize when moved to a different Monitor.
For this script you need the xdotool and wmctrl packages which you can get by typing the following command in a terminal:

sudo apt-get install xdotool && sudo apt-get install wmctrlNow you create an empty file with an .sh extension, I named mine "move-window-monitor.sh" and paste the following code in it:
NOTE: you might have to modify the screen_width1 and screen_width2 values to match your left (1) and right (2) monitor horizontal resolution (my monitors are 1680x1050 and 1920x1080)


# screen width

# active window
window=`xdotool getactivewindow`

# get active window size and position
x=`xwininfo -id $window | grep "Absolute upper-left X" | awk '{print $4}'`
w=`xwininfo -id $window | grep "Width" | awk '{print $2}'`


# window on left monitor
if [ "$x" -lt "$screen_width1" ]; then
if [[ "$w" -eq "$screen_width1" ]]; then

if $maximized; then
wmctrl -r :ACTIVE: -b remove,maximized_vert,maximized_horz

wmctrl -r :ACTIVE: -e 0,$screen_width1,-1,-1,-1

if $maximized; then
wmctrl -r :ACTIVE: -b add,maximized_vert,maximized_horz

# window on right monitor
if [[ "$w" -eq "$screen_width2" ]]; then

if $maximized; then
wmctrl -r :ACTIVE: -b remove,maximized_vert,maximized_horz

wmctrl -r :ACTIVE: -e 0,0,-1,-1,-1

if $maximized; then
wmctrl -r :ACTIVE: -b add,maximized_vert,maximized_horz

NOTE: I did not create this script, I found it on http://sabel.bluegfx.de/2011/05/30/linux-aktives-fenster-auf-anderen-monitor-verschieben/ and modified it a bit to fit my needs.

now you will have to make the file executable by entering the following command in a terminal:

sudo chmod +x move-window-monitor.shnow go to System/Preferences/Keyboard Shortcuts
add a custom shortcut and enter move-window-monitor.sh as command and assign it to a key (I use the WinKey+Left and WinKey+Right both linked to this command).

Now whenever you press your key combination, the active window will be moved to the other monitor. Note that your Flash Fulllscreen window will not be the active window by default when opened, so you will usually have to click inside of it (I usually click Play/Pause twice).

What is left to be done / Might be possible to archieve:
I've tried resizing the fullscreen window by using

wmctrl -r :ACTIVE: -e 0,1680,0,1920,1080Syntax: wmctrl -r :ACTIVE: -e gravity,x-pos,y-pos,width,height

wmctrl -r :ACTIVE: -b add,maximized_vert,maximized_horzWhich results in an increase of the flash window container size. However, the Video stays the same size and doesnt adapt to the window size. This means that there will be an invisible Window around the flash video that you cannot click through.
HOWEVER - somewhere along these tries the flash video became resistant to losing focus - meaning I could work in a different window while the flash stays fullscreen.

What I could use help with:
What I am looking for is a better way to target the flash window so it doesnt have to be the active window. Since it is very hard to capture the window class, I was only able to use

sleep 5 && wmctrl -lto get the window title, which is <unknown> so not necessarily very unique.

What would also be very nice is some kind of script that would help resize the flash to fit the window/screen size. Maybe by using a GreaseMonkey Script. But this is beyond my skillset and experience, so it might take some time to research and figure that one out.

Known Problems
The script will not work properly on Firefox windows if using the Hide Caption Titlebar Plus firefox addon. It will still work on the Flash Fullscreen window spawned by firefox.

December 27th, 2012, 08:37 AM
Or you if you're talking about this issue with the Adobe Flash plugin you could just goto my post about this issue in another thread http://ubuntuforums.org/showthread.php?t=2005391

Note: I'm using Ubuntu 12.10 64bit but this should work for anythign since you're editing the Adobe plugin directly.