I am connecting to a centos system at work using vnc. The work server runs vncserver and I run remmina on my two local Ubuntu laptops (12.04 and 14.04). On either laptop, I can connect to the vnc server without problems. I am using emacs so usually when I want to search for something I type alt+s and it promps me for a string with which to search. However, if I hold down alt+s instead what happens is
1) The blinking cursor jumps to the other window.
2) Often, but not always the left mouse button does not work in emacs. Instead of clicking on things, a hand icon appears that does nothing.
3) Often, but not always. Keyboard keys don't do what I expect them to do. A keyboard shortcut that used to move the curser (eg ctrl+a) for instance now transposes test. Typing into emacs doesn't work.
4) Sometimes, but not always, I loose all control of the vnc window. If I type alt+s enough times I can increase the likelyhood of this symptom.
5) If I disconnect and reconnect from the vnc, everything goes back to normal
I can't duplicate this strange behavior outside of emacs. I also don't get this behaviour when I connect to emacs with ssh and -X.
Also, I looked in the preferences>keyboard section of remmina and there is no keyboard shortcut there pertaining to alt+s. s by itself used to toggle scaled mode, but I changed that to something else just in case. There was no improvement.
Any suggestions for how I can get alt+s to work as expected. Alternatively I'd settle for an explanation of why alt+s does what it does.
edit: Please not that, in contrast to what is described in this post http://ubuntuforums.org/showthread.php?t=2280273 This effect happens when "Grab all keyboard events" is toggled on.
Furthemore, this effect also happens when I use "Remote Desktop Viewer" rather than Remmina.
I can get the same effect if I type [esc] and then s.
