Ctrl Key not sent from Viewer to Server

[Mark Dlastname]

Hi,

I am using the 1.7.0 Viewer in -listen mode under Debian Jessie Linux

For Server I am using Ultra VNC Single Click under Windows.

All is working nicely, except that the Ctrl key does not seem to be being passed from Viewer to Server.

Examples:

Ctrl-c displays "c" rather than performing copy.

Ctrl-click items in a list does not select multiple items.

Other viewers seem to pass Ctrl properly.

Any suggestions of where to look would be much appreciated!

Thanks!

Mark

[Pierre Ossman]

Start the client with debug logging and you should be able to see what
it sends when you press the Ctrl key:

https://github.com/TigerVNC/tigervnc/wiki/Debug-Logs

Regards
--
Pierre Ossman Software Development
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A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?

[Mark Dlastname]

Thanks, Pierre.

Here is Ctrl-c then release of Ctrl

 Viewport:    Key pressed: 0x0036 => XK_c (0x0063)
 Viewport:    Key released: 0x0036 => XK_c (0x0063)
 Viewport:    Unexpected release of key code 37

It appears that viewer sees the release of Ctrl but not the press.

Do you have a suggestion on where I should look?

Thanks again,

Mark

[Pierre Ossman]

On 10/12/16 06:21, Mark Dlastname wrote:
> Thanks, Pierre.
>
> Here is Ctrl-c then release of Ctrl
>
> Viewport: Key pressed: 0x0036 => XK_c (0x0063)
> Viewport: Key released: 0x0036 => XK_c (0x0063)
> Viewport: Unexpected release of key code 37
>
> It appears that viewer sees the release of Ctrl but not the press.
>
> Do you have a suggestion on where I should look?
>

Well that's just weird. Any special software on this machine that might
grab Ctrl? E.g. some shortcut software?

[Mark Dlastname]

I haven't been able to figure out anything that would be doing that.

Ctrl works locally OK.

The Alt-key is passed properly by the viewer.

I can run showkey in terminal and see 29 press and 29 release

[Pierre Ossman]

On 13/12/16 17:40, Mark Dlastname wrote:
> I haven't been able to figure out anything that would be doing that.
>
> Ctrl works locally OK.
>
> The Alt-key is passed properly by the viewer.
>

Could you try running xev:

$ xev -event keyboard

And see what it says when you press the Ctrl key.

Also try the right control key, in case that behaves differently.

[Mark Dlastname]

Pierre, thanks so much for your help. This was a great clue and ctrl is now working properly with viewer.

I did much more digging and found that it is caused by a Gnome bug.

I am including the solution and bug info here for reference so that it might help someone else who is experiencing the same problem.

Solution: Using GNOME tweak tool; under Keyboard & Mouse make sure "Show location of pointer" is disabled.

Bug info: https://bugzilla.gnome.org/show_bug.cgi?id=761563

Thanks again!!

Mark

[Scott Leblanc]

Thank you for this solution, I've been having a similar problem for some time now and this suggestion resolved my issue. I did not realize how much I relied on this function until it was not working properly.

Thanks, Pierre and Mark for this insight.

Thank you,

Scott