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Description of problem:

TigerVNC does not support a typical 9 button mouse.


Version-Release number of selected component (if applicable):

all including upstream source


How reproducible:

Always


Steps to Reproduce:
1.  Own 9-button mouse (L/R/middle, wheel up/down, wheel L/R, back, forward)
2.  view xinput/xev information via vnc and use mouse

Actual results:
first 7 events (through wheel L/R) are sent).  Back/Forward (side buttons) are not sent.


Expected results:
back/Forward buttons work.

Additional info:

https://github.com/TigerVNC/tigervnc/blob/0536d0975bb9e8e4a8aae693bd79157955a896b1/unix/xserver/hw/vnc/Input.c#L47

#define BUTTONS 7

This limit requires non-free software for VDI applications.

Also tested with spice and didn't have the capability of all 7 buttons.

Testing builds:
https://jgrulich.fedorapeople.org/tigervnc/

Hmm, it seems that in the end we cannot fix it this way and actually we cannot fix ithis at all. According to specification the RFB protocol can support only up to 7 mouse buttons. I should have read the specs first.

See https://github.com/TigerVNC/tigervnc/pull/497.

There is possibility of defining a vnc extension, but it doesn't seem to be an easy task and I'm already overhelmed with other packages/bugs. On the other hand you can use the scratch build above where this will work, but it will break compatibility with other VNC server/clients so you can use it only with the exactly same build of tigervnc (both server and the client).