Comment 6 for bug 247669

Sounds great - thanks for highlighting it

Neil

2009/3/23 William Loucks <email address hidden>:
> TigerVNC ( http://www.tigervnc.com/ ) appears to be doing exactly what
> we need: providing a libvnc.so which works with the newer modular Xorg
> versions (1.4 and higher). TigerVNC is planned for release with Fedora
> Core 11. Let's just hope we can interest some Ubuntu developers in
> building it against Ubuntu 8.04 "Hardy" and 8.10 "Intrepid" and 9.04
> "Jaunty".
>
> --
>  vnc4: vnc4server: libvnc.so crashes Xorg 1.4 on remote keypress or mouseclick
> https://bugs.launchpad.net/bugs/247669
> You received this bug notification because you are a direct subscriber
> of the bug.
>
> Status in “vnc4” source package in Ubuntu: Confirmed
> Status in “vnc4” source package in Fedora: Fix Released
>
> Bug description:
> Binary package hint: vnc4server
>
> Using the libvnc.so module in Xorg 1.4.
>
> On first keypress or mouseclick by vnc client, Xorg log on vnc server
> side shows:
>
> Backtrace:
> 0: /usr/bin/X11/X(xf86SigHandler+0x6a) [0x483d5a]
> 1: /lib/libc.so.6 [0x2aeb4a768100]
> 2: /usr/lib/xorg/modules/extensions//libvnc.so(_ZN14XserverDesktop8keyEventEjb+0x8b) [0x2aeb4cd1838b]
> 3: /usr/lib/xorg/modules/extensions//libvnc.so(_ZN3rfb16VNCSConnectionST8keyEventEjb+0x103) [0x2aeb4cd2f213]
> 4: /usr/lib/xorg/modules/extensions//libvnc.so(_ZN3rfb16VNCSConnectionST15processMessagesEv+0x30) [0x2aeb4cd2f300]
> 5: /usr/lib/xorg/modules/extensions//libvnc.so(_ZN14XserverDesktop13wakeupHandlerEP6fd_seti+0xf6) [0x2aeb4cd17c06]
> 6: /usr/lib/xorg/modules/extensions//libvnc.so [0x2aeb4cd0fdd9]
> 7: /usr/bin/X11/X(WakeupHandler+0x4e) [0x4526ee]
> 8: /usr/bin/X11/X(WaitForSomething+0x204) [0x560e04]
> 9: /usr/bin/X11/X(Dispatch+0x9a) [0x44e8aa]
> 10: /usr/bin/X11/X(main+0x47d) [0x436c1d]
> 11: /lib/libc.so.6(__libc_start_main+0xf4) [0x2aeb4a7541c4]
> 12: /usr/bin/X11/X(FontFileCompleteXLFD+0x279) [0x435f59]
>
> Fatal server error:
> Caught signal 11. Server aborting
>
> >From the Debian bug 444697, there apparently is an ABI change in Xorg 1.4 that breaks this. The xorg-xerver bits in this package are too old (1.0.2) to work with 1.4.1 that is in the xserver-xorg-core package now.
>
> Be advised that Debian bug 444697 "fixes" this bug by REMOVING libvnc.so. Quote:
> "Removed libvnc.so that do not work with recent xorg. This is a workaround but solves the grave fault, closes: #444697."
>
> This tacitly suggests that Xorg does not support libvnc.so at this time. In any case bug 444697 does not solve the problem. Debian merely removed the feature that fails and closed the bug. From a project management standpoint, the non-working libvnc.so is now orphaned and completely untracked (there is no bug I can find that tracks non-working libvnc.so). The closing of Debian bug 444697 implies it was fixed when it was not.
>