/usr/lib/xorg/modules/extensions/libxmir.so: undefined symbol: mir_surface_next_buffer

[pawloch]

after updating to latest mir version, I am unable to start unity in mir, if type=unity is removed in /etc/lightdm/lightdm.conf everything is back and working, but without mir.

unity-system-compositor.log:
...
Initializing built-in extension XFIXES
Initializing built-in extension RENDER
Initializing built-in extension RANDR
Initializing built-in extension COMPOSITE
Initializing built-in extension DAMAGE
Initializing built-in extension MIT-SCREEN-SAVER
Initializing built-in extension DOUBLE-BUFFER
Initializing built-in extension RECORD
Initializing built-in extension DPMS
Initializing built-in extension X-Resource
Initializing built-in extension XVideo
Initializing built-in extension XVideo-MotionCompensation
Initializing built-in extension SELinux
Initializing built-in extension XFree86-VidModeExtension
Initializing built-in extension XFree86-DGA
Initializing built-in extension XFree86-DRI
Initializing built-in extension DRI2
Loading extension GLX
Driver needs flags 1, incompatible with nested, deleting.
Driver needs flags 0, incompatible with nested, deleting.
Driver needs flags 0, incompatible with nested, deleting.
/usr/bin/X: symbol lookup error: /usr/lib/xorg/modules/extensions/libxmir.so: undefined symbol: mir_surface_next_buffer
root@local:/home/kuba/lightdm# cat
lightdm.log unity-system-compositor.log x-2.log
root@local:/home/kuba/lightdm# cat unity-system-compositor.log
dm_connection_start
set_active_session '0'
set_active_session
Unable to set active session, unknown client name 0
Failed to read header

Log file x-2.log in attachement

[Robert Ancell (robert-ancell)]

Does this still occur?

[Daniel van Vugt (vanvugt)]

The bug is in XMir. It needs to be updated to use the new function name(s): mir_surface_swap_buffers(_sync)

[pawloch (pawloch)]

I've just updated, now it's working