[ On reply to Error while launching any macro - Linux machine ]
Dear ROOT-aficionados,
Same problem here with the Fedora 30 stable release. Standard package from @fedora DNF/YUM repo fails to launch any graphical feature. Batch mode seems fine though.
Latest attempt:
Error in <RootX11ErrorHandler>: GLXBadContext (XID: 39846029, XREQ: 150)
[xcb] Unknown sequence number while processing queue
[xcb] Most likely this is a multi-threaded client and XInitThreads has not been called
[xcb] Aborting, sorry about that.
root.exe: xcb_io.c:263: poll_for_event: Assertion `!xcb_xlib_threads_sequence_lost' failed.
Will use a source-compiled version for the time being, but I guess a few people might be interested in a new RPM version (Fedora 30 is already 8 days old 
)!
Many thanks in advance!
ROOT Version: 6.16/00
Platform: Fedora 30
Compiler: linuxx8664gcc