Author Topic: Solved: slow start of lazarus 2.2.0 on Ubuntu 20.04.3 and Zorin 16 64-bit.  (Read 1270 times)


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I just upgraded lazarus to version 2.2.0 but the IDE takes a long time (about 20 seconds) to start on Ubuntu 20.04.3 and Zorin 16 64-bit. I got a 'StartLazarus is not responding' dialogbox, I hit 'Wait' a couple of times and after 20 seconds the IDE would start. Once started it seemed to run fine. The debug log revealed nothing but an

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$ strace lazarusshowed that it was waiting here:

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sendmsg(11, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\0", iov_len=1}], msg_iovlen=1, msg_control=[{cmsg_len=28, cmsg_level=SOL_SOCKET, cmsg_type=SCM_CREDENTIALS, cmsg_data={pid=66572, uid=1000, gid=1000}}], msg_controllen=32, msg_flags=0}, MSG_NOSIGNAL) = 1
sendto(11, "AUTH\r\n", 6, MSG_NOSIGNAL, NULL, 0) = 6
recvfrom(11, "REJECTED EXTERNAL\r\n", 4096, 0, NULL, NULL) = 19
sendto(11, "AUTH EXTERNAL 31303030\r\n", 24, MSG_NOSIGNAL, NULL, 0) = 24
recvfrom(11, "OK e94c642743e04e463f111d8861e79"..., 4096, 0, NULL, NULL) = 37
sendto(11, "NEGOTIATE_UNIX_FD\r\n", 19, MSG_NOSIGNAL, NULL, 0) = 19
recvfrom(11, "AGREE_UNIX_FD\r\n", 4096, 0, NULL, NULL) = 15
sendto(11, "BEGIN\r\n", 7, MSG_NOSIGNAL, NULL, 0) = 7
write(14, "\1\0\0\0\0\0\0\0", 8)        = 8
eventfd2(0, EFD_CLOEXEC|EFD_NONBLOCK)   = 13
write(13, "\1\0\0\0\0\0\0\0", 8)        = 8
write(14, "\1\0\0\0\0\0\0\0", 8)        = 8
poll([{fd=13, events=POLLIN}], 1, 25000) = 1 ([{fd=13, revents=POLLIN}])
read(13, "\1\0\0\0\0\0\0\0", 16)        = 8
poll([{fd=13, events=POLLIN}], 1, 25000

A Google search on 'lazarus SCM_CREDENTIALS' revealed that this is a known issue that can be resolved by installing the appmenu-gtk2-module package. You have to logout/login after installing the package.



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Yeah gwiesenekker, its been a problem for awhile.

I suspect appmenu-gtk2-module has not been added to the official list of Lazarus dependencies because its not needed (and may not even be available) by all distributions. In actual fact, appmenu-gtk2-module should really be a dependency of GTK2.

Maybe a note on the Installing on Linux page .....

Lazarus 2, Linux (and reluctantly Win10, OSX)
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That's the main reason why i moved from Ubuntu/Gnome to Manjaro/Cinnamon in late 2019. Never regretted it.

Agree with Davo: Should be on the "Install on Linux"-Wiki with the qualifier "for Debian/Ubuntu"

Though, i admit i haven't checked on my Manjaro if appmenu-gtk2 is installed out-of-the-box or not....
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