sddm hangs at __GI___poll (...) at ../sysdeps/unix/sysv/linux/poll.c:41
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
sddm (Ubuntu) |
New
|
Undecided
|
Unassigned |
Bug Description
When booting to "graphical.target" sddm hangs with a flashing text mode cursor at the bottom of tty1. Running "startx" on tty2 successfully starts KDE/Plasma (sddm remains hung).
The the sddm status provided below shows that the sddm start did not finish. The gdm back-trace below shows that sddm hung in __GI___poll (...) at ../sysdeps/
The Ubuntu install is kubuntu-desktop on Ubuntu server 19.10 (64bit) on a 4GB Rasperrypi 4. Note that the same behaviour occurs on the 20.04 daily builds.
--//--
ubuntu@ubuntu:~$ systemctl status sddm
● sddm.service - Simple Desktop Display Manager
Loaded: loaded (/lib/systemd/
Active: active (running) since Sun 2020-03-01 15:07:30 AST; 22min ago
Docs: man:sddm(1)
Process: 1489 ExecStartPre=
Main PID: 1493 (sddm)
Tasks: 2 (limit: 4429)
CGroup: /system.
└─1493 /usr/bin/sddm
Mar 01 15:07:29 ubuntu systemd[1]: Starting Simple Desktop Display Manager...
Mar 01 15:07:30 ubuntu systemd[1]: Started Simple Desktop Display Manager.
Mar 01 15:07:44 ubuntu sddm[1493]: Initializing...
Mar 01 15:07:44 ubuntu sddm[1493]: Starting...
Mar 01 15:07:44 ubuntu sddm[1493]: Logind interface found
ubuntu@ubuntu:~$
--//--
ubuntu@ubuntu:~$ ps -ax | grep sddm
1493 ? Ssl 0:00 /usr/bin/sddm
4524 ? Sl 0:53 /usr/lib/
4903 pts/1 S+ 0:00 grep --color=auto sddm
ubuntu@ubuntu:~$ sudo gdb -p 1493
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Attaching to process 1493
[New LWP 1563]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/aarch64-
0x0000ffff99009a3c in __GI___poll (fds=0xaaaad310
41 ../sysdeps/
(gdb) bt
#0 0x0000ffff99009a3c in __GI___poll (fds=0xaaaad310
#1 0x0000ffff98651d54 in g_main_context_poll (priority=
at ../../.
#2 g_main_
at ../../.
#3 0x0000ffff98651e7c in g_main_
#4 0x0000ffff99582884 in QEventDispatche
#5 0x0000ffff99524ce8 in QEventLoop::exec (this=this@
at ../../include/
#6 0x0000ffff9952d3bc in QCoreApplicatio
#7 0x0000aaaac3159d08 in main (argc=<optimized out>, argv=0xfffff32b
(gdb)
--//--
ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: sddm 0.18.0-1ubuntu2
ProcVersionSign
Uname: Linux 5.3.0-1018-raspi2 aarch64
ApportVersion: 2.20.11-0ubuntu8.4
Architecture: arm64
CurrentDesktop: KDE
Date: Sun Mar 1 15:17:21 2020
SourcePackage: sddm
UpgradeStatus: No upgrade log present (probably fresh install)