Public bug reported:
In a device that has both HDMI ouput *and* a serial console, no log-in
prompt appears in the serial console if no monitor is connected, when
"splash" is added to the kernel command line.
I see plymouthd taking 100% of the CPU. If I connect a monitor, then I
get the serial console and plymouthd stops. That HDMI is connected or
not should not influence the serial console prompt.
plymouthd backtrace shows it waiting for events:
#0 0x0000ffff9a948754 in __GI_epoll_pwait (epfd=3,
events=events@entry=0xffff9aa3e2a0 <events>, maxevents=maxevents@entry=64,
timeout=-1, set=set@entry=0x0)
at ../sysdeps/unix/sysv/linux/epoll_pwait.c:42
#1 0x0000ffff9a9488e0 in epoll_wait (epfd=<optimized out>,
events=events@entry=0xffff9aa3e2a0 <events>, maxevents=maxevents@entry=64,
timeout=<optimized out>)
at ../sysdeps/unix/sysv/linux/epoll_wait.c:32
#2 0x0000ffff9aa1b818 in ply_event_loop_process_pending_events
(loop=0xaaaad24b53e0) at ply-event-loop.c:1230
#3 ply_event_loop_process_pending_events (loop=0xaaaad24b53e0) at
ply-event-loop.c:1210
#4 0x0000ffff9aa1be98 in ply_event_loop_run (loop=0xaaaad24b53e0) at
ply-event-loop.c:1310
#5 0x0000aaaace94c62c in main (argc=4, argv=0xffffefe2d748) at main.c:2294
** Affects: plymouth (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1931718
Title:
No login prompt on serial if no monitor connected
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