Hello
After upgrade from stretch to buster, sddm failed to start.
There was a black screen with a mouse cursor.
All that was logged was that it failed to start.
lightdm works. I plan to use lightdm, but hope that this information is
useful to someone else.
lspci -vnn | grep VGA -A 12
01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GM107GL
[Quadro K620] [10de:13bb] (rev a2) (prog-if 00 [VGA controller])
Subsystem: Hewlett-Packard Company GM107GL [Quadro K620]
[103c:1098]
Flags: bus master, fast devsel, latency 0, IRQ 127
Memory at d2000000 (32-bit, non-prefetchable) [size=16M]
Memory at c0000000 (64-bit, prefetchable) [size=256M]
Memory at d0000000 (64-bit, prefetchable) [size=32M]
I/O ports at 3000 [size=128]
[virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
Capabilities: [60] Power Management version 3
Capabilities: [68] MSI: Enable+ Count=1/1 Maskable- 64bit+
Capabilities: [78] Express Legacy Endpoint, MSI 00
Capabilities: [100] Virtual Channel
Capabilities: [250] Latency Tolerance Reporting
01:00.1 Audio device [0403]: NVIDIA Corporation Device [10de:0fbc] (rev a1)
lsmod | egrep nvidia
nvidia_drm 49152 8
drm_kms_helper 200704 1 nvidia_drm
drm 483328 11 drm_kms_helper,nvidia_drm
nvidia_modeset 1097728 22 nvidia_drm
nvidia 17936384 959 nvidia_modeset
ipmi_msghandler 65536 2 ipmi_devintf,nvidia
-- Subject: A stop job for unit sddm.service has finished
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- A stop job for unit sddm.service has finished.
--
-- The job identifier is 14404 and the job result is done.
Mon 2019-07-08 21:40:29.266468 CDT
[s=8406d0a7304e4860a4f87a7d78fb71df;i=d09;b=2
_BOOT_ID=25708d710fea49e1b4154de7548f3703
_MACHINE_ID=24e873818f6e47e3b94495aba7a617d1
_HOSTNAME=jm2
PRIORITY=4
SYSLOG_FACILITY=3
SYSLOG_IDENTIFIER=systemd
_UID=0
_GID=0
_SELINUX_CONTEXT=unconfined
_CAP_EFFECTIVE=3fffffffff
_TRANSPORT=journal
_PID=1
_COMM=systemd
_EXE=/lib/systemd/systemd
_CMDLINE=/sbin/init
_SYSTEMD_CGROUP=/init.scope
_SYSTEMD_UNIT=init.scope
_SYSTEMD_SLICE=-.slice
CODE_FILE=../src/core/unit.c
UNIT=sddm.service
CODE_LINE=1680
CODE_FUNC=unit_start_limit_test
MESSAGE=sddm.service: Start request repeated too quickly.
INVOCATION_ID=6f6940167f32486d8ab80ea628263e19
_SOURCE_REALTIME_TIMESTAMP=1562640029266468
Mon 2019-07-08 21:40:29.266484 CDT
[s=8406d0a7304e4860a4f87a7d78fb71df;i=d0a;b=2
_BOOT_ID=25708d710fea49e1b4154de7548f3703
_MACHINE_ID=24e873818f6e47e3b94495aba7a617d1
_HOSTNAME=jm2
PRIORITY=4
SYSLOG_FACILITY=3
SYSLOG_IDENTIFIER=systemd
_UID=0
_GID=0
_SELINUX_CONTEXT=unconfined
_CAP_EFFECTIVE=3fffffffff
_TRANSPORT=journal
_PID=1
_COMM=systemd
_EXE=/lib/systemd/systemd
_CMDLINE=/sbin/init
_SYSTEMD_CGROUP=/init.scope
_SYSTEMD_UNIT=init.scope
_SYSTEMD_SLICE=-.slice
CODE_FILE=../src/core/unit.c
UNIT=sddm.service
CODE_LINE=5499
CODE_FUNC=unit_log_failure
MESSAGE_ID=d9b373ed55a64feb8242e02dbe79a49c
UNIT_RESULT=exit-code
MESSAGE=sddm.service: Failed with result 'exit-code'.
INVOCATION_ID=6f6940167f32486d8ab80ea628263e19
_SOURCE_REALTIME_TIMESTAMP=1562640029266484
-- Subject: Unit failed
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- The unit sddm.service has entered the 'failed' state with result
'exit-code'.
Mon 2019-07-08 21:40:29.266685 CDT
[s=8406d0a7304e4860a4f87a7d78fb71df;i=d0b;b=2
_BOOT_ID=25708d710fea49e1b4154de7548f3703
_MACHINE_ID=24e873818f6e47e3b94495aba7a617d1
_HOSTNAME=jm2
PRIORITY=3
SYSLOG_FACILITY=3
SYSLOG_IDENTIFIER=systemd
_UID=0
_GID=0
_SELINUX_CONTEXT=unconfined
_CAP_EFFECTIVE=3fffffffff
CODE_FILE=../src/core/job.c
CODE_LINE=950
CODE_FUNC=job_log_done_status_message
JOB_TYPE=start
_TRANSPORT=journal
_PID=1
_COMM=systemd
_EXE=/lib/systemd/systemd
_CMDLINE=/sbin/init
_SYSTEMD_CGROUP=/init.scope
_SYSTEMD_UNIT=init.scope
_SYSTEMD_SLICE=-.slice
UNIT=sddm.service
JOB_RESULT=failed
MESSAGE_ID=be02cf6855d2428ba40df7e9d022f03d
MESSAGE=Failed to start Simple Desktop Display Manager.
INVOCATION_ID=6f6940167f32486d8ab80ea628263e19
JOB_ID=14404
_SOURCE_REALTIME_TIMESTAMP=1562640029266685
-- Subject: A start job for unit sddm.service has failed
-- Defined-By: systemd
-- Support: https://www.debian.org/support
--
-- A start job for unit sddm.service has finished with a failure.
--
-- The job identifier is 14404 and the job result is failed.
Thanks.
John
--
------------------------------------------------------------------------
John Moyer
https://www.rsok.com/~jrm/