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#1 2025-09-23 16:11:01
- trardokont
- Member
- Registered: 2019-01-20
- Posts: 9
[SOLVED] Unable to log in after update to 6.16.8.arch2-1 via lightdm
Hello. After updating to linux 6.16.8.arch2-1 the lightdm login screen does not start up at all. The linux-lts 6.12.48-1 kernel works just fine. At first I attempted to rebuild the kernels and grub, however that did not help. I also attempted to rebuild the following packages just to be sure, but still the normal kernel does not bring up the login screen, and the LTS works just fine Packages rebuilt:
linux 6.16.8.arch2-1
linux-api-headers 6.16-2
linux-firmware-atheros 20250917-1
linux-firmware-broadcom 20250917-1
linux-firmware-cirrus 20250917-1
linux-firmware-intel 20250917-1
linux-firmware-mediatek 20250917-1
linux-firmware-nvidia 20250917-1
linux-firmware-other 20250917-1
linux-firmware-realtek 20250917-1
linux-firmware-whence 20250917-1
linux-headers 6.16.8.arch2-1
linux-lts 6.12.48-1
linux-lts-headers 6.12.48-1
lightdm 1:1.32.0-6
lightdm-gtk-greeter 1:2.0.9-1
lightdm-gtk-greeter-settings 1.2.3-3
lib32-nvidia-utils 580.82.09-1
nvidia 580.82.09-4I did check the News sections, on the official site, here and via RSS and saw nothing concerning and thought it would be safe to update. Also I am using XFCE 4.20 and GTK 3.24.50
Here is the log from the failing boot and for the successful LTS boot. Looking at the output I am not able to see anything that could point me to what the cause of this could be. Sometimes lightdm starts up normally and I am able to log in with the mainline kernel and sometimes there are instances where it does not load and I am left on a black screen In those cases, I switch to a tty and restart the lightdm.service and then I can log in. One thing I did notice is that the lightdm greeter user icon change back to the default one. The service itself is enabled, per systemctl. I am not sure if I am missing something in the logs, however I can't explain this behavior. Any advice would be appreciated.
Last edited by trardokont (2025-09-24 13:32:44)
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#2 2025-09-23 20:22:28
- feinedsquirrel
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- Registered: 2020-12-11
- Posts: 40
Re: [SOLVED] Unable to log in after update to 6.16.8.arch2-1 via lightdm
I've had weird graphics behavior today as well, after getting 6.16.8.arch2-1 this morning. Don't know if it has fixed it, but I just received 6.16.8.arch3-1 a few minutes ago. Update to that and see if it fixes your issue.
As a side note, I've never had luck using a display manager. Consider configuring what you need manually, and login always from the console.
See https://wiki.archlinux.org/title/Xinit# … X_at_login and https://wiki.archlinux.org/title/Autostarting
The first one is for X, but works equally well for a wayland compositor. Just replace "startx" with the window manager of choice.
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#3 2025-09-24 04:49:18
- trardokont
- Member
- Registered: 2019-01-20
- Posts: 9
Re: [SOLVED] Unable to log in after update to 6.16.8.arch2-1 via lightdm
Just updated to 6.16.8.arch3-1, problem still persist. Will check out those links later today and see if they help.
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#4 2025-09-24 07:54:22
- luksol
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- Registered: 2025-09-24
- Posts: 1
Re: [SOLVED] Unable to log in after update to 6.16.8.arch2-1 via lightdm
Similar issue here. Launching from terminal did the trick, although this is definitely not a preferred solution for me it will do for now
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#5 2025-09-24 12:00:45
- seth
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- From: Don't DM me only for attention
- Registered: 2012-09-03
- Posts: 68,325
Re: [SOLVED] Unable to log in after update to 6.16.8.arch2-1 via lightdm
Sep 23 10:59:38 phobos systemd[1]: Started Session c1 of User lightdm.
Sep 23 10:59:38 phobos systemd[1135]: Finished Update XDG user dir configuration.
Sep 23 10:59:38 phobos systemd[1135]: Reached target Main User Target.
Sep 23 10:59:38 phobos systemd[1135]: Startup finished in 215ms.
Sep 23 10:59:41 phobos NetworkManager[821]: <info> [1758614381.0609] policy: auto-activating connection 'Javor_2_4_EXT 1' (dc5293ac-8016-4eda-afcf-599ceaa325c8)
…
Sep 23 10:59:43 phobos NetworkManager[821]: <info> [1758614383.3756] policy: set 'Javor_2_4_EXT 1' (wlp47s0) as default for IPv6 routing and DNS
Sep 23 10:59:46 phobos systemd-logind[825]: Power key pressed short.
Sep 23 10:59:46 phobos systemd-logind[825]: Powering off...
Sep 23 10:59:46 phobos systemd-logind[825]: System is powering down.
Sep 23 10:59:46 phobos systemd[1]: Stopping Session c1 of User lightdm...Please post your Xorg log and your lightdm log (both found in /var/log)
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#7 2025-09-24 12:46:58
- seth
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- From: Don't DM me only for attention
- Registered: 2012-09-03
- Posts: 68,325
Re: [SOLVED] Unable to log in after update to 6.16.8.arch2-1 via lightdm
Unsuspicious, the lightdm log shows the login of the user emil into an xfce session.
Try to switch to another TTY and check
DISPLAY=:0 xrandr -qOnline
#8 2025-09-24 13:10:17
- trardokont
- Member
- Registered: 2019-01-20
- Posts: 9
Re: [SOLVED] Unable to log in after update to 6.16.8.arch2-1 via lightdm
Here is the output of
DISPLAY=:0 xrandr -qScreen 0: minimum 320 x 200, current 1920 x 1200, maximum 16384 x 16384
eDP-1 connected primary 1920x1200+0+0 (normal left inverted right x axis y axis) 345mm x 215mm
1920x1200 165.00*+ 59.88 59.95
1920x1080 60.01 59.97 59.96 59.93
1600x1200 85.00 75.00 70.00 65.00 60.00
1680x1050 59.95 59.88
1400x1050 74.76 59.98
1600x900 59.99 59.94 59.95 59.82
1280x1024 85.02 75.02 60.02
1400x900 59.96 59.88
1280x960 85.00 60.00
1440x810 60.00 59.97
1368x768 59.88 59.85
1280x800 59.99 59.97 59.81 59.91
1152x864 75.00
1280x720 60.00 59.99 59.86 59.74
1024x768 85.00 75.05 60.04 85.00 75.03 70.07 60.00
1024x768i 86.96
960x720 85.00 75.00 60.00
928x696 75.00 60.05
896x672 75.05 60.01
1024x576 59.95 59.96 59.90 59.82
960x600 59.93 60.00
832x624 74.55
960x540 59.96 59.99 59.63 59.82
800x600 85.00 75.00 70.00 65.00 60.00 85.14 72.19 75.00 60.32 56.25
840x525 60.01 59.88
864x486 59.92 59.57
700x525 74.76 59.98
800x450 59.95 59.82
640x512 85.02 75.02 60.02
700x450 59.96 59.88
640x480 85.09 60.00 85.01 72.81 75.00 59.94
720x405 59.51 58.99
720x400 85.04
684x384 59.88 59.85
640x400 59.88 59.98 85.08
576x432 75.00
640x360 59.86 59.83 59.84 59.32
640x350 85.08
512x384 85.00 75.03 70.07 60.00
512x384i 87.06
512x288 60.00 59.92
416x312 74.66
480x270 59.63 59.82
400x300 85.27 72.19 75.12 60.32 56.34
432x243 59.92 59.57
320x240 85.18 72.81 75.00 60.05
360x202 59.51 59.13
360x200 85.04
320x200 85.27
320x180 59.84 59.32
320x175 85.27
DP-1 disconnected (normal left inverted right x axis y axis)
DP-2 disconnected (normal left inverted right x axis y axis)
DP-3 disconnected (normal left inverted right x axis y axis)
DP-4 disconnected (normal left inverted right x axis y axis)
HDMI-1-0 disconnected (normal left inverted right x axis y axis)The lightdm log shows the login as when I restarted today the with the mainline kernel, after loading the kernel I was greeted by a black screen. Then I switched to a tty and restarted the lightdm.service
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#9 2025-09-24 13:18:10
- seth
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- Registered: 2012-09-03
- Posts: 68,325
Re: [SOLVED] Unable to log in after update to 6.16.8.arch2-1 via lightdm
Ah, this an intermittent issue/race condition?
https://bbs.archlinux.org/viewtopic.php … 8#p2256418
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#10 2025-09-24 13:31:44
- trardokont
- Member
- Registered: 2019-01-20
- Posts: 9
Re: [SOLVED] Unable to log in after update to 6.16.8.arch2-1 via lightdm
Would appear so. Adding this line
ExecStartPre=/usr/bin/sleep 1to
/usr/lib/systemd/system/lightdm.serviceseems to resolve it. Though I am not sure why this issue arose in the first place. Will mark this as solved. Much obliged for the help.
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