GDM to SDDM/LightDM - OS boots to a black screen

R41D3N · 2018-04-11 04:48:06

System specs:
Nvidia 840m 4GB GPU,
CPU- Intel® Core™ i7-4510U CPU @ 2.00GHz × 4 ,

What I wanted to do is change GDM greeter to SDDM or LightDM.
Installed both the DMs .

-> Commands:

sudo systemctl disable gdm.service
sudo systemctl enable sddm.service

Note: I have already tried increasing the timer to 20 secs and doing

 systemctl enable sddm.timer

but no results.
The same happens with LightDM too.

I can use tty but can't boot into GUI mode. Only shows black screen.

jasonwryan · 2018-04-11 05:01:23

What's in journal?

Moving to NC...

R41D3N · 2018-04-16 15:05:34

Output of journalctl :

      Apr 07 01:31:23 archlinux kernel: [Firmware Bug]: TSC_DEADLINE disabled due to Errata; please update microcode to version: 0x20 (or la>
      Apr 07 01:31:23 archlinux kernel: ACPI Exception: Could not find/resolve named package element: NVP3 (20170831/dspkginit-381)
      Apr 07 01:31:23 archlinux kernel: ACPI Exception: Could not find/resolve named package element: NVP2 (20170831/dspkginit-381)
      Apr 07 01:31:23 archlinux kernel: ACPI Exception: Could not find/resolve named package element: NVP3 (20170831/dspkginit-381)
      Apr 07 01:31:23 archlinux systemd-fstab-generator[214]: Failed to create unit file /run/systemd/generator/-.mount, as it already exists
      Apr 07 01:31:23 archlinux systemd-fstab-generator[214]: Failed to create unit file /run/systemd/generator/home.mount, as it already exists
      Apr 07 01:31:23 archlinux systemd-fstab-generator[214]: Failed to create unit file /run/systemd/generator/-.mount, as it already exists
      Apr 07 01:31:23 archlinux systemd-fstab-generator[214]: Failed to create unit file /run/systemd/generator/home.mount, as it already exists
      Apr 07 01:31:26 archlinux kernel: intel-spi intel-spi: unrecognized JEDEC id bytes: 1c, 70, 17
      Apr 07 01:31:26 archlinux kernel: nouveau 0000:03:00.0: bus: MMIO read of 00000000 FAULT at 612004 [ IBUS ]
      Apr 07 01:31:26 archlinux kernel: nouveau 0000:03:00.0: bus: MMIO read of 00000000 FAULT at 10ac08 [ IBUS ]

loqs · 2018-04-16 15:15:23

Where did sddm.timer come from?
What journal command did you use to generate that output, filtering output like that removes context and included no entries for sddm or lightdm.
Please post the journal output for sddm and lightdm and the logs for lightdm from /var/log/lightdm

Arch Linux

#1 2018-04-11 04:48:06

GDM to SDDM/LightDM - OS boots to a black screen

#2 2018-04-11 05:01:23

Re: GDM to SDDM/LightDM - OS boots to a black screen

#3 2018-04-16 15:05:34

Re: GDM to SDDM/LightDM - OS boots to a black screen

#4 2018-04-16 15:15:23

Re: GDM to SDDM/LightDM - OS boots to a black screen

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