Failed to start SDDM

I recently installed Nvidia graphics drivers in my newly installed KDE Plasma and then after a reboot this error shows up.

Failed to start Simple Desktop Display Manager.

Someone please help! I just got this laptop I don’t wanna break it :frowning:

I did run systemctl status sddm.service on tty and it outputs this log

Manjaro Linux 5.7.17-2-MANJARO (rocktim) (tty2)
rocktim login: rocktim
Last log in: Mon Sep 7 21:54:05 on ttya
systemctl status sddm.service
sddn.service Simple Desktop Display Manager
Loaded : loaded (/usr/lib/systend/system/sddm.service; enabled; vendor preset: disabled)
Active: failed (Result: core-dump) since Mon 2020-09-07 22:07:53 IST: 1min 50s ago
Docs: man sddm(1)
man sddn.conf (5)
Process: 1119 ExecStart=/usr/bin/sddm (code=dumped, signal=ABRT)
Main PID: 1119 (code=dumped, signal=ABRT)
Sep 07 22:07:53 rocktin systemd[1]: sddm.service: Scheduled restart job, restart counter is at
Sep 07 22:07:53 rocktin systemd[1]: Stopped Simple Desktop Display Manager.
Sep 07 22:07:53 rocktim systemd[1]: sddm. service: Start request repeated too quickly.
Sep 07 22:07:53 rockt in systemd[1]: sddm .service: Failed with result 'core-dump'
Sep 07 22:07:53 rockt in systemd[1]: Failed to start Simple Desktop Display Manager.


Read this first and try it

There is no hammer attached to sddm.service if fails … so no worries, but we need more information tho, about your laptop.
This is the kind of information we need:

I did read through that whole thread that you mentioned but no success getting it back to normal.

So here are some basic info about my laptop.
It’s HP Pavillion Gaming Laptop. It runs on AMD Ryzen 5 and uses Nvidia Geforce GTX 1050 graphics .
After the installation of KDE Plasma. I upgraded the hardware graphics drive from video-linux to a hybrid amd and nvidia graphics driver after that I did a reboot and I am welcomed with this. And now I’m freaking out!!

Here’s what inxi -Fazy logs

Type: 11tf status: Not affected
Type: nds status: Not affected
Type: neltdown status: Not affected
Type: spec_store_bypass
nitigation: Speculative Store Bypass disabled via prctl and seccomp
usercopy/swapgs barriers and _user pointer sanitization
disabled. KSB filling
Type: srbds status: Not affected
Type: tsx_async_abort status: Not affected
Device-1: NUIDIA GP107M [GeForce GTX 1050 3 GB Max-Q]
vendor: Hewlett-Packard driver: nvidia v: 450.66
alternate: nouveau,nuidia_drm bus ID: 01:00.0 chip ID: 10de: 1c91
Device-2: AMD Picasso vendor: Hewlett-Packard driver: andgpu u: kernel
bus ID: 05:00.0 chip ID: 1002:15de
Device-3: IMC Networks HP TrueVision HD Camera type: USB driver: uucvideo
bus ID: 3-1:2 chip ID: 1343:56c9 serial: (filter>
Display: server: 1.20.8 driver: nodesetting, nuidia tty: 240x67
Message: Advanced graphics data unavailable in console. Try 6 --display
Device-1: AMD Raven Rauen2 FireFlight Renoir Audio Processor
vendor: Hewlett-Packard driver: N/A alternate: snd_pcl_acp3x bus ID: 05:09.5
chip ID: 1022:15e2
Device-2: AMD Family 17h HD Aud lo vendor: Hewlett-Packard
driver: snd_hda_intel u: kernel bus ID: 5:00.6 chip ID: 1022:1503
Sound Server: ALSA u: k5.7.17-2-MANJARO
Device-1: Realtek RTLEBZZCE BOZ.11ac PCIe Wireless Network Adapter
vendor: Hewlett-Packard driver: rtu_pci v: MA Modules: rtupci port: cobe
bus ID: 03:08.@ chip ID: 10ec.c822
IF: wlol state: down mac: <filter>
Devicc-2: Realtek RTL8111/6168/8411 PCI Express Gigabit Ethernet
vendor: Hewlett-Packard driver: r8169 u: kernel port: 1000 bus ID: 04:00.0
chip ID: 10ec:8168
IF: enol state: down mac: <filter>
Local Storage: total: 1.03 TiB used: 11.95 GIB (1.17)
SMART Message: Unable to run smartctl. Root privileges required.
ID-1: /dev/numeOn1 vendor: Western Digital model: PC SN5ZO SDAPNLW-128G-1006
size: 119.24 GIB block size: physical: 512 B logical: 512 B speed: 15.8 Gb/s
lanes: 2 serial: <filter> reu: 20120006 scheme: MBR
ID-2: /dev/sda vendor: Western Digital model: WD10SPZX-60210 Te
size: 931.51 GiB block size: physical: 1096 B logical: 512 B speed: 6.0 Gb/s
rotation: 5400 rpm serial: <filter> reu: 1404 scheme: GPT
ID-1: rau size: 119.24 GIB size: 116.87 GIB (98.012)
used: 11.95 GiB (10.2%) fs: ext4 deu: dewnuteOn1p1
Alert: No Swap data was found.
System Tenperatures: cpu: 57.0 C Nobo: N/A
Fan Speeds (RPM): N/A
Use of uninitialized value $ua 12 in string cq at rusr/bin/inxi line 6040.
Use of uninitialized walue Sua 12 in split at musr/binimxi line 6045.
Use of uninitialized value Şua 12 in concatenation () or string at /usr/bin/inxi line 6017.
Use of uninitialized value Sua 12 in concatenation (.) or string at /usrbin/inxi line 6019.
Use of uninitialized value Sva 12 in concatenation (.) or string at yusr/bin/inxi line 6050 -
GPU: device: temp: N/A device: amdgpu temp: 57 C
Processes: 173 Uptime: 57m Menory: 5.75 GIB used: 270.9 MiB (4.6%)
Init: systend v: 246 Compilers: gcc: 10.2.0 Packages: pacman: 1203 lib: 320
flatpak: Shell: fish v: 3.1.2 running in: tty 2 inxi: 3.1.05

This is what you need then

So you installed the video-hybrid-amd-nvidia-450xx-prime drivers ?

Yes sir…I did install it

Ok, not sure. Install also the video-modesetting
sudo mhwd -i pci video-modesetting

I can’t see in your inxi, but do you use also some custom kernel boot parameters as described here?

Or maybe will work as described here by another forum member

I did run the command you just said and here is the output:

sudo mhwd -i pci video-nodesetting
Isudo] password for rocktim:
> Installing video modesetting.
Sourcing etcnhud-x86_64.conf
Has link support: true
Sourcing warvlib/
Processing classid: 0300
Sourcing parvlib/nhud scripts include_0900
> Successfully installed uideo-nodesetting

ps : I am using a image to text (OCR)to write this logs here in the forum so there may he some typos here but know that I am typing the right commands in my laptop

You will have to reboot the system now:
systemctl reboot

If is not working, do not panic, the links i provided have also instructions how to remove a driver and try something else.

It didn’t work. So which specific instructions I have to follow now?

sudo mhwd -r pci video-modesetting

ok so I did run that and it removed video-modesetting and now I should run
sudo mhwd -f -i pci video-linux ??
This will install video-linux ? I already have video-hybrid-amd-nvidia-450xx-prime . Should I not remove it first then install video-linux ?

No, it seems you need both and in that particular order, according to the other forum member that got his laptop working that way. SO, because i do not have my hands on such device, i can rely a bit on their experience. :slight_smile:
Also, make sure the system is updated:
sudo pacman-mirrors -f && sudo pacman -Syyu

Once you installed the drivers just reboot. If you are faced again in TTY only, then run:
systemctl stop sddm
systemctl disable sddm
systemctl enable sddm
then again
systemctl reboot

Also Quick question before I proceed on doing these. Doesn’t my laptop need wifi connection for installing these ? I mean can my system even use internet at this state ?

It could be connected in that state, yes. A way to test is if you get errors at update. :slight_smile:
Otherwise just test:

1 Like

Yes. But only sudo pacman-mirrors -f && sudo pacman -Syyu requires interenet connection.

1 Like

Ok I am trying to ping google and its not working also I am checking my mobile hotspot It’s only connected to 1 device which is my old laptop ,which I am using to write here.So my other laptop is definitely not connected to internet. When it was normal it required to put my password in some wallet to connect to wifi so how do I connect here ?

holy moly. I did some research and was able to connect to my wifi with nmcli command

nmcli d wifi list

nmcli d wifi connect <WiFiSSID> password <WiFiPassword> iface <WifiInterface>

Now I am downloading mirrors, will update when it’s done.

1 Like

So I did all of the steps from Installing mirror to upgrading system and adding the drivers.Nothing worked. So what can be done here now ?

We have to see where is failing.
systemctl status sddm
Did it failed the same way as before or something else?
What happens if you run from TTY

Sorry I went to sleep was too late. Man I am so bummed out , I got my new laptop and now I can’t even use it,
anyway this is what systemctl status sddm logs

systemctl status sdam
sddm.service - Simple Desktop Display Manager
Loaded: loaded (/usr/lib/systend/system/sddm.service; enabled; vendor preset: disabled)
Active: failed (Result: core-dump) since Tue 2020-09-08 09:15:03 IST; 1min 3s ago
Docs: man sddm(1)
man sddm.conf (5)
Process: 1113 ExecStart=/usr/bin/sddm (code=dumped, signal=ABRT)
Main PID: 1113 (code=dumped, signa l=ABRT)
Sep 08 09:15:03 rockt im systemd[1]: sddm.service: Scheduled restart job, restart counter is at 5
Sep 08 09:15:03 rocktin systemd[1]: Stopped Simple Desktop Display Manager.
Sep 08 09:15:03 rockt in systemd[1]: sddm.service: Start request repeated too quickly.
Sep 08 09:15:03 rocktim systemd[1]: sddm.service: Failed with result 'core-dump'.
Sep 08 09:15:03 rockt im systemd[1]: Failed to start Simple Desktop Display Manager,

and startplasma-x11 logs this

$DISPLAY is not set or cannot connect to the X server.