#1 2022-05-12 11:32:54

Carver

New Member

Registered: 2022-04-27

Posts: 2

Light DM halting boot on mobile AMD machine

Just acquired a new laptop and am installing BL on it. during the boot sequence Light DM is halting it from continuing. The laptop is fairly new. It is Acer's A515-46-R3UB.

I have installed back ports and updated and upgraded everything. However still get the error.
Much appreciation to those who know a lot more than me who are willing to help. Thanks.

CPU Info: AMD Ryzen 3350U with radeon vega mobile gfx

System BIOS Version: V 1.05
GOP version: AMD GOPx64 Release Driver Rev.2.8.0.0.0.  Jul 26 2019. 11:24:53

HDD0 Model Name:    None
HDD0 Serial Number: None
HDD1 Model Name:    HFM128GD3JX016N
HDD1 Serial Number: FYA4NO26710504A3D
SATA MODE: AHCI

Total Memory:  4096MB

SERIAL NUMBER: NXABRAA007147289DD7600

PRODUCT NAME:  Aspire A15-46
MANUFACTURER:  Acer
UUID:          7D95F2C2-E286-8F4E-9D9F-C018506B58EB

 

 lightdm.service - Light Display Manager
  loaded: loaded(/lib/systemd/system/lightdm/lightdm.service; inderect vendor present:enabled)

Active failed (Result: exit-code) since Wed 2022-05-11 22:08:59 EDT; 3 mins39s ago

DOCS: man:lightdm(1)

Process: 598 ExecStartPre=/bin/sh -c ( "$cat  /etc/X11/default-display-manager 2>/dev/null)= "/usr/sbin/lightdm")  (code=exited, staus=0/success

Process: 600 ExecStart= usr/sbin/lightdm (code=exited, status=1/failure)
Main PID: 600 (code=exited, status=1/failure)

rbh

Moderator

From: South of Lapplands inland

Registered: 2016-08-11

Posts: 1,921

Re: Light DM halting boot on mobile AMD machine

@Carver, did you solve this or is it still a problem?
I see that I forgot to answer in May...

during the boot sequence Light DM is halting it from continuing. The laptop is fairly new. It is Acer's A515-46-R3UB.

It is this computer https://www.acer.com/ac/en/US/content/m … .ABRAA.007.
When searching Internet for "Acer A515-46-R3UB" and linux, I don't get any usefull links.'

I searched the linux-hardware database, there is two Acer A515-* models
https://linux-hardware.org/?view=comput … +%28All%29
but not exactley your modell.

 lightdm.service - Light Display Manager
  loaded: loaded(/lib/systemd/system/lightdm/lightdm.service; inderect vendor present:enabled)
[...]

This, I suppose is output from command "systemctl status lightdm.service".

Then boot is not halted, it boots ok, but it can not start X.
Probabley due to graphic driver problems.

If it was my computer, I would first upgrade to present stable debian (Bullseye, 11).

If error still persistent, investigate logs.
Test boot to BunsenLabs live session (on ) Beryllium test iso https://forums.bunsenlabs.org/viewtopic … 96#p123596.
Test boot failsafe mode.

Investigate logs:
  /var/log/kern.log 
  /var/log/Xorg.0.log

The journal (journalctl) gives a lot of info, might be easier to read it when filtering.
sudo journalct -k -b
    shows kernelinfo since last boot
sudo journalct -p 3 -b
    shows info with priority 3 (errors)

You can also install package hw-probe (from debian 11), run a probe and save it online or on disk.
You can run lspci with flaggs -nn, to show vendor ID:device ID of your grapic card, and look up the device at the linux-hardware database.
Or run hw-probe from debian live iso (It got omited from the BL beryllium beta iso).

---

// Regards rbh

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