Started light display manager

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Linux_ppc2100
Linux_ppc21001156Ă—521 45 KB

Display is not coming.

Previously its working

2

Hi,

from the screenshot I only can conclude that I’m pretty sure it’s a Linux operating system used on the device we’re talking about:
Light Display Manager (or LightDM) is a Linux-based display manager, responsible for the graphical user interface logon. Normally, immediately after starting LightDM the user logon screen should be shown (or, in case of automatic logon, the desktop should be shown).

To get a bit better impression if we can assist here in the community, some more information would be helpful:

  • what hardware is shown on the screenshot, can you please share the order code / type code?
  • Are you the owner / user of this machine, or a machine developer?
  • What was the last action before the issue happened? E.g. “changed some settings”, “installed a new package”, or “power off the system without doing a shutdown first” …
  • If you’re the developer of this system:
    • which Linux is installed on the device, have you installed it by yourself or was it pre-installed?
    • is it a “B&R Linux” based on Debian, and if yes, what version, and are additional / own packages installed or is it just a “out-of-the-box” image?
    • is the system still accessible, e.g. by SSH, or by connecting a keyboard and trying to switch to / boot into a console - if yes, are there any error messages in the system / kernel logfiles?

Best regards!

1 Like
3

  • what hardware is shown on the screenshot, can you please share the order code / type code?----

    5AP1120
    5AP11201156Ă—521 33.7 KB

  • Are you the owner / user of this machine, or a machine developer?
    *Programmer

  • What was the last action before the issue happened? E.g. “changed some settings”, “installed a new package”, or “power off the system without doing a shutdown first” …

After transferring the AS program from another laptop.

  • If you’re the developer of this system:
    • which Linux is installed on the device, have you installed it by yourself or was it pre-installed?

Developer
Linux image installed by me.
Not preinstalled.
For Mappview browser needed for that we installed Linux OS.

  • is it a “B&R Linux” based on Debian, and if yes, what version, and are additional / own packages installed or is it just a “out-of-the-box” image?

Yes its B&R Linux Based on Debian.
ADI driver installed–2.8.0
MTCX driver installed–4.0.1
Hypervisor installed.–1.6.0.4

  • is the system still accessible, e.g. by SSH, or by connecting a keyboard and trying to switch to / boot into a console - if yes, are there any error messages in the system / kernel logfiles?

Didn’t checked.

Once i get above error (mentioned in previous post)
Installed Linux OS
Installed ADI,MTCX & Hypervisor again & now working fine.

but we don’t know why OS crashed.

is there any UPS required for this PPC?
normally operator power off the panel without shutdown the PPC2100 i hope this will create the issue ?

Please help on this regard.

4

Hi,

sure I can’t swear if it was really the root cause, but in principle a unclean shutdown / powerfail can damage the filesystem of Linux (or Windows).
Independent of the GPOS system and hardware used, a UPS can prevent this by triggering a clean shutdown when main power fails.

But if you don’t need to store data while runtime on the Linux filesystem, the’re also possibilities to write-protect the filesystem.
I’m not sure if it’s B&R Linux 10 you’re using? In this version fsprotect is included (for other versions of B&R Linux I’m not sure), please look in the manual of your version used for “File System Write Protection”, for example here’s the link to the B&R Linux 10 documentation (fsprotect info is in chapter 5.1.3, see screenshot below).

image
image741Ă—838 120 KB

Best regards!