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computers / comp.os.linux.misc / xdm not starting on boot

xdm not starting on boot

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From: lkh@sdf-eu.org (Laurens Kils-Huetten)
Newsgroups: comp.os.linux.misc
Subject: xdm not starting on boot
Date: Mon, 19 Jun 2023 18:48:46 -0000 (UTC)
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by: Laurens Kils-Huetten - Mon, 19 Jun 2023 18:48 UTC

Hi all,

so I'm having this problem on an Arch Linux Laptop: xdm
fails to start when triggered by systemd during the boot
process.

However when I log in as root on tty1 I can start xdm
just fine. startx works as expected, and I can also start
xdm using "systemctl start xdm.service" manually

Xorg.0.log from the failed attempt looks like this:
https://ttm.sh/Bp5.txt

When started after login, and xdm starts properly
Xorg.0.log looks like this:
https://ttm.sh/BpG.txt

Any ideas?

lkh

Re: xdm not starting on boot

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From: robin_listas@es.invalid (Carlos E.R.)
Newsgroups: comp.os.linux.misc
Subject: Re: xdm not starting on boot
Date: Mon, 19 Jun 2023 21:01:33 +0200
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by: Carlos E.R. - Mon, 19 Jun 2023 19:01 UTC

On 2023-06-19 20:48, Laurens Kils-Huetten wrote:
> Hi all,
>
> so I'm having this problem on an Arch Linux Laptop: xdm
> fails to start when triggered by systemd during the boot
> process.
>
> However when I log in as root on tty1 I can start xdm
> just fine. startx works as expected, and I can also start
> xdm using "systemctl start xdm.service" manually
>
> Xorg.0.log from the failed attempt looks like this:
> https://ttm.sh/Bp5.txt

Did you notice the (EE) lines?

--
Cheers, Carlos.

Re: xdm not starting on boot

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From: lkh@sdf-eu.org (Laurens Kils-Huetten)
Newsgroups: comp.os.linux.misc
Subject: Re: xdm not starting on boot
Date: Mon, 19 Jun 2023 19:27:07 -0000 (UTC)
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by: Laurens Kils-Huetten - Mon, 19 Jun 2023 19:27 UTC

Carlos E.R. <robin_listas@es.invalid> wrote:
>>
>> Xorg.0.log from the failed attempt looks like this:
>> https://ttm.sh/Bp5.txt
>
> Did you notice the (EE) lines?
>

Yes, I did. My question is, what causes those errors?

Because as I wrote, when started manually after boot has completed
X starts without errors.

cheers,

lkh

Re: xdm not starting on boot

<u6qdh7$25gen$1@dont-email.me>

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From: jerry@example.invalid (Jerry Peters)
Newsgroups: comp.os.linux.misc
Subject: Re: xdm not starting on boot
Date: Mon, 19 Jun 2023 20:24:07 -0000 (UTC)
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by: Jerry Peters - Mon, 19 Jun 2023 20:24 UTC

Laurens Kils-Huetten <lkh@sdf-eu.org> wrote:
> Hi all,
>
> so I'm having this problem on an Arch Linux Laptop: xdm
> fails to start when triggered by systemd during the boot
> process.
>
> However when I log in as root on tty1 I can start xdm
> just fine. startx works as expected, and I can also start
> xdm using "systemctl start xdm.service" manually
>
> Xorg.0.log from the failed attempt looks like this:
> https://ttm.sh/Bp5.txt
>
> When started after login, and xdm starts properly
> Xorg.0.log looks like this:
> https://ttm.sh/BpG.txt
>
> Any ideas?
>
> lkh

Did you look at the xdm log? /var/log/xdm.log

Re: xdm not starting on boot

<20230619153823.56da0ee8@mx>

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From: johnny@invalid.net (Johnny)
Newsgroups: comp.os.linux.misc
Subject: Re: xdm not starting on boot
Date: Mon, 19 Jun 2023 15:38:23 -0500
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by: Johnny - Mon, 19 Jun 2023 20:38 UTC

On Mon, 19 Jun 2023 18:48:46 -0000 (UTC)
Laurens Kils-Huetten <lkh@sdf-eu.org> wrote:

> Hi all,
>
> so I'm having this problem on an Arch Linux Laptop: xdm
> fails to start when triggered by systemd during the boot
> process.
>
> However when I log in as root on tty1 I can start xdm
> just fine. startx works as expected, and I can also start
> xdm using "systemctl start xdm.service" manually
>
> Xorg.0.log from the failed attempt looks like this:
> https://ttm.sh/Bp5.txt
>
> When started after login, and xdm starts properly
> Xorg.0.log looks like this:
> https://ttm.sh/BpG.txt
>
> Any ideas?
>
> lkh

I had that problem when I first started using MX Linux. The problem
was the Intel video driver wasn't being used. Once enabled the problem
went away.

Re: xdm not starting on boot

<op.16s0q1rga3w0dxdave@hodgins.homeip.net>

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From: dwhodgins@nomail.afraid.org (David W. Hodgins)
Newsgroups: comp.os.linux.misc
Subject: Re: xdm not starting on boot
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by: David W. Hodgins - Mon, 19 Jun 2023 21:02 UTC

On Mon, 19 Jun 2023 15:27:07 -0400, Laurens Kils-Huetten <lkh@sdf-eu.org> wrote:

> Carlos E.R. <robin_listas@es.invalid> wrote:
>>>
>>> Xorg.0.log from the failed attempt looks like this:
>>> https://ttm.sh/Bp5.txt
>>
>> Did you notice the (EE) lines?
>>
>
> Yes, I did. My question is, what causes those errors?
>
> Because as I wrote, when started manually after boot has completed
> X starts without errors.

For some reason the DRM, which creates /dev/dri/card0 when the video module
(amdgpu in this case) gets loaded is taking too long initializing the video card.
https://en.wikipedia.org/wiki/Direct_Rendering_Manager

See https://wiki.archlinux.org/title/AMDGPU

I'm not using arch linux and am not aware of anyone with this problem before,
so that's about all the help I can give.

Regards, Dave Hodgins

Re: xdm not starting on boot

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From: lkh@sdf-eu.org (Laurens Kils-Huetten)
Newsgroups: comp.os.linux.misc
Subject: Re: xdm not starting on boot
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by: Laurens Kils-Huetten - Mon, 19 Jun 2023 21:56 UTC

David W. Hodgins <dwhodgins@nomail.afraid.org> wrote:
> On Mon, 19 Jun 2023 15:27:07 -0400, Laurens Kils-Huetten <lkh@sdf-eu.org> wrote:
>
>> Carlos E.R. <robin_listas@es.invalid> wrote:
>>>>
>>>> Xorg.0.log from the failed attempt looks like this:
>>>> https://ttm.sh/Bp5.txt
>>>
>>> Did you notice the (EE) lines?
>>>
> [...]
>
> For some reason the DRM, which creates /dev/dri/card0 when the video module
> (amdgpu in this case) gets loaded is taking too long initializing the video card.

That's the best explanation i've got so far. Thanks a lot!

On the #archlinux irc I got the suggestion to set up early kms to get the video card
up and running in time.

I wonder if I could delay starting xdm just for some seconds. Only I don't know how
to do that with systemd.

> https://en.wikipedia.org/wiki/Direct_Rendering_Manager
>
> See https://wiki.archlinux.org/title/AMDGPU

Thanks, I'll check out those links.

cheers,

Laurens

Re: xdm not starting on boot

<op.16s5eyfya3w0dxdave@hodgins.homeip.net>

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From: dwhodgins@nomail.afraid.org (David W. Hodgins)
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by: David W. Hodgins - Mon, 19 Jun 2023 22:43 UTC

On Mon, 19 Jun 2023 17:56:27 -0400, Laurens Kils-Huetten <lkh@sdf-eu.org> wrote:
> I wonder if I could delay starting xdm just for some seconds. Only I don't know how
> to do that with systemd.
>
>> https://en.wikipedia.org/wiki/Direct_Rendering_Manager
>>
>> See https://wiki.archlinux.org/title/AMDGPU
>
> Thanks, I'll check out those links.

There's probably a better way, but one simple way to to copy the service
# cp /lib/systemd/system/xdm.service /etc/systemd/system/
(you may need to create the directory /etc/systemd/system first).
Edit /etc/systemd/system/xdm.service ...
Change the line ...
ExecStart=/usr/bin/xdm -nodaemon
to have ...
ExecStart="/usr/bin/sleep 1 && /usr/bin/xdm -nodaemon"

Then run "systemctl daemon-reload".

Increase the 1 to a larger number if that's still not enough.

Regards, Dave Hodgins

Re: xdm not starting on boot

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From: robin_listas@es.invalid (Carlos E.R.)
Newsgroups: comp.os.linux.misc
Subject: Re: xdm not starting on boot
Date: Tue, 20 Jun 2023 11:22:19 +0200
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by: Carlos E.R. - Tue, 20 Jun 2023 09:22 UTC

On 2023-06-20 00:43, David W. Hodgins wrote:
> On Mon, 19 Jun 2023 17:56:27 -0400, Laurens Kils-Huetten
> <lkh@sdf-eu.org> wrote:
>> I wonder if I could delay starting xdm just for some seconds. Only I
>> don't know how
>> to do that with systemd.
>>
>>> https://en.wikipedia.org/wiki/Direct_Rendering_Manager
>>>
>>> See https://wiki.archlinux.org/title/AMDGPU
>>
>> Thanks, I'll check out those links.
>
> There's probably a better way, but one simple way to to copy the service
> # cp /lib/systemd/system/xdm.service /etc/systemd/system/
> (you may need to create the directory /etc/systemd/system first).
> Edit /etc/systemd/system/xdm.service ...
> Change the line ...
> ExecStart=/usr/bin/xdm -nodaemon
> to have ...
> ExecStart="/usr/bin/sleep 1 && /usr/bin/xdm -nodaemon"

Huh, no. DO NOT copy the service file.

Instead, use an override.

systemctl edit xdm.service

Then:

# Wait 30 seconds before the unit starts.
ExecStartPre=/bin/sleep 30

But this is a hack, the proper way is to find what service should start
before and add the dependency. It is a bug in your distribution.

Here is a description on how to delay a service at boot only:

https://sleeplessbeastie.eu/2022/04/04/how-to-delay-the-start-of-the-systemd-service/

--
Cheers, Carlos.

Subject	Author
xdm not starting on boot	Laurens Kils-Huetten
Re: xdm not starting on boot	Carlos E.R.
Re: xdm not starting on boot	Laurens Kils-Huetten
Re: xdm not starting on boot	David W. Hodgins
Re: xdm not starting on boot	Laurens Kils-Huetten
Re: xdm not starting on boot	David W. Hodgins
Re: xdm not starting on boot	Carlos E.R.
Re: xdm not starting on boot	Jerry Peters
Re: xdm not starting on boot	Johnny