[SOLVED]Deb12Cinnamon: why starting so slow?

[debcub]

Hi,
my system is a HP Laptop 15s-eq1445ng with 500GB SSD drive and multiboot Debian 12 Gnome, Debian 12 Cinnamon, EndeavourOS rolling and Windows 11. Booting with Grub and Deb12Cinnamon being the main system (default in grub). All distros work well, except:

Debian 12 Cinnamon takes about 45 seconds for the login-screen to appear, while all the other distros take only about 7 secons.

I am no expert with this, just found one error line in dmesg:

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[    1.791439] ACPI Error: AE_NOT_FOUND, While resolving a named reference package element - \_PR_.P000 (20220331/dspkginit-438)

and towards the bottom of dmesg a lot of lines with "?", such as:

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   44.109221]  ? __warn+0x7d/0xc0

Should I be worried with Debian Cinnamon's "slowness"?

Editied: 23 Aug 2023

[debcub]

Sorry, it should read "Deb12Cinnamon: why starting so slow?". And it is Deb12Cinnamon that can take even longer, about 45 seconds, before I can login into my account. Deb12Gnome, EndeavourOS and Windows 11 take about 7 to 14 seconds.

If this longer time with DebCinnamon is ok, it is fine with me. I just would not like that it is a prelude to something worse to come.

[sunrat]

Sorry, it should read "Deb12Cinnamon: why starting so slow?".

Edit your first post and change the title please.

[debcub]

I found something which worries me, too:

The slow Deb12Cinnamon:

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$ ls -l /usr/share/xsessions/
total 28
-rw-r--r-- 1 root root  268 Mar 19 22:38 cinnamon2d.desktop
-rw-r--r-- 1 root root  155 Mar 19 22:38 cinnamon.desktop
-rw-r--r-- 1 root root 8110 Nov 22  2022 gnome-classic.desktop
-rw-r--r-- 1 root root 7575 Nov 22  2022 gnome-classic-xorg.desktop
-rw-r--r-- 1 root root   86 Jan 11  2022 lightdm-xsession.desktop
$

The fast Deb12Gnome:

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$ ls -l /usr/share/xsessions/
total 32
-rw-r--r-- 1 root root 8110 Nov 22  2022 gnome-classic.desktop
-rw-r--r-- 1 root root 7575 Nov 22  2022 gnome-classic-xorg.desktop
-rw-r--r-- 1 root root 7777 Oct 11  2022 gnome.desktop
-rw-r--r-- 1 root root 7877 Oct 11  2022 gnome-xorg.desktop
$

Could those additional "alien" desktop environments in Cinnamon be the culprits?

[debcub]

In a different forum I found the solution to speed up my slow kernel which was the culprit:

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$ sudo apt install firmware-misc-nonfree

[debcub]

Just for the record:
This link
https://www.reddit.com/r/debian/comment ... mely_slow/
contained the above mentioned fix. It sped "up" my kernel from about 45s to about 5s, as indicated by

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$ systemd-analyze