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From: vallor <vallor@cultnix.org>
Newsgroups: comp.os.linux.advocacy
Subject: Re: Using telinit {1,3,5} with systemd
Date: Sat, 25 May 2024 20:39:22 -0000 (UTC)
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On Sat, 25 May 2024 07:35:12 -0400, Andrzej Matuch <andrzej@matu.ch> wrote
in <v2sidg$2rbb0$12@dont-email.me>:

> On 2024-05-24 8:38 p.m., vallor wrote:
>> On Fri, 24 May 2024 07:47:54 -0400, Andrzej Matuch <andrzej@matu.ch> wrote
>> in <v2pupa$2ae8o$1@dont-email.me>:
>> 
>>> On 2024-05-23 9:15 p.m., vallor wrote:
>>>> So after building a kernel and booting it, I've found it easiest to
>>>> take the system to single-user mode with
>>>>
>>>> $ telinit 1
>>>>
>>>>    ...which will take the system to single-user ("rescue") mode and
>>>> ask for your root password before proceeding.  (Make sure you have one
>>>> set.)
>>>>
>>>> Then I build the open Nvidia drivers, install them,
>>>> then remove the existing Nvidia drivers with the following command
>>>> (that I've scripted):
>>>>
>>>> rmmod nvidia_drm nvidia_modeset nvidia_uvm nvidia
>>>>
>>>>    ...which removes the modules in the proper order,
>>>> accounting for dependencies.
>>>>
>>>> Finally, everything is ready to go, so:
>>>>
>>>> # telinit 5
>>>>
>>>>    ...and the system comes up in all its graphical glory.
>>>>
>>>> I do it this way rather than rebooting because sometimes,
>>>> the drivers don't load right when I boot, and windows tear when they
>>>> move.  If that happens, I do the "telinit 1"-"rmmod"-"telinit 5"
>>>> dance, which has always solved the problem.
>>>>
>>>> (I was pleasantly surprised to find out that systemd knows about init
>>>> runlevels.  Very helpful.)
>>>>
>>>> Finally, if you want to shutdown the display manager and just use vty's
>>>> with getty logins, you could
>>>>
>>>> $ telinit 3
>>>>
>>>> These runlevels are the same as they were with SysV init on Linux.
>>>
>>> I'm curious: are you removing the NVIDIA proprietary drivers here or the
>>> open ones? I'm reading that there are issues with the open-kernel ones
>>> because they're in alpha. I was under the impression that you didn't
>>> have too much trouble with them.
>> 
>> They are the open ones from Nvidia. (Not nouveau, but the "open" version
>> of their proprietary drivers.)
>> 
>> https://github.com/NVIDIA/open-gpu-kernel-modules
> 
> Why are you removing them? Were they problematic?

Hello:
>>> I do it this way rather than rebooting because sometimes,
>>> the drivers don't load right when I boot, and windows tear when they
>>> move.  If that happens, I do the "telinit 1"-"rmmod"-"telinit 5"
>>> dance, which has always solved the problem.

I can't explain why removing the drivers and putting them back
fixes it -- just know it works (thank goodness).

I've reported the problem to Nvidia, haven't anything from them.

-- 
-v