Re: [CentOS] Centos 7, systemd, and nvidia drivers

[mark]

On 09/16/15 19:50, Jonathan Billings wrote:

On Sep 16, 2015, at 5:21 PM, m.r...@5-cent.us wrote:

I tried systemctl start multi-user.target. I tried systemctl stop
graphical.target. I finally had to set the multi-user.target as the
default, and reboot, to get rid of the nouveau drivers.

Note that I tried to modprobe -r, and rmmod with all the modules using
nouveau, and couldn't - I kept getting "in use" - it seemed like a
circular reference.

As I said, I rebooted. Then I ran the proprietary build, ran fine. I try
starting the graphical target, no joy. I changed the default target back
to graphical, and rebooted. Still no xorg. Googling (yahooing?), I added
rdblacklist=nouveau in grub.conf, *then* had to rebuild the grub2 (grub2
must *die*).

Still wouldn't see the nvidia drivers on reboot. Finally, I rebuild the
initramfs, which got the now-built and installed nvidia drivers (and I'd
yum uninstalled nouveau), and finally, it came up.

Oh, and for some reason, without the reboot, the Xorg.0.log wasn't
renewed, as though it hadn't actually restarted X. Plus, it appears that
 is disabled




Of course, none of this had anything to do with systemd, other than the
commands you had to change runlevels.  It’d be the same problem with
Upstart in CentOS6, just different commands.  The kernel modesetting stuff
is at fault here.  But who needs facts to get in the way of a good rant?


Really? In Centos 6, if I do an init 3, it shuts down X; none of the above did 
that,


I suggest looking at http://elrepo.org/tiki/kmod-nvidia


I'm familiar with elrepo.

mark
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Re: [CentOS] Centos 7, systemd, and nvidia drivers

[John Hodrien]

On Thu, 17 Sep 2015, mark wrote:


I'm familiar with elrepo.


Then why didn't you use them for the nvidia driver?

jh
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Re: [CentOS] Centos 7, systemd, and nvidia drivers

[Gordon Messmer]

On 09/17/2015 03:53 AM, mark wrote:
Really? In Centos 6, if I do an init 3, it shuts down X; none of the 
above did that, 


You ran "systemctl start multi-user" when you meant to "systemctl 
isolate multi-user".


The man page describes isolate: "This is similar to changing the 
runlevel in a traditional init system."


Aside from the fact that you use the same command, systemctl, to "start" 
a service and "isolate" a runlevel, none of the problems you described 
had anything to do with systemd.


In fact, even switching runlevels/targets is unrelated to the video 
modules.  You always have to blacklist the video driver, or boot with 
"nomodeset" to remove the video card's kernel module (Actually, you 
might be able to "echo :" > /sys/bus/pci/devices/:ID>/driver/unbind" sometimes. Some drivers might cause a kernel panic, 
though.) because even in multi-user mode with no X.org, the kernel is 
still using the module for its console.

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Re: [CentOS] Centos 7, systemd, and nvidia drivers

[m . roth]

Matthew Miller wrote:
> On Thu, Sep 17, 2015 at 08:52:57AM -0700, Gordon Messmer wrote:
>> You ran "systemctl start multi-user" when you meant to "systemctl
>> isolate multi-user".
>> The man page describes isolate: "This is similar to changing the
>> runlevel in a traditional init system."
>
> Note that you can actually do 'telinit 3' and telinit 5' with systemd.
> I do, even though the documentation is a little complainy about it.
> This maps to `systemctl isolate runlevel3.target` or `systemctl isolate
> runlevel2.target` (which in turn are symlinks to multi-user.target and
> graphical.target), and is a lot less typing. :)

Ok, and thanks. I want to keep this info.

  mark

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Re: [CentOS] Centos 7, systemd, and nvidia drivers

[Matthew Miller]

On Thu, Sep 17, 2015 at 08:52:57AM -0700, Gordon Messmer wrote:
> You ran "systemctl start multi-user" when you meant to "systemctl
> isolate multi-user".
> The man page describes isolate: "This is similar to changing the
> runlevel in a traditional init system."

Note that you can actually do 'telinit 3' and telinit 5' with systemd.
I do, even though the documentation is a little complainy about it.
This maps to `systemctl isolate runlevel3.target` or `systemctl isolate
runlevel2.target` (which in turn are symlinks to multi-user.target and
graphical.target), and is a lot less typing. :)


-- 
Matthew Miller

Fedora Project Leader
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Re: [CentOS] Centos 7, systemd, and nvidia drivers

[Jonathan Billings]

On Sep 16, 2015, at 5:21 PM, m.r...@5-cent.us wrote:
> I tried systemctl start multi-user.target. I tried systemctl stop
> graphical.target. I finally had to set the multi-user.target as the
> default, and reboot, to get rid of the nouveau drivers.
> 
> Note that I tried to modprobe -r, and rmmod with all the modules using
> nouveau, and couldn't - I kept getting "in use" - it seemed like a
> circular reference.
> 
> As I said, I rebooted. Then I ran the proprietary build, ran fine. I try
> starting the graphical target, no joy. I changed the default target back
> to graphical, and rebooted. Still no xorg. Googling (yahooing?), I added
> rdblacklist=nouveau in grub.conf, *then* had to rebuild the grub2 (grub2
> must *die*).
> 
> Still wouldn't see the nvidia drivers on reboot. Finally, I rebuild the
> initramfs, which got the now-built and installed nvidia drivers (and I'd
> yum uninstalled nouveau), and finally, it came up.
> 
> Oh, and for some reason, without the reboot, the Xorg.0.log wasn't
> renewed, as though it hadn't actually restarted X. Plus, it appears that
>  is disabled
> 
> Then all I had to do was fight and hand-edit the xorg.conf, which *MUST*
> be in /etc/X11/sorg.conf.d to be even seen But what I had to do is
> beyond this - my user's got three monitors, on two cards, and two are for
> 3D, and so nothing to do with my issues with trying to get systemd to load
> and xorg to use the nvidia drivers.

Of course, none of this had anything to do with systemd, other than the 
commands you had to change runlevels.  It’d be the same problem with Upstart in 
CentOS6, just different commands.  The kernel modesetting stuff is at fault 
here.  But who needs facts to get in the way of a good rant?

I suggest looking at http://elrepo.org/tiki/kmod-nvidia

The nvidia RPMs at elrepo sets up the kernel arguments and the xorg.conf.d 
files.  Pretty simple.

--
Jonathan Billings 


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