[gentoo-dev] Fwd: Proposal: Declare udev + hotplugd to be the default

[gentoo-dev] Fwd: Proposal: Declare udev + hotplugd to be the default

[Stuart Herbert]

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This discussion belongs on gentoo-dev, not gentoo-core ...

Thanks,
Stu

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Subject: [gentoo-core] Proposal: Declare udev + hotplugd to be the default
Date: Friday 20 August 2004 18:57
From: Benjamin Judas <beejay@gentoo.org>
To: gentoo-core@lists.gentoo.org

Hi folks,

as we all know, devfs is marked as obsolete in current kernels and udev
is supposed to be its successor. For the upcoming releases, the
releng-team plans to make udev the default on livecds and drop devfs.
Our proposal is, what about officially dropping devfs (for those arches
that can handle it, of course) and moving over to udev. This would also
mean, that gentoo-dev-sources has to get gentoo-sources. Again: this is
just a proposal.

What are your opinions on this?

Regards
  Benni
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Benjamin Judas

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RE: [gentoo-dev] Fwd: Proposal: Declare udev + hotplugd to be the default

[Daniel Armyr]

>What are your opinions on this?

Please ensure that there is a proper upgrade guide at the time when
support for devfs is discontinued completely. I assume the upgrade is
non-trivial to do on an existing system.


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RE: [gentoo-dev] Fwd: Proposal: Declare udev + hotplugd to be the default

[Chris Gianelloni]

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On Mon, 2004-08-23 at 09:57, Daniel Armyr wrote:
> >What are your opinions on this?
> 
> Please ensure that there is a proper upgrade guide at the time when
> support for devfs is discontinued completely. I assume the upgrade is
> non-trivial to do on an existing system.

There are no intentions of removing devfs support currently, as it is
required for 2.4 kernels (under Gentoo) since they do not use udev.

As for the "upgrade" it is quite simple.

emerge udev

...and that's really it.  You can test it on a currently-running 2.6
kernel that uses devfs by using devfs=nomount on the kernel command
line.  This will cause your system to boot up using udev.  If you like
udev, you can remove devfs support from your kernel.  There's no kernel
support needed for udev other than hotplug support.

-- 
Chris Gianelloni
Release Engineering - Operations/QA Manager
Games - Developer
Gentoo Linux

Is your power animal a penguin?

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Re: [gentoo-dev] Fwd: Proposal: Declare udev + hotplugd to be the default

[Karl Trygve Kalleberg]

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On Mon, Aug 23, 2004 at 10:13:34AM -0400, Chris Gianelloni wrote:
> On Mon, 2004-08-23 at 09:57, Daniel Armyr wrote:
> > >What are your opinions on this?
> > 
> > Please ensure that there is a proper upgrade guide at the time when
> > support for devfs is discontinued completely. I assume the upgrade is
> > non-trivial to do on an existing system.
> 
> There are no intentions of removing devfs support currently, as it is
> required for 2.4 kernels (under Gentoo) since they do not use udev.
> 
> As for the "upgrade" it is quite simple.
> 
> emerge udev
> 
> ...and that's really it.  You can test it on a currently-running 2.6
> kernel that uses devfs by using devfs=nomount on the kernel command
> line.  This will cause your system to boot up using udev.  If you like
> udev, you can remove devfs support from your kernel.  There's no kernel
> support needed for udev other than hotplug support.

Actually, it's not that simple in all cases, apparently.

I have 2.6.7-gentoo-r1 with the usual plethora of drivers for sound,
framebuffer, DRI, etc, which works pretty well with devfs.

However, after merging udev (as per our Udev Guide), something funky
happens in boot; all console fonts are erased!

I see my trusty cursor blinking away, but all text is either black on black,
or the font tables have been nuked.


Presumably, this is a driver/setup problem that for some reason is not
exhibitied using devfs, probably because I don't load the offending driver.


I should probably sit down and track down which driver is the culprit, but
I've simply not had the time.


Just a word of warning.


-- Karl T

<plug>If you like irish coffee, java or other bean brands, join us now and
share the software at irc.freenode.org/#gentoo-java</plug>

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Re: [gentoo-dev] Fwd: Proposal: Declare udev + hotplugd to be the default

[Greg KH]

There is no program called hotplugd that I know of.

greg k-h

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Re: [gentoo-dev] Fwd: Proposal: Declare udev + hotplugd to be the default

[Greg KH]

On Mon, Aug 23, 2004 at 04:23:53PM +0200, Karl Trygve Kalleberg wrote:
> 
> Actually, it's not that simple in all cases, apparently.

All cases are special :)

> I have 2.6.7-gentoo-r1 with the usual plethora of drivers for sound,
> framebuffer, DRI, etc, which works pretty well with devfs.
> 
> However, after merging udev (as per our Udev Guide), something funky
> happens in boot; all console fonts are erased!

Odds are dri is the issue here.  The DRI people know about this and have
some pending patches to add kernel support so that udev works for it.

If this isn't the problem, please file a bug, if you can figure out
which piece is missing.

thanks,

greg k-h

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