Arch Linux

Gullible Jones

Member

Registered: 2004-12-29

Posts: 4,863

How to blacklist modules that are compiled into the kernel?

Suppose my kernel has a driver compiled into it that is causing problems, and I want to disable it. How would I do that? What would I append to the kernel line in GRUB to prevent a specific driver from loading, when it is *not* compiled as a module?

Gullible Jones

Member

Registered: 2004-12-29

Posts: 4,863

Re: How to blacklist modules that are compiled into the kernel?

Okay, I have discovered the hwprobe boot option, which is apparently supposed to do as I've described (if used as "hwprobe=-foo"). Problem is, it doesn't do anything at all, as far as I can tell, at least when used with LILO. What am I doing wrong here?

Last edited by Gullible Jones (2008-07-29 05:51:16)

Square

Member

Registered: 2008-06-11

Posts: 435

Re: How to blacklist modules that are compiled into the kernel?

Isn't that done through /etc/modprobe.conf by adding a line?

Such as:

blacklist snd_ac97_codec

or prefixing them with a ! as written here http://www.archlinux.it/wiki/index.php?title=Rc.conf

Last edited by Square (2008-07-29 06:41:56)

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kishd

Member

Registered: 2006-06-14

Posts: 401

Re: How to blacklist modules that are compiled into the kernel?

I think the best way would be to add the kernel boot parameter disablemodules=module1,module2,etc when booting.

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Gullible Jones

Member

Registered: 2004-12-29

Posts: 4,863

Re: How to blacklist modules that are compiled into the kernel?

Isn't that done through /etc/modprobe.conf by adding a line?

Such as:

blacklist snd_ac97_codec

or prefixing them with a ! as written here http://www.archlinux.it/wiki/index.php?title=Rc.conf

No, this is for drivers compiled into the kernel, such as the IDE and PATA subsystems (on distros other than Arch).

I think the best way would be to add the kernel boot parameter disablemodules=module1,module2,etc when booting.

Thanks, I'll try that...

toofishes

Developer

From: Chicago, IL

Registered: 2006-06-06

Posts: 602

Website

Re: How to blacklist modules that are compiled into the kernel?

Suppose my kernel has a driver compiled into it that is causing problems, and I want to disable it. How would I do that? What would I append to the kernel line in GRUB to prevent a specific driver from loading, when it is *not* compiled as a module?

Perhaps you should call the thread "How to blacklist drivers that are compiled into the kernel", since you have gotten like 6 incorrect responses due to your misnaming?

phrakture

Arch Overlord

From: behind you

Registered: 2003-10-29

Posts: 7,879

Website

Re: How to blacklist modules that are compiled into the kernel?

There was a way to do this, and I thought it had to do with sysfs or sysctl or something. When we had ip6 compiled in to the kernel, people used to disable it all the time.

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Gullible Jones

Member

Registered: 2004-12-29

Posts: 4,863

Re: How to blacklist modules that are compiled into the kernel?

I think the best way would be to add the kernel boot parameter disablemodules=module1,module2,etc when booting.

Thanks, I'll try that...

Nope this doesn't work either. Bah.

Edit: okay I found the sysctl.conf method (here) but it looks a little difficult to apply to an arbitrary driver. Anyone know how I would do that?

Last edited by Gullible Jones (2008-07-29 18:42:41)

dyscoria

Member

Registered: 2008-01-10

Posts: 1,007

Re: How to blacklist modules that are compiled into the kernel?

Going with what phrak said, maybe this will help:
http://linuxshellaccount.blogspot.com/2 … ables.html

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broch

Banned

From: L.A. California

Registered: 2006-11-13

Posts: 975

Re: How to blacklist modules that are compiled into the kernel?

1) this is incorrect (taken from IPv6 example)

How can I enable forwarding between IPv6 enabled interfaces?

In /etc/sysctl.conf add the line

net/ipv6/conf/all/forwarding=1

it should be:
net.ipv6.conf.all.forwarding=1

2) not sure if system calls will help
to check if you can manipulate something with sysctl, first run

sysctl -a | grep your_module_name

if your stuff is not listed, then obviously sysctl will not help

Last edited by broch (2008-07-30 02:28:24)