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Bug 815093 - boot warning >> udevd[493] specified group 'plugdev' unknown
boot warning >> udevd[493] specified group 'plugdev' unknown
Product: Fedora
Classification: Fedora
Component: libftdi (Show other bugs)
x86_64 Linux
unspecified Severity low
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Assigned To: Lucian Langa
Fedora Extras Quality Assurance
Depends On:
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Reported: 2012-04-22 09:01 EDT by Simon Lewis
Modified: 2013-02-13 08:19 EST (History)
13 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
: 835636 (view as bug list)
Last Closed: 2013-02-13 08:19:25 EST
Type: Bug
Regression: ---
Mount Type: ---
Documentation: ---
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Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:

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Description Simon Lewis 2012-04-22 09:01:16 EDT
The warning "udevd[493] specified group 'plugdev' unknown" is always shown on boot, the number varies each time, I guess that's to do with sequence systemd runs.

The boot sequence is not stopped and the installation runs correctly, except that the alsa interfaces sometimes show up late.

I can't find "plugdev" using a text search recursively in /etc - so I don't know where it's coming from.

Any ideas?
Comment 1 Harald Hoyer 2012-04-23 06:31:49 EDT
$ fgrep -r plugdev /{etc,lib}/udev/rules.d
/etc/udev/rules.d/99-libftdi.rules:SUBSYSTEM=="usb", ATTRS{idVendor}=="0403", ATTRS{idProduct}=="6010", MODE="0664", GROUP="plugdev"

$ rpm -qf /etc/udev/rules.d/99-libftdi.rules
Comment 2 Kay Sievers 2012-04-23 07:16:42 EDT
The group "plugdev" is a pretty misguided and inflexible Ubuntu concept to grant
device access to ordinary users.

Fedora supports dynamic uder ACLs, and does not want to support any static
groups for users.

The rule needs to be fixed, the group "plugdev" should not exist on Fedora.
Comment 3 Jóhann B. Guðmundsson 2012-09-21 09:19:20 EDT
From the looks of it this one has not been fixed but rather "worked around"

getent group plugdev >/dev/null || groupadd -r plugdev
exit 0"

Kay can you give a bit more detail ( sample ) on what is the proper way to fix this since we are seeing this in more packages then just this one
Comment 4 Kay Sievers 2012-09-23 07:20:08 EDT
(In reply to comment #3)
> From the looks of it this one has not been fixed but rather "worked around" 
> "%pre
> getent group plugdev >/dev/null || groupadd -r plugdev
> exit 0"
> Kay can you give a bit more detail ( sample ) on what is the proper way to
> fix this since we are seeing this in more packages then just this one

Sure, we must entirely get rid of that crap. "plugdev" is a very misguided
and fundamentally wrong Ubuntuism. Fedora must not solve problems that way,
we do not put users in system groups to grant access to devices, especially
do not define non-sensical groups like: "the group of users that can plug
devices into the system".

Fedora uses individually managed ACLs for granting ordinary user access
to devices. The ACLs are seat (multiple users working simultaneously on
the same host), and they track session activity. It depends on the type
of devices how to hook up the device in the ACL handling:

Please just patch the rules not to use "plugdev" at all, we can do better and
don't want "plugdev" in Fedora. Thanks!
Comment 5 Paulo Fidalgo 2012-10-16 06:11:10 EDT
Argyll relies on plugdev group too:

fgrep -r plugdev /{etc,lib}/udev/rules.d
/lib/udev/rules.d/55-Argyll.rules:# Otherwise, restrict access to members of the plugdev group
/lib/udev/rules.d/55-Argyll.rules:ENV{COLOR_MEASUREMENT_DEVICE}=="*?", ENV{ACL_MANAGE}!="*?", MODE="660", GROUP="plugdev"
Comment 6 Paulo Fidalgo 2012-10-16 06:13:44 EDT
Forget my last comment... it's unrelated with libftdi.
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Comment 8 Fedora End Of Life 2013-02-13 08:19:36 EST
Fedora 16 changed to end-of-life (EOL) status on 2013-02-12. Fedora 16 is 
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