Try this (my "fix" is in /lib/udev/rules.d/40-gentoo.rules):
moriah ~ # equery f udev
* Searching for udev ...
* Contents of sys-fs/udev-171-r6:
/etc
/etc/conf.d
/etc/conf.d/udev
/etc/init.d
...
/lib/udev/rules.d
/lib/udev/rules.d/30-kernel-compat.rules
/lib/udev/rules.d/40-gentoo.rules
/lib/udev/rules.d/42-qemu-usb.rules
/lib/udev/rules.d/50-firmware.rules
/lib/udev/rules.d/50-udev-default.rules
/lib/udev/rules.d/60-cdrom_id.rules
/lib/udev/rules.d/60-floppy.rules
/lib/udev/rules.d/60-persistent-alsa.rules
/lib/udev/rules.d/60-persistent-input.rules
...
moriah ~ # grep snd /lib/udev/rules.d/*
/lib/udev/rules.d/40-gentoo.rules:SUBSYSTEM=="snd", GROUP="audio"
/lib/udev/rules.d/50-udev-default.rules:KERNEL=="seq",
GROUP="audio", MODE="0660", OPTIONS+="static_node=snd/seq"
/lib/udev/rules.d/50-udev-default.rules:KERNEL=="timer",
GROUP="audio", MODE="0660", OPTIONS+="static_node=snd/timer"
/lib/udev/rules.d/60-persistent-alsa.rules:ENV{ID_SERIAL}=="?*",
ENV{ID_IFACE}=="?*",
SYMLINK+="snd/by-id/$env{ID_BUS}-$env{ID_SERIAL}-$env{ID_IFACE}"
/lib/udev/rules.d/60-persistent-alsa.rules:ENV{ID_SERIAL}=="?*",
ENV{ID_IFACE}=="", SYMLINK+="snd/by-id/$env{ID_BUS}-$env{ID_SERIAL}"
/lib/udev/rules.d/60-persistent-alsa.rules:ENV{ID_PATH}=="?*",
SYMLINK+="snd/by-path/$env{ID_PATH}"
moriah ~ #
BillK
On Wed, 2012-08-22 at 20:35 -0700, Cinder wrote:
> I have tried creating this rule:
>
> /etc/udev/rules.d/40-seq.rules
> KERNEL=="snd/seq", GROUP="audio", MODE="0666"
>
> ...but I'm not sure about the kernel key pair. I have tried matching
> "/dev/snd/seq" and just "seq"
> aswell.
>
> The Bug 406871 for sys-fs/udev-171-r5 looks exactly right, butI have
> sys-fs/udev-171-r6 installed. I''l check my kernel config and try disabling
> tmpfs. I have read that it helps real time audio performanc with
> jack(audio-connection-kit)though.
>
> I have tried removing all the rules in /etc/udev/rules.d. but the mode and
> permissions on /dev/snd/seq persist.
>
> Thanks for everyones help.
>
> --- [email protected] wrote:
>
> From: Marc Joliet <[email protected]>
> To: [email protected]
> Subject: Re: [gentoo-user] /dev/snd/seq access mode and permission
> Date: Fri, 17 Aug 2012 21:20:08 +0200
>
> Am Fri, 17 Aug 2012 11:40:47 +0200
> schrieb Marc Joliet <[email protected]>:
>
> > Am Fri, 17 Aug 2012 01:54:34 -0700
> > schrieb Cinder <[email protected]>:
> >
> > > Hi, how do I make changes to permissions and access mode of device nodes
> > > persistent? At the moment I have to chown and chmod the /dev/snd/seq node
> > > every boot to make it accessible to my user. the other nodes are fine.
> > > Here's the output of ls -l /dev/snd/
> > >
> > > total 0
> > > drwxr-xr-x 2 root root 60 Aug 17 18:44 by-path
> > > crw-rw----+ 1 root audio 116, 12 Aug 17 18:44 controlC0
> > > crw-rw----+ 1 root audio 116, 11 Aug 17 18:44 hwC0D0
> > > crw-rw----+ 1 root audio 116, 10 Aug 17 18:44 hwC0D3
> > > crw-rw----+ 1 root audio 116, 9 Aug 17 18:44 hwC0D4
> > > crw-rw----+ 1 root audio 116, 8 Aug 17 18:44 hwC0D5
> > > crw-rw----+ 1 root audio 116, 7 Aug 17 18:44 pcmC0D0c
> > > crw-rw----+ 1 root audio 116, 6 Aug 17 18:44 pcmC0D0p
> > > crw-rw----+ 1 root audio 116, 5 Aug 17 18:44 pcmC0D1p
> > > crw-rw----+ 1 root audio 116, 4 Aug 17 18:44 pcmC0D3p
> > > crw-rw----+ 1 root audio 116, 3 Aug 17 18:44 pcmC0D7p
> > > crw-rw----+ 1 root audio 116, 2 Aug 17 18:44 pcmC0D8p
> > > crw------- 1 root root 116, 1 Aug 17 18:44 seq
> > > crw-rw----+ 1 root audio 116, 33 Aug 17 18:44 timer
> > >
> > > I need /dev/snd/seq to look look the others. I can't find the udev rule
> > > or configuration that creates these nodes. Many thanks for any
> > > consideration.
> >
> > I have a hack for the same issue in my /etc/local.d/. A comment I put there
> > says this:
> >
> > # this is caused by using devtmpfs, which creates nodes with root:root and
> > 600;
> > # I believe this is fixed by udev upstream
> >
> > So devtmpfs creates the device node before udev runs, but udev does not
> > correct
> > the access permissions, which is however fixed by udev upstream (perhaps
> > already in ~arch?). Sadly I do not remember where I read this, but google
> > should
> > be of help there.
>
> Ah, yes, I did a quick search on b.g.o and found this:
>
> https://bugs.gentoo.org/show_bug.cgi?id=406871
>
> So my comment is wrong, it doesn't have anything to do with devtmpfs, but udev
> upstream did fix it :) .
>
> HTH
