Bug 90129

Summary:	ID_ID in udev is about to change
Product:	PulseAudio	Reporter:	Adam Goode <adam>
Component:	modules	Assignee:	pulseaudio-bugs
Status:	RESOLVED MOVED	QA Contact:	pulseaudio-bugs
Severity:	normal
Priority:	medium	CC:	lennart
Version:	unspecified
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:

Description Adam Goode 2015-04-21 21:38:39 UTC

ID_ID in udev will no longer append the ALSA "id" sysattr. This means ID_ID will change to a new string after this update, but no longer be system unique for USB. (It is theoretically not system unique for firewire already, since broken devices can ship with a duplicate guid and no checking is done.)

The ALSA id sysattr is derived from some internal properties of the device by the kernel. It is actually a read/write attribute, but ALSA enforces uniqueness systemwide. This means that currently, ID_ID is enumeration dependent in the case of multiple identical hardware.

Please see this discussion: http://lists.freedesktop.org/archives/systemd-devel/2015-April/030925.html

This is essentially a revert of systemd ed1b2d9fc7d5c5bfe2a67b0b8ff9e5ea8694268e.

Comment 1 Lennart Poettering 2015-04-23 11:43:11 UTC

I figure this isn't high pressure to change in PA, given that this is a corner case. And I don't really know what the right approach actually is to fix this, but I think the original change should never have been added to udev's rules files, hence let's remove that from them.

Comment 2 GitLab Migration User 2018-07-30 10:08:57 UTC

-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.

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