On Sat, 05 Apr 2014 10:16:10 -0400 (EDT), Brian Potkin wrote: > > The following was done on an install from d-i's Jessie Alpha 1 release. > Only the base system was installed, so no DE. > > 1. Observed that 70-persistent-net.rules was created by 'Detect network > hardware' and was present on first boot of the new system. > > 2. Adding a USB wireless adapter resulted in an entry being appended to > 70-persistent-net.rules. > > 3. Deleted the file. 'udevadm trigger --action=add' re-created it with > all interfaces present. > > 4. Deleted the file again and rebooted. > > 5. 70-persistent-net.rules did not exist but the udevadm command creates > it. > > 6. Rebooted with 'net.ifnames=1' after deleting 70-persistent-net.rules. > > 7. Data is not added when the USB adapter is inserted, the udevadmn > command has ceased to work and 70-persistent-net.rules is not > present.
Thanks for your research, Brian. None of the above surprises me, based on what I've learned so far. The problem is, at boot time, the /etc/udev/rules.d directory, which is part of the root file system, is not writable. Either the permanent root file file system is not mounted yet (the initial RAM file system is still mounted), or the permanent root file system is mounted, but it is still mounted read only at the time the boot code needs to create or update it. The two scenarios that have been discussed so far are (1) the file does not get created at boot time if it is missing, and (2) a new entry for a new NIC that is discovered at boot time is not appended to the file. Both of these scenarios involve writing to /etc/udev/rules.d/70-persistent-net.rules before the file is writable. In the past, the init scripts contained a work-around for this problem by re-directing output to a temporary file. Originally, this file was called /dev/.udev/tmp-rules--70-persistent-net.rules. In later releases, the name of the temporary file was changed to /run/udev/tmp-rules--70-persistent-net.rules. Once the permanent root file system was mounted read/write, the temporary file was appended to /etc/udev/rules.d/70-persistent-net.rules. This logic is either absent or incomplete in jessie. Try this. cd /etc grep -r tmp-rules . Compare the output on a wheezy system and a jessie system. I suspect that this is at least part of the problem. -- .''`. Stephen Powell : :' : `. `'` `- -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
