On Wed, Apr 06, 2011 at 08:18:06PM +0900, Norbert Preining wrote: > Follow up to this bug report: downgrading base-files and rm -rf /run > did help and get me back a running system. > > <rant on> > Does the maintainer of soemthing like *base-files* at least *once* > reboot into his own machine before he uploads? It seems not so, that > is a bug that does effect everyone as far as I see. > <rant off>
Hi Norbert, I tested this patch several times before it was uploaded. I never once saw this behaviour, because it was introduced in the new version of udev uploaded the day before, and so during the testing period udev was behaving correctly. The bug here is udev's misplaced assumption that the mere presence of the /run directory implies that it is OK to use it, which is not valid due to initscripts needing to set things up for this to work. This would require udev to have a versioned depends upon initscripts to guarantee that /run is usable, which is the way this was planned from the start. However, udev implemented (broken) support for /run before the directory was even present on the system, which is the root cause of the problem; udev appears to break systems pretty effectively when it can't write to /run (it breaks at a minimum loading of radeon/ttm/fbcon, networking and locks up the console starting X, including the keyboard, requiring a hard reset; removing /run fixes this). This is a failure mode in udev which it should be handling rather more gracefully; it looks like the /run support in udev could do with some further testing. The best solution here would be for udev to disable the use of /run for the time being, and then once initscripts has been modified to support /run (patch tested, currently waiting for maintainer upload) it can re-enable /run support without fear of causing breakage, and without the need to do any checks that /run is safe to use (though for such a critical package as udev, it should probably test to ensure the fallbacks don't break as at present). I can additionally add a Breaks: udev (= 167-1) to initscripts to ensure that udev is not using /run during the upgrade, but we need a fixed version to replace it before that can be done. Regards, Roger -- .''`. Roger Leigh : :' : Debian GNU/Linux http://people.debian.org/~rleigh/ `. `' Printing on GNU/Linux? http://gutenprint.sourceforge.net/ `- GPG Public Key: 0x25BFB848 Please GPG sign your mail.
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