Bug#408203: marked as done (Xen kernel has no /dev/snapshot support)
Your message dated Wed, 24 Jan 2007 10:53:35 +0100
with message-id <20070124095335.GA25038@wavehammer.waldi.eu.org>
and subject line Bug#408203: Xen kernel has no /dev/snapshot support
has caused the attached Bug report to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
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Debian bug tracking system administrator
(administrator, Debian Bugs database)
--- Begin Message ---
Package: linux-image-2.6.18-3-xen-amd64
Version: 2.6.18-7
The packaged amd64 Xen kernel (and perhaps others) in etch does not have
the /dev/snapshot node or underlying char device, and so is unable to do
userspace suspend. (The non-Xen kernel includes it.) Observe:
(in /var/log/hibernate.log)
Starting suspend at Tue Jan 23 21:19:49 EST 2007
hibernate: [00] Executing MiscLaunchAuxFunc1 ...
hibernate: [01] Executing CheckLastResume ...
hibernate: [01] Executing CheckRunlevel ...
hibernate: [01] Executing LockFileGet ...
hibernate: [01] Executing MiscLaunchAuxFunc2 ...
hibernate: [01] Executing NewKernelFileCheck ...
hibernate: [10] Executing EnsureUSuspendCapable ...
/dev/snapshot device not found.
hibernate: EnsureUSuspendCapable refuses to let us continue.
hibernate: Aborting.
hibernate: [01] Executing NoteLastResume ...
hibernate: [01] Executing MiscLaunchAuxFunc3 ...
hibernate: [01] Executing LockFilePut ...
Resumed at Tue Jan 23 21:19:50 EST 2007
Checking manually reveals this is indeed the problem:
[USER AND HOSTNAME REMOVED]:~$ uname -a
Linux [HOSTNAME REMOVED] 2.6.18-3-xen-amd64 #1 SMP Mon Dec 4 17:56:42
CET 2006 x86_64 GNU/Linux
[USER AND HOSTNAME REMOVED]:~$ ls -l /lib/libc.so.6
lrwxrwxrwx 1 root root 13 2007-01-07 13:23 /lib/libc.so.6 ->
libc-2.3.6.so
[USER AND HOSTNAME REMOVED]:~$ ls -al /dev/snapshot
ls: /dev/snapshot: No such file or directory
[USER AND HOSTNAME REMOVED]:~$ sudo mknod /dev/snapshot c 10 231
[USER AND HOSTNAME REMOVED]:~$ sudo head -c 1 /dev/snapshot
head: cannot open `/dev/snapshot' for reading: No such device
The expected behaviour is of course that the Xen kernel
includes /dev/snapshot support and that userspace suspend works.
It should be noted that when this same system boots 2.6.18-3-amd64
instead, suspend works as expected.
This system is a Dell XPS M1710 laptop with a 2GHz Intel Core 2 Duo
processor. (Other hardware details are presumably not pertinent.)
The suggested fix is to rebuild and repackage the Xen kernels
with /dev/snapshot support turned on, assuming the Xen kernels do
currently have that option. If not, then open a corresponding bug in the
Xen project's tracker.
--- End Message ---
--- Begin Message ---
On Tue, Jan 23, 2007 at 10:55:40PM -0500, Tristan Schmelcher wrote:
> The packaged amd64 Xen kernel (and perhaps others) in etch does not have
> the /dev/snapshot node or underlying char device, and so is unable to do
> userspace suspend. (The non-Xen kernel includes it.) Observe:
Xen does not support the power management. You have to use the Xen
included suspend functionality (which, of course, is currently not
available for the administrative domain).
Bastian
--
Leave bigotry in your quarters; there's no room for it on the bridge.
-- Kirk, "Balance of Terror", stardate 1709.2
--- End Message ---
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