GNU bug report logs - #27636
/dev/kvm went missing on i686, Linux 4.12

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Package: guix; Reported by: Ricardo Wurmus <rekado@HIDDEN>; dated Mon, 10 Jul 2017 05:42:02 UTC; Maintainer for guix is bug-guix@HIDDEN.

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From: Mark H Weaver <mhw@HIDDEN>
To: Ricardo Wurmus <rekado@HIDDEN>
Subject: Re: bug#27636: /dev/kvm went missing on i686, Linux 4.12
References: <87y3rwetng.fsf@HIDDEN>
Date: Mon, 10 Jul 2017 13:29:18 -0400
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 10 Jul 2017 07:40:51 +0200")
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Ricardo Wurmus <rekado@HIDDEN> writes:

> Since the update to Linux 4.12 my i686 machine no longer has /dev/kvm.
> I ran =E2=80=9Cmodprobe kvm=E2=80=9D successfully, and =E2=80=9Clsmod=E2=
=80=9D shows =E2=80=9Ckvm=E2=80=9D, but the
> device node does not exist.
>
> Running =E2=80=9Cmodprobe kvm-intel=E2=80=9D prints:
>
>     modprobe: ERROR: could not insert 'kvm_intel': Input/output error

Does the kernel message buffer mention anything about "kvm" or "KVM"?

  dmesg | grep -i kvm

      Mark




Information forwarded to bug-guix@HIDDEN:
bug#27636; Package guix. Full text available.

Message received at 27636 <at> debbugs.gnu.org:


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Date: Mon, 10 Jul 2017 11:52:45 -0400
From: Leo Famulari <leo@HIDDEN>
To: Ricardo Wurmus <rekado@HIDDEN>
Subject: Re: bug#27636: /dev/kvm went missing on i686, Linux 4.12
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On Mon, Jul 10, 2017 at 07:40:51AM +0200, Ricardo Wurmus wrote:
> Since the update to Linux 4.12 my i686 machine no longer has /dev/kvm.
> I ran =E2=80=9Cmodprobe kvm=E2=80=9D successfully, and =E2=80=9Clsmod=E2=
=80=9D shows =E2=80=9Ckvm=E2=80=9D, but the
> device node does not exist.
>=20
> Running =E2=80=9Cmodprobe kvm-intel=E2=80=9D prints:
>=20
>     modprobe: ERROR: could not insert 'kvm_intel': Input/output error

I see the same thing on x86_64, but also with older kernels (at least
the 4.11 series).

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Information forwarded to bug-guix@HIDDEN:
bug#27636; Package guix. Full text available.

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From: Ricardo Wurmus <rekado@HIDDEN>
To: bug-guix@HIDDEN
Subject: /dev/kvm went missing on i686, Linux 4.12
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Since the update to Linux 4.12 my i686 machine no longer has /dev/kvm.
I ran “modprobe kvm” successfully, and “lsmod” shows “kvm”, but the
device node does not exist.

Running “modprobe kvm-intel” prints:

    modprobe: ERROR: could not insert 'kvm_intel': Input/output error

-- 
Ricardo

GPG: BCA6 89B6 3655 3801 C3C6  2150 197A 5888 235F ACAC
https://elephly.net





Acknowledgement sent to Ricardo Wurmus <rekado@HIDDEN>:
New bug report received and forwarded. Copy sent to bug-guix@HIDDEN. Full text available.
Report forwarded to bug-guix@HIDDEN:
bug#27636; Package guix. Full text available.
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