[Bug 589553] [NEW] KVM fails on linux-image-2.6.31-22-generic-pae, worked on previous kernel

[Erik]

Public bug reported:

Binary package hint: linux-image-2.6.31-22-generic-pae

This morning I've installed the linux 2.6.31-22-generic-pae kernel on
Ubuntu Karmic through the update manager. If I boot into this new
kernel, KVM doesn't work. If I run the following command:

sudo qemu-enable-kvm

I get just a blank QEMU screen, nothing else happens. If I boot back
into my old 2.6.31-21-generic-pae it displays BIOS messages mentioning
that there is no disk to boot from. If I run a proper CD-ROM or disk
image, again it works in the old kernel while the new only gives a blank
QEMU screen. Plain QEMU (without the -enable-kvm switch) works on either
kernel.

No dmesg output appears on a failed attempt to run KVM.

uname -a: Linux hp364 2.6.31-22-generic-pae #60-Ubuntu SMP Thu May 27 01:40:15 UTC 2010 i686 GNU/Linux
qemu --version: QEMU PC emulator 0.12.4, Copyriht (c) 2003-2008 Fabrice Bellard

cat /proc/cpuinfo:

processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 23
model name	: Intel(R) Core(TM)2 Duo CPU     E8600  @ 3.33GHz
stepping	: 10
cpu MHz		: 1998.000
cache size	: 6144 KB
physical id	: 0
siblings	: 2
core id		: 0
cpu cores	: 2
apicid		: 0
initial apicid	: 0
fdiv_bug	: no
hlt_bug		: no
f00f_bug	: no
coma_bug	: no
fpu		: yes
fpu_exception	: yes
cpuid level	: 13
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc arch_perfmon pebs bts pni dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm sse4_1 xsave lahf_lm tpr_shadow vnmi flexpriority
bogomips	: 6650.50
clflush size	: 64
power management:

processor	: 1
vendor_id	: GenuineIntel
cpu family	: 6
model		: 23
model name	: Intel(R) Core(TM)2 Duo CPU     E8600  @ 3.33GHz
stepping	: 10
cpu MHz		: 1998.000
cache size	: 6144 KB
physical id	: 0
siblings	: 2
core id		: 1
cpu cores	: 2
apicid		: 1
initial apicid	: 1
fdiv_bug	: no
hlt_bug		: no
f00f_bug	: no
coma_bug	: no
fpu		: yes
fpu_exception	: yes
cpuid level	: 13
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc arch_perfmon pebs bts pni dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm sse4_1 xsave lahf_lm tpr_shadow vnmi flexpriority
bogomips	: 6649.88
clflush size	: 64
power management:

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

-- 
KVM fails on linux-image-2.6.31-22-generic-pae, worked on previous kernel
https://bugs.launchpad.net/bugs/589553
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