Re: kvm 76 - open /dev/kvm: No such device or address

[Matias Aguirre <maguirre@matware.com.ar>]

Dor Laor wrote:
> Matias Aguirre wrote:
>> Hi all,
>>
>> Im using 2.6.26.5 kernel and slackware-current distribution. I was 
>> compiled the latest 76 version of kvm and when i run kvm i return 
>> this error:
>>
>> open /dev/kvm: No such device or address
>> Could not initialize KVM, will disable KVM support
>>
>> The module is already loaded:
>>
>> # lsmod
>> Module                  Size  Used by
>> kvm_intel              33984  0
>> kvm                   116156  1 kvm_intel
>> nvidia               6886800  26
>>
>> And my CPU have VM support.
>>
>> # cat /proc/cpuinfo | grep vmx
>> 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 monitor ds_cpl vmx 
>> smx est tm2 ssse3 cx16 xtpr lahf_lm
>> 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 monitor ds_cpl vmx 
>> smx est tm2 ssse3 cx16 xtpr lahf_lm
>>
>> And the file permission:
>>
>> # dir /dev/kvm
>> crw-rwxr-- 1 root kvm 250, 0 2008-10-07 18:22 /dev/kvm
>>
>>
>> Any help?
>>
>> Thanks
>>
> chmod a+wx /dev/kvm will do the trick
> Regards, Dor
>
# dir kvm
crwxrwxrwx 1 root kvm 250, 0 2008-10-07 18:22 kvm

$ qemu mtwVirtual/slackware.img
open /dev/kvm: No such device or address
Could not initialize KVM, will disable KVM support


Same issue.

Its rarely, before i can work with kvm without problems but suddenly it 
not work any more.