Re: Xen Kernel NVidia and power save

["Jerry Feldman-2" <user=4@nabble.blu.org>]

 Thanks Jarod, 
I have Centos 5.2 which is the RHEL 5.2 kernel. 

On 08/20/2008 03:05 PM, Jarod Wilson wrote: 
> On Wed, 2008-08-20 at 14:55 -0400, Jerry Feldman wrote: 
>   
>> I found that the nvidia supplied driver would not work in a xen enabled 
>> kernel, but it does install in the non-xen enabled version of the same 
>> kernel. I was just wondering if anyone had the same experience. At this 
>> point, it is not very important, more curiosity. 
>>     
> 
> I believe its a known issue. 
> 
>   
>> Second, I was having problems getting power save to work properly. After 
>> playing with the nvidia driver, I booted into the non-xen enabled 
>> kernel, and now power save is working. So, I was wondering if there is 
>> something in the xen-enabled kernel that prevents power save from 
>> working. I have not booted back into the xen kernel to make sure it 
>> works or not. Ideally, the virtual machine software, whether the xen 
>> hypervisor or VMWare or Virtualbox should handle power management, so 
>> this is simply an RTFM question that I'll figure out next week after the 
>> installfest when I may have some time. 
>>     
> 
> One of the huge problems with the xen hypervisor is that it attempts to 
> entirely reinvent the wheel -- which includes proper support for cpu 
> frequecy scaling and acpi in general. 
> 
> In Red Hat Enterprise Linux 5.2's kernel-xen, there's rudimentary freq 
> scaling support for certain cpus. 
> 
> 
> 
>