[Openchrome-users] Fwd: opencrome in Debian 5 on Epia M.

[Xavier Bachelot]

John Robinson wrote:
> On 22/03/2009 14:56, Francesco Bochicchio wrote:
> [...]
>> For a while, I suspected CPU 
>> clock-stepping : with stock-kernel, the default was about 650 MHz, while 
>> with my kernel and stepping disabled is fixed at 1 GHz . I thought that 
>> maybe playing a video would require the kernel to increase CPU frequency 
>> and that did not
>> work because of some weird difference between intel CPU and VIA CPU. 
>>  However, this should happen also with
>> non-accelerated X driver (even more so), and instead that was fine.
> 
> Other way round, I think - with the acceleration available, the CPU can 
> drop its frequency during playback, which isn't possible with the 
> non-accelerated driver. I know this used to cause a problem (in that the 
> speed change sometimes locked up when there was a lot of I/O going on) 
> but I thought it had long since been fixed - or maybe the Fedora/CentOS 
> kernels I've used have just had it disabled for all this time.
> 
I think it was never really fixed and the support is disabled by
default. Grep for CONFIG_X86_LONGHAUL in your kernel config.

X.