[Bug 218686] Fail to set energy_performance_preference of amd processor on asus ga403uv

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=218686

--- Comment #55 from Perry Yuan(AMD) (Perry.Yuan@amd.com) ---
(In reply to xiaojian.du from comment #53)
> (In reply to Dacian B from comment #52)
> > Hello Perry, Mike,
> > 
> > So, i've stumbled upon this thread regarding the amd-pstate driver and
> after
> > hours of bashing my head against the wall, i can confirm that i face a
> > similar issue, but in my case its even worse since i use a chinese laptop
> > (so bios updates are kinda out of the question...).
> > I dont want to upset anyone, but to me at least AMD kinda dropped the ball
> > on this CPPC thing, since it should (at least in my opinion) be enabled by
> > default and not up to the vendors.
> > I will be following this thread if anything comes up...
> > 
> > Kind regards D
> 
> Yeah, totally understand you, but vendors has their process to release their
> production BIOS, it takes time.
> Like, you know, diff vendors will cut off their BIOS fucntions to deploy on
> diff models of baseboard.

(In reply to Dacian B from comment #52)
> Hello Perry, Mike,
> 
> So, i've stumbled upon this thread regarding the amd-pstate driver and after
> hours of bashing my head against the wall, i can confirm that i face a
> similar issue, but in my case its even worse since i use a chinese laptop
> (so bios updates are kinda out of the question...).
> I dont want to upset anyone, but to me at least AMD kinda dropped the ball
> on this CPPC thing, since it should (at least in my opinion) be enabled by
> default and not up to the vendors.
> I will be following this thread if anything comes up...
> 
> Kind regards D

CPPC is enabled by default on most of the systems as I know, asus ga403uv is
using an older version BIOS PI which not have enabled CPPC yet, AMD has
requested vendors to upgrade BIOS to new version. Before the pstate driver
enabled, you can load acpi_cpufreq driver as short term solution. 

Perry.

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