AMD CPU Family #16 missing in /usr/share/powernowd/cpufreq-detect.sh

[Lupe Christoph]

AMD introduced a new family for the Phenom processor (I guess...). That family is not understood by cpufreq-detect.sh.

This probably resolves #198589, No cool n' quiet for amd phenom processors.

[rhi (rhi-deactivatedaccount)]

* Can confirm this problem: AMD Phenom processor is not recognized by cpufreq-detect.sh so powernowd doesn't load and CPU freq. scaling is not support by default (which is bad)
* Can confirm that this patch fixes the problem

[rhi (rhi-deactivatedaccount)]

(Ubuntu 8.04 AMD64)

[rhi (rhi-deactivatedaccount)]

Hm cpufreq-detect seems to detect the module now, but I just rebootet and powernow-k8 didn't get loaded anyway. cpuinfo showed full speed for all CPUs (while idling), then I manually loaded powernow-k8 and the cpu freq immediately went down

[Lupe Christoph (lupe)]

On Monday, 2008-05-12 at 09:47:58 -0000, Richard Hirner wrote:
> Hm cpufreq-detect seems to detect the module now, but I just rebootet
> and powernow-k8 didn't get loaded anyway. cpuinfo showed full speed for
> all CPUs (while idling), then I manually loaded powernow-k8 and the cpu
> freq immediately went down

I have done the following test:
1) remove the powernowd package
2) Reboot and check CPU throttling
   When I log into Gnome, I get a warning that CPU frequency scaling is
   unsupported. powernow-k8 is not loaded.
3) Install the powernowd package.
   The installation tries to start CPU frequency scaling and warns that
   it is not supported. This is from /etc/init.d/powernowd
4) Reboot and check CPU throttling
   Again, when I log into Gnome, I get a warning that CPU frequency
   scaling is unsupported. powernow-k8 is not loaded.
5) Change line 76 of /usr/share/powernowd/cpufreq-detect.sh to
   15|16)
6) Reboot and check CPU throttling
   No warning, CPU frequency scaling works, powernow-k8 module is
   loaded.

To compare, here is one core from /proc/cpuinfo:

processor : 3
vendor_id : AuthenticAMD
cpu family : 16
model : 2
model name : AMD Phenom(tm) 9750 Quad-Core Processor
stepping : 3
cpu MHz : 1200.000
cache size : 512 KB
physical id : 0
siblings : 4
core id : 3
cpu cores : 4
fpu : yes
fpu_exception : yes
cpuid level : 5
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc rep_good pni cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs
bogomips : 4800.40
TLB size : 1024 4K pages
clflush size : 64
cache_alignment : 64
address sizes : 48 bits physical, 48 bits virtual
power management: ts ttp tm stc 100mhzsteps hwpstate

HTH,
Lupe Christoph
--
| The whole aim of practical politics is to keep the populace alarmed |
| (and hence clamorous to be led to safety) by menacing it with an |
| endless series of hobgoblins, all of them imaginary. |
| H. L. Mencken, "In Defense of Women", 1918 |

[Fabrice Coutadeur (fabricesp)]

debdiff with the change in cpufreq-detect.sh

[Colin Watson (cjwatson)]

powernowd (1.00-1ubuntu2) intrepid; urgency=low

  * Load powernow-k8 on AMD Family 10h (Phenom) and 11h (Griffin/Puma)
    processors (thanks, Wouter de Groot; LP: #261608).

 -- Colin Watson <email address hidden> Tue, 16 Sep 2008 00:36:05 +0100