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RayDude
Advocate
Joined: 29 May 2004
Posts: 2091
Location: San Jose, CA
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 Posted: Sat Nov 11, 2017 6:50 pm Post subject: 4.13.12 kernel causes cpu freq to lock to max, system hot |
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I upgraded to 4.13.12 kernel and the Ryzen is stuck at 3700 MHz. It worked fine with 4.12, any idea what changed?
Here's the kernel config. I copied it from the previous kernel and then added features trying to get it to work...
| Code: |
-*- CPU Frequency scaling │ │
│ │ [*] CPU frequency transition statistics │ │
│ │ Default CPUFreq governor (ondemand) ---> │ │
│ │ -*- 'performance' governor │ │
│ │ <*> 'powersave' governor │ │
│ │ <*> 'userspace' governor for userspace frequency scaling │ │
│ │ -*- 'ondemand' cpufreq policy governor │ │
│ │ <*> 'conservative' cpufreq governor │ │
│ │ [*] 'schedutil' cpufreq policy governor │ │
│ │ *** CPU frequency scaling drivers *** │ │
│ │ -*- Intel P state control │ │
│ │ <*> Processor Clocking Control interface driver │ │
│ │ <M> ACPI Processor P-States driver │ │
│ │ [*] Legacy cpb sysfs knob support for AMD CPUs │ │
│ │ <M> AMD Opteron/Athlon64 PowerNow! │ │
│ │ <M> AMD frequency sensitivity feedback powersave bias │ │
│ │ < > Intel Enhanced SpeedStep (deprecated) │ │
│ │ < > Intel Pentium 4 clock modulation │ │
│ │ *** shared options ***
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acpu_cpufreq is loaded:
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lsmod | grep acpi
acpi_cpufreq 20480 0
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The behavior of /proc/cpuinfo may have changed. It used to report actual frequency. Now it seems to report max frequency.
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cat /proc/cpuinfo | grep MHz
cpu MHz : 3692.860
cpu MHz : 3692.860
cpu MHz : 3692.860
cpu MHz : 3692.860
cpu MHz : 3692.860
cpu MHz : 3692.860
cpu MHz : 3692.860
cpu MHz : 3692.860
cpu MHz : 3692.860
cpu MHz : 3692.860
cpu MHz : 3692.860
cpu MHz : 3692.860
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But cpufreq is trying to run the cores at 1550:
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cat /sys/devices/system/cpu/cpu?/cpufreq/cpuinfo_cur_freq
1550000
1550000
1550000
1550000
1550000
1550000
1550000
1550000
1550000
1550000
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Has anyone seen or dealt with this? What is actually going on?
The only reason I doubt the numbers from cpufreq is the fact that the case is much warmer with this kernel than it was with the last.
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Some day there will only be free software. |
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tholin
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Joined: 04 Oct 2008
Posts: 207
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RayDude
Advocate
Joined: 29 May 2004
Posts: 2091
Location: San Jose, CA
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| Posted: Sun Nov 12, 2017 7:20 pm Post subject: Re: 4.13.12 kernel causes cpu freq to lock to max, system ho |
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I had seen the thread with Linus flaming a developer. I hadn't realized it was this change.
The heat may just be the fans being controlled better. Although I thought that was controlled by the BIOS and it's definitely a difference between the kernels.
I'll look for the stable 4.14 when it comes out.
Thanks.
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