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#1 2013-05-23 10:45:06

firewalker
Member
From: Hellas (Greece).
Registered: 2006-06-05
Posts: 455

High temperature after suspend to RAM with linux-3.9.2-1.

After the update to linux-3.9.2-1 my laptop works on higher temperature after resuming from suspend to RAM. Works fine with linux 3.8.7-1.

Normal working temperature is 47~49 degrees Celsius and after resuming it is 59~61. It's not just a false temperature reading. I can actually feel the laptop warmer, and the CPU fun spins up.

I can't see any CPU high load. I tend to believe that the temperature rise has to do with the Intel GPU driver (i915). My CPU has an integrated GPU.

Intel(R) Core(TM) i3-2350M CPU @ 2.30GHz

VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)

cmdline:
i915.semaphores=1 i915.i915_enable_rc6=1 i915.i915_enable_fbc=1 i915.lvds_downclock=1 aspm_force=true acpi_backlight=vendor intel_pstate=disable

Anyone noticed something similar?

Ways to debug it? Apart from kernel GIT bisect.


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#2 2013-05-24 09:22:36

stupidus
Member
Registered: 2012-02-27
Posts: 69

Re: High temperature after suspend to RAM with linux-3.9.2-1.

You should take a look into this thread: https://bbs.archlinux.org/viewtopic.php?id=150743

It is not sure though if it is still the same bug as in 3.6.x, but anyway there is a lot of discussion going on in that thread also for 3.9.x

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#3 2013-05-24 09:27:42

firewalker
Member
From: Hellas (Greece).
Registered: 2006-06-05
Posts: 455

Re: High temperature after suspend to RAM with linux-3.9.2-1.

Thanks you.


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#4 2013-05-24 15:18:48

tobsen
Member
Registered: 2011-10-13
Posts: 36

Re: High temperature after suspend to RAM with linux-3.9.2-1.

I just wonder why you use all these options. Most of them should be default in the current kernel. And why do you disable the pstate driver? I have a similar setup just an i5-2520M and my temps are 5 - 10 degrees lower (using powerdown and thermald from aur).

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#5 2013-05-24 15:27:09

firewalker
Member
From: Hellas (Greece).
Registered: 2006-06-05
Posts: 455

Re: High temperature after suspend to RAM with linux-3.9.2-1.

When I configured my system those options wasn't enabled. Intel pstate was causing troubles with power governors and frequency scaling.


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#6 2013-05-27 08:10:37

donniezazen
Member
From: Salt Lake City
Registered: 2011-06-24
Posts: 671
Website

Re: High temperature after suspend to RAM with linux-3.9.2-1.

Just a side note. Feel free to get rid of aspm_force=true. It is no longer needed.

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#7 2013-05-27 14:10:53

Strike0
Member
From: Germany
Registered: 2011-09-05
Posts: 1,277

Re: High temperature after suspend to RAM with linux-3.9.2-1.

I got the impression myself, that all the i915 downclock tweaks have been getting counterproductive over time as the driver got better.

Be sure to give the new pstate another go. I had problems too with the upgrade to 3.9.x and the powersave governor. Enabling "performance" in cpupower only and letting intel_pstate manage the idling on its own had an awesome effect. I only have rc6=1 and "sna" accel along with it on a similar cpu. Resuming with fan off.

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#8 2013-06-05 19:19:27

firewalker
Member
From: Hellas (Greece).
Registered: 2006-06-05
Posts: 455

Re: High temperature after suspend to RAM with linux-3.9.2-1.


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#9 2013-06-11 08:21:08

firewalker
Member
From: Hellas (Greece).
Registered: 2006-06-05
Posts: 455

Re: High temperature after suspend to RAM with linux-3.9.2-1.

My problem is i915 related. I found the offending patch.

[15239099d7a7a9ecdc1ccb5b187ae4cda5488ff9] drm/i915: enable irqs earlier when resuming.

http://o.cs.uvic.ca:20810/perl/cid.pl?c … cda5488ff9

Removing this patch, everything goes back to normal.


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