Arch Linux

artjermyn

Member

Registered: 2015-05-04

Posts: 9

Slow system after resume from suspend

Whenever my laptop is resumed from suspend the system runs much slower.
This happens on all linux 4.x kernels and when I downgrade to 3.19 or lower the problem disappears.

I've looked at htop and such and it looks like all my processes are running higher after resume than before.
I've also noticed that my cpu freq also runs a lot higher.  It also maxes out a lot quicker and more.  usually is hovers at the min and rarely maxes out, but after suspend it just seems to hover about 100 mhz above normal and any process seems to make it jump to the max or close to it.

my cpuinfo (toshiba satellite laptop)

processor	: 0
vendor_id	: GenuineIntel
cpu family	: 6
model		: 42
model name	: Intel(R) Pentium(R) CPU B970 @ 2.30GHz
stepping	: 7
microcode	: 0x28
cpu MHz		: 899.875
cache size	: 2048 KB
physical id	: 0
siblings	: 2
core id		: 0
cpu cores	: 2
apicid		: 0
initial apicid	: 0
fpu		: yes
fpu_exception	: yes
cpuid level	: 13
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer xsave lahf_lm arat epb pln pts dtherm xsaveopt
bugs		:
bogomips	: 4591.03
clflush size	: 64
cache_alignment	: 64
address sizes	: 36 bits physical, 48 bits virtual
power management:

processor	: 1
vendor_id	: GenuineIntel
cpu family	: 6
model		: 42
model name	: Intel(R) Pentium(R) CPU B970 @ 2.30GHz
stepping	: 7
microcode	: 0x28
cpu MHz		: 900.414
cache size	: 2048 KB
physical id	: 0
siblings	: 2
core id		: 1
cpu cores	: 2
apicid		: 2
initial apicid	: 2
fpu		: yes
fpu_exception	: yes
cpuid level	: 13
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer xsave lahf_lm arat epb pln pts dtherm xsaveopt
bugs		:
bogomips	: 4591.03
clflush size	: 64
cache_alignment	: 64
address sizes	: 36 bits physical, 48 bits virtual
power management:

im currently running gnome-shell, but the same thing happens to me on openbox and i3 or with a fresh install.
im also using tlp, but this problem happens with or without any powersaving enabled.

i've search the internet but only found 1 other person with this problem: https://bbs.archlinux.org/viewtopic.php?id=199922 (my dmesg is included in this post)

anyone have any idea what could be happening or a solution to try?

gnufied

Member

Registered: 2015-04-15

Posts: 13

Re: Slow system after resume from suspend

I had similar sort of problem with my t450s - https://bbs.archlinux.org/viewtopic.php?id=200116

There is something funny in new kernel which is locking down the processor way way in low frequency.