Ubuntu
linux-source-2.6.20 package

max_cstate and laptop very slow

Bug #107758 reported by jf001
4
Affects Status Importance Assigned to Milestone
linux-source-2.6.20 (Ubuntu)
Invalid
Undecided
Unassigned

Bug Description

Binary package hint: linux-image-2.6.20-15-generic

I'm using a sony VAIO VGN-FS315H laptop with Ubuntu feisty.

With the default config, my laptop is very very slow, and my CPU is always 100% used.

If I load the processor kernel module with option max_cstate=1, my laptop is faster and my CPU dynamics ajust its frequency.
But with this option my battery has a very low life, and I can stay disconnect from sector only for 30 minutes.

I had this problem since Ubuntu Edgy. I'm using a generic kernel image.

Thanks.

Revision history for this message
Steven Harms (sharms) wrote :

When your processor is at 100% can you upload the output of "ps aux"

Changed in linux-source-2.6.20:
status: Unconfirmed → Needs Info
Revision history for this message
jf001 (jf-meteo-strasbourg) wrote :

The output of ps is the same with ou whithout max_cstate option.

For example the boot process is 3 ou 4 times slower without max_cstate.

My processor is :
 cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 13
model name : Intel(R) Pentium(R) M processor 1.73GHz
stepping : 8
cpu MHz : 798.000
cache size : 2048 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss tm pbe nx up est tm2
bogomips : 1597.89
clflush size : 64

Revision history for this message
jf001 (jf-meteo-strasbourg) wrote :

Everything is ok with linux-image-2.6.20-15-386

Revision history for this message
Launchpad Janitor (janitor) wrote :

[Expired for linux-source-2.6.20 (Ubuntu) because there has been no activity for 60 days.]

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