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4 Posts
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7434
August 18th, 2004 14:00
Dell Inspiron 5150 - Low CPU speed
Hi,
I've just got back my Inspiron at my office, coming back from Dell support for a motherboard problem.
I've just installed a Gentoo, as it was set up before the motherboard change.
The really ennoying problem is that when I boot, the CPU is detected correctly at boot:
-> cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 2
model name : Mobile Intel(R) Pentium(R) 4 CPU 3.06GHz
stepping : 9
cpu MHz : 3059.921
cache size : 512 KB
physical id : 0
siblings : 1
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 pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe cid
bogomips : 5996.54
The problem is that the CPU doesn't run at ~3GHz, 400-500MHz would be more realistic. I've tried a small soft (bogo) that gives me ~900 BogoMIPS. I know that BogoMIPS is not a really relevant measure, but here it shows the gap. For information, I'm running a homemade 2.6.8.1-SMP kernel, but it was the same with the generic 2.4.26 gentoo kernel. I've flashed the BIOS with the A36, in case of...
I don't know what to do, so if anyone has an idea it would be greetly appreciated.
Thank you,
Kerso.
I've just got back my Inspiron at my office, coming back from Dell support for a motherboard problem.
I've just installed a Gentoo, as it was set up before the motherboard change.
The really ennoying problem is that when I boot, the CPU is detected correctly at boot:
-> cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 2
model name : Mobile Intel(R) Pentium(R) 4 CPU 3.06GHz
stepping : 9
cpu MHz : 3059.921
cache size : 512 KB
physical id : 0
siblings : 1
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 pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe cid
bogomips : 5996.54
The problem is that the CPU doesn't run at ~3GHz, 400-500MHz would be more realistic. I've tried a small soft (bogo) that gives me ~900 BogoMIPS. I know that BogoMIPS is not a really relevant measure, but here it shows the gap. For information, I'm running a homemade 2.6.8.1-SMP kernel, but it was the same with the generic 2.4.26 gentoo kernel. I've flashed the BIOS with the A36, in case of...
I don't know what to do, so if anyone has an idea it would be greetly appreciated.
Thank you,
Kerso.
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kerso
4 Posts
0
August 25th, 2004 14:00
I think I identified the problem:
- cpu throttling is set at state T6 at boot
- I can change it up up to T7 but not downgrading it lower than T6
Could it comes from ACPI kernel management, BIOS, hardware...
Any suggestion would be greatly appreciated.
Kerso.
msbridges
1 Message
0
August 27th, 2004 16:00
reefcrazed
81 Posts
0
August 28th, 2004 00:00
kerso
4 Posts
0
August 30th, 2004 09:00
Anyway, as I said, the gentoo install kernel is a generic 2.4.26, without SMP, and the speed was the same. But maybe cpufreq was also activated, I'm going to try without, as said below.
UPDATE: I've tried with cpufreq disabled, it gives the same results, also without ACPI. I'm pretty sure it's an hardware problem at this point, due to motherboard relpacement.
Message Edited by kerso on 08-30-2004 02:53 PM
seancoates
16 Posts
0
September 13th, 2004 03:00
http://forums.us.dell.com/supportforums/board/message?board.id=insp_general&message.id=148354
Maybe you got my dud. (-:
S
Agent Orange
203 Posts
0
September 13th, 2004 06:00
another thing to look at are the files in /sys/devices/system/cpu/cpu0/cpufreq/ which will tell you what scaling etc that cpufreqd is using. might be some leads in there.