Bug 221728

Summary:	/proc/cpuinfo doesn't report the 'est' (Enhanced SpeedStep) flag on Mobile Pentium 4 M cpu
Product:	[Fedora] Fedora	Reporter:	Tadej Janež <tadej.j>
Component:	kernel	Assignee:	Kernel Maintainer List <kernel-maint>
Status:	CLOSED CANTFIX	QA Contact:	Brian Brock <bbrock>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	6	CC:	wtogami
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2007-03-19 22:00:19 UTC	Type:	---
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Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Tadej Janež 2007-01-06 23:00:25 UTC

Description of problem:
According to Intel's documentation, this cpu should support the Enhanced
SpeedStep, however, the current kernel doesn't report it so.
See: http://support.intel.com/support/processors/mobile/pentium4/sb/CS-007499.htm

Generally, this would not be a real problem, however, the new cpuspeed's init
script greps /proc/cpuinfo flags line for the 'est' flag, and if the flag is
found, then loads the acpi-cpufreq kernel module. In my case, the 'est' flag is
not found and cpuspeed fails to start (see cpuspeed's bug 219921).

Here is the /proc/cpuinfo contents:
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 15
model           : 2
model name      : Mobile Intel(R) Pentium(R) 4 - M CPU 1.80GHz
stepping        : 7
cpu MHz         : 1800.000
cache size      : 512 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 mtrr pge mca cmov pat pse36
clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe up cid
bogomips        : 3590.67

Version-Release number of selected component (if applicable):
kernel-2.6.18-1.2869.fc6
cpuspeed-1.2.1-1.42.fc6

I'm not sure if I should rather file this bug upstream or not, any pointers
would be appreciated.

Comment 1 Dave Jones 2007-03-19 22:00:19 UTC

Check if it's an option in your BIOS.
If it isn't, there's not much we can do. We're reading this straight from the
hardware and reporting it directly.