[Bug 277085] [NEW] Can't enable Hyper-Threading

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Intrepid 2.6.27-4-generic on IBM Thinkpad T30:

 cat /proc/cpuinfo 
processor	: 0
vendor_id	: GenuineIntel
cpu family	: 15
model		: 2
model name	: Mobile Intel(R) Pentium(R) 4 - M CPU 2.00GHz
stepping	: 7
cpu MHz		: 1998.290
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 sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe up pebs bts cid xtpr
bogomips	: 3996.58
clflush size	: 64
power management:

Processor has a HT flag as you see above, kernel was booted with
parameters hpet=force and ht=on but ...

dmesg|grep -A 5 -B 5 Hyper-Threading
[    0.004488] Initializing cgroup subsys ns
[    0.004497] Initializing cgroup subsys cpuacct
[    0.004502] Initializing cgroup subsys memory
[    0.004535] CPU: Trace cache: 12K uops, L1 D cache: 8K
[    0.004542] CPU: L2 cache: 512K
[    0.004547] CPU: Hyper-Threading is disabled
[    0.004576] Checking 'hlt' instruction... OK.
[    0.020787] SMP alternatives: switching to UP code
[    0.032045] Freeing SMP alternatives: 12k freed
[    0.032053] ACPI: Core revision 20080609
[    0.040801] ACPI: Checking initramfs for custom DSDT

** Affects: linux-meta (Ubuntu)
     Importance: Undecided
         Status: New

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Can't enable Hyper-Threading
https://bugs.launchpad.net/bugs/277085
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