http://qa.mandrakesoft.com/show_bug.cgi?id=6175
Product: kernel
Component: default
Summary: Complete freeze with Intel Speedstep activation on Dell
laptop
Product: kernel
Version: 2.4.22-17mdk
Platform: PC
OS/Version: All
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: default
AssignedTo: [EMAIL PROTECTED]
ReportedBy: [EMAIL PROTECTED]
I have had problems with my Dell Latitude C640 laptop and Mandrake 9.2, kernel
2.4.22 (the default kernel). When the powercord is plugged/unplugged the whole
machine freezes (forced powerdown + reboot needed). Normally when you
plug/unplug the power, the processor switches speed from 1.8 to 1.6 GHz and some
other power save settings are applied.
The problem turns out to be the Intel Speedstep. When I disable this in my Bios
the problem goes away, and I can unplug/plug normally with all power save
functions enabled in the Bios and kernel.
For your information:
* The problem is not there with mdk 9.1, and 9.2RC1 (did not try RC2).
* the bug is 100% reproducible (everytime) on my machine with mdk 9.2 default
kerne;.
* the bug could be reproduced with the secure kernel provided by mdk 9.2.
* passing the nolapic option to the kernel did not fix it.
* enable ACPI, force no APIC (in bootloader options) did not fix it.
* Disabling all power save options in the Bios did not work either (even not
after recompile).
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