Hello,

I have the same error as follows - these lines begin at line 438 of the
file, which is nearly the end of it.

[  117.926535] Marking TSC unstable due to: cpufreq changes.
[  117.934315] Time: acpi_pm clocksource has been installed.
[  118.140441] NET: Registered protocol family 10
[  118.141179] lo: Disabled Privacy Extensions
[  118.286247] Clocksource tsc unstable (delta = -179973678 ns)

When I added clocksource=acpi_pm to the menu.list entry for my newest
kernel Ubuntu 8.04.1, kernel 2.6.24-22-generic, and rebooted, I was
treated to a desktop where I was unable to get the drop down menu panel
to drop down where I could use it, and the title bars and status bars of
all applications were missing. I tried ALT-F2 for the Run command
dialog, but that wouldn't come up, and ALT-F1 would not make the menu
show either.

I was able to start a File Browser by clicking the Wine folder on the
desktop, and from there was able to start a root terminal and capture
the output of dmesg to file. Here is the same section from that file as
is shown above from my more or less normal boot. - These start at line
number 446 in the file.

[  125.496519] Marking TSC unstable due to: cpufreq changes.
[  125.852215] Clocksource tsc unstable (delta = -178014284 ns)
[  126.007526] NET: Registered protocol family 10
[  126.008274] lo: Disabled Privacy Extensions

I did find this line at line 238 of the file, which makes me wonder why
TSC still tried to install later.

[   26.594400] Time: acpi_pm clocksource has been installed.

I then removed the clocksource=acpi_pm from the menu.list file, and had
to use the power button to shut down, and restart the computer. On this
boot it came up normally again.

I have been having problems with every fifth boot or so leaving me in
the condition that the menus will not drop down out of hiding, ever
since I updated to this kernel. Once in a while it will happen on two
boot ups in a row, and I will then boot to the next previous kernel
which works right all the time.

I am attaching the output of the dmesg command for the boot up where the
menus refused to drop down.

Thanks for any help you can be, Ray Parrish

** Attachment added: "Output of dmesg command on bad boot."
   http://launchpadlibrarian.net/20991533/dmesg2.txt

-- 
Clocksource tsc unstable add 10 seconds to the boot time.
https://bugs.launchpad.net/bugs/190414
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