Hi folks,
I am running a custom-built kernel 2.6.10 on an Intel Mobile P3 processor. (Acer
TravelMate 620)
>From time to time it happens to me that on boot-up the USB mouse doesn't work.
When I try a USB camera in this situation it doesn't work either.
I discovered that when the USB devices don't work the BogoMIPS value calculated
is far lower than it should be. For example it is 32 whereas normally it should
be around 1450.
The low BogoMIPS value causes the USB init delays to be calculated too short and
the devices are not given enough time to initialize.
It happens in approximately 45% of boot-ups and the only way I know of to make
it work again is restart. Very often restart is needed multiple times before it
starts working again.
I tried to switch processor power management settings in BIOS, but with no
success so far. Also today I discovered another BIOS setting related to Intel
SpeedStep technology and I tried to change the value to try if I get any better
behaviour. Will see in few days.
Attached are log examples from both successful and unsuccessful boot-ups. I
noticed the detected processor speed varies and also different hi-res
timesources are used (tsc, pmtmr). Is that of any significance?
Any idea what the problem and solution is?
Thanks
Martin V.
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Hello Martin,
On Thu, 8 Sep 2005, Martin Vlk wrote:
> I am running a custom-built kernel 2.6.10 on an Intel Mobile P3 processor. (Acer
> TravelMate 620)
Please try it with a more recent kernel, there have been some patches
which take into consideration SMIs occuring during the calibration loop.
Thanks,
Zwane
> Please try it with a more recent kernel, there have been some patches
> which take into consideration SMIs occuring during the calibration
> loop.
I have now been running 2.6.13.1 for some time and it looks really promising.
The BogoMIPS value is now very "stable", i.e. not changing greatly from boot
to boot.
I will report back if this hope happens to fail, but let it not be the case.
Thank you all for advice.
vlcak