On Thu, Sep 08, 2005 at 12:28:06PM +0100, Martin Vlk wrote: > Hi folks, > I am running a custom-built kernel 2.6.10 on an Intel Mobile P3 > processor. (Acer TravelMate 620, Debian 3.1) > > >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?
Not off hand. Though it is almost certainly a kernel problem, and quite likely an ACPI issue. Before investigating further, would it be possible for you to test a newer kernel, like 2.6.13. As you are doing a custom build, it shouldn't be too much bother to just get it from kernel.org. Or if you are relying on debian packages, get linux-source-2.6.12 from the Debian archive - we are currently working on getting 2.6.13 ready. The next thing that I would try is booting with pci=noacpi, or trying out the various acpi options listed in Documentation/kernel-parameters.txt in the kernel tree. This may end up making other things work in a less than optimal way, but it is a good way to explore if the problem is acpi related or not. -- Horms -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
