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Bug#354995: marked as done (amd64-k8-smp kernel makes clock run fast)

Your message dated Sun, 5 Aug 2007 01:22:50 +0200
with message-id <20070804232250.GA28855@stro.at>
and subject line amd64-k8-smp kernel makes clock run fast
has caused the attached Bug report to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what I am
talking about this indicates a serious mail system misconfiguration
somewhere.  Please contact me immediately.)

Debian bug tracking system administrator
(administrator, Debian Bugs database)

--- Begin Message ---
Package: kernel-image-2.6.8-11-amd64-k8-sm
Version: 2.6.8-16sarge1

System: Debian amd64 Sarge
Architecture: AMD Athalon 64 X2
Libc6: 2.3.5-13

I am experiencing an odd sort of system bug on a new install of sarge (amd64). The system clock runs too fast and the keyboard speed (typmmmmaaaatic rate) keeps fluctuating radically. Typing becomes nearly impossible after a time. This seems to get worse if the machine is left on over night to the point of the clock being lapped by a day as compared to real time and the keyboard too fast to even type the “kbdrate” command. All I can do is reboot witch temporarily cures the keyboard problems. It was interesting to watch the little mail notification tux on “gkrellm” roll with wildly varying rates even while the system was lightly loaded (faster movement coincided with CPU usage spikes).

These bugs seem to be directly related to the CPU / IO usage. I can make the clock run roughly 2x the normal speed if I “cat /dev/urandom. Rapidly moving the mouse can also induce a mild version of the effect. Both actions result in sporadic intensification of the keyboard problem. The effect appears to be unrelated to what applications are using the CPUs.

I can reset the system time and the keyboard speed, with “kbdrate” but the effect is only temporary. I believe this to be a kernel because if I switch kernels or no SMP 2.6.8-11 kernel this effect stops. As a consequence of the buggy nature of this 2.6.8-11 kernel I installed “linux-image-2.6.15-1-amd64-k8-smp” V 2.6.15-7 from testing and this kernel appears more stable (has run for 24 hours with no observation of this bug). However, I have not tested it for long enough to be sure.


James C. Baldwin

James C. Baldwin, PhD
501 N. Walnut St.
Madison, WI 53726

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--- Begin Message ---
Package: linux-2.6
Version: 2.6.16-1

> I was finally able to upgrade to kernel 2.6.16, and the bug has
> disappeared for me now. 

ok cool, late bug closing..


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