Hello,

In case someone is having similar issues, this problem seems to have disappeared (latency ran for a whole week without any overrun or high latencies) after a microcode update :

CONFIG_MICROCODE=y
CONFIG_MICROCODE_INTEL=Y

& on lubuntu :
apt-get install intel-microcode

dmesg now shows :
microcode: CPU0 sig=0x695, pf=0x80, revision=0x2
microcode: CPU0 updated to revision 0x47, date = 2004-11-09

This is on a Pentium M 1300.

Florian

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