auf meinem RootL schläft alles ein. Nach mehreren Diagnosen habe ich den übeltäter gefunden:
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# hdparm /dev/hda
/dev/hda:
multcount = 16 (on)
IO_support = 3 (32-bit w/sync)
unmaskirq = 0 (off)
using_dma = 0 (off)
keepsettings = 0 (off)
readonly = 0 (off)
readahead = 256 (on)
geometry = 16383/255/63, sectors = 80026361856, start = 0
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# hdparm -m 16 -d 1 -c 3 /dev/hda
/dev/hda:
setting 32-bit IO_support flag to 3
setting multcount to 16
setting using_dma to 1 (on)
HDIO_SET_DMA failed: Operation not permitted
multcount = 16 (on)
IO_support = 3 (32-bit w/sync)
using_dma = 0 (off)
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[*] Generic PCI bus-master DMA support
[ ] Force enable legacy 2.0.X HOSTS to use DMA
[*] Use PCI DMA by default when available
[ ] Enable DMA only for disks
<M> VIA82CXXX chipset support