Messages in this thread |  | | | Date | Thu, 16 Feb 2006 11:36:19 +0100 | | From | Folkert van Heusden <> | | Subject | Re: [BUG] kernel 2.6.15.4: soft lockup detected on CPU#0! |
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> From what i understand it will fix the problem only if the drive is in > PIO mode, which is the case for Folkert van Heusden, who reported the > same BUG output. > However it does not appear that my cdrom drives are using PIO, from the > logs i have they're supposed to use DMA : > >Feb 12 19:37:12 ruault kernel: hdc: ATAPI 40X CD-ROM CD-R/RW drive,2048kB Cache, DMA > > Feb 12 19:37:12 ruault kernel: Uniform CD-ROM driver Revision: 3.20 > > Feb 12 19:37:12 ruault kernel: hdd: ATAPI 32X DVD-ROM DVD-R CD-R/RW > > drive, 2048kB Cache, UDMA(33) > sudo /sbin/hdparm -i /dev/hdc > /dev/hdc: > DMA modes: sdma0 sdma1 sdma2 mdma0 mdma1 *mdma2
Try /sbin/hdparm -d /dev/hdc and see if it returns "using_dma = 1 (on)". I noticed that altough -i says using dma, that -d tells me it really is off.
Folkert van Heusden
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