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  1. Bug #916677
  2. Comment #43

Comment 43 for bug 916677

Revision history for this message
Paladin24 (happyworm24) wrote : Re: Boot problem with VIA VT6415 PATA IDE Host Controller and PATA CD/DVD-ROM (checked on ASRock 990fx and 890fx motherboards)

Thank you. I am not pro in this questions, but now we know that this solution helps to solve the problem! Thank you for your answer.
Btw, I have found some information about libata.dma here http://www.kernel.org/doc/Documentation/kernel-parameters.txt:
libata.dma= [LIBATA] DMA control
   libata.dma=0 Disable all PATA and SATA DMA
   libata.dma=1 PATA and SATA Disk DMA only
   libata.dma=2 ATAPI (CDROM) DMA only
   libata.dma=4 Compact Flash DMA only
   Combinations also work, so libata.dma=3 enables DMA
   for disks and CDROMs, but not CFs.

Thus this parameter enables DMA on only on disks, not CD/DVD rom.
I have writen to VIA support team about this problem, hope they will answer on e-mail or in https://bugzilla.kernel.org/show_bug.cgi?id=44111