Red Hat Bugzilla – Bug 59276
DS10, ES40, ES45 can't enable DMA on IDE CD
Last modified: 2007-04-18 12:39:44 EDT
Description of Problem:
Can't enable DMA on CD-ROM (IDE) on AlphaServer DS10, AlphaServer DS10L,
AlphaServer ES40, AlphaServer ES45.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. during boot, note ALi15x3: simplex device messages
2. after booting, try hdparm -d 1 /dev/hda (assuming CD is hda)
3. hdparm fails to set dma
Can't turn on DMA
DMA turned on
This is caused by the lack of the ali15x3 driver in the kernel. The generic PCI
IDA dma driver does not deal with the ALi1543 on these systems correctly. The
correct driver is needed.
To fix - enable "ALI M15x3 chipset support" under "IDE, ATI, and ATAPI Block
devices" in the kernel configuration.
*** Bug 58719 has been marked as a duplicate of this bug. ***
Fixed for final (woking)