hi
With the VIA IDE chipset listed below, DMA is off by default on my DVD-ROM and
CD burner attached to the secondary channel (as hd[cd]) on recent kernels.
DMA works fine after an "echo using_dma:1 > /proc/ide/hd[cd]/settings
The .config is attached. This has been tested up to 2.4.20-rc1. I haven't
tried .20 final, as I couldn't find anything related in the changelog.
roy
(from lspci -vvvvv)
00:11.1 IDE interface: VIA Technologies, Inc. Bus Master IDE (rev 06) (prog-if
8a [Master SecP PriP])
Subsystem: Asustek Computer, Inc.: Unknown device 808c
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
Status: Cap+ 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 32
Interrupt: pin A routed to IRQ 0
Region 4: I/O ports at 8000 [size=16]
Capabilities: [c0] Power Management version 2
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME-
--
Roy Sigurd Karlsbakk, Datavaktmester
ProntoTV AS - http://www.pronto.tv/
Tel: +47 9801 3356
Computers are like air conditioners.
They stop working when you open Windows.