[ltp] Re: hotswap ultrabay and dma (for IBM Thinkpad T41p)

[Greg Meyer]

On Monday 24 January 2005 05:14 am, Paul Ionescu wrote:
> On Mon, 24 Jan 2005 09:57:41 +0100, Nils wrote:
> > Hi,
> > has anybody an idea to hotswap dvd-rom and battery on a T41p ? I found
> > the hotswap utility =A0(http://users.ox.ac.uk/~univ1377/). It is working
> > fine. I can swap dvd-rom and battery, but I loose the dma modus after t=
he
> > first swap cycle.
> > Only booting with dma support is working. I also found some comments in
> > the list, but no solution. The idectl-utility and hdparm (-U / -R) is n=
ot
> > working on my system. Then I get the message: HDIO_UNREGISTER_HWIF
> > failed. I hope that somebody has an idea to patch the kernel or how to
> > use the idectl-utility or hdparm (-U / -R) with correct parameters.
>
> I have been searching for long time to activate dma after swapping, but no
> success whatsoever.
> Some said that is a problem in IDE driver.
> I still wait for Alan Cox to post some ide hot-plug device patches which
> would enable this.

Same here, still looking

=2D-=20
/g