Re: Media autochanger driver changed behavior.

[James Bottomley <James.Bottomley@HansenPartnership.com>]

On Wed, 2008-07-09 at 23:56 +0200, Jesper Krogh wrote:
> James Bottomley wrote:
> > On Wed, 2008-07-09 at 22:51 +0200, Jesper Krogh wrote:
> >> Hi.
> >>
> >> Upgrading the OS from an quite old kernel to a newer (2.6.24) changed
> >> the behavior of the "ch" driver. Now it does a inventory to the changer
> >> on load. This command makes the barcode-reader scan the entire library
> >> at driver load time.
> > 
> > Do I take it from this that your old kernel simply didn't auto load the
> > ch driver?  or that something has changed in the way the driver now
> > works?
> 
> It sure did load the driver and it worked just fine. It just didnt make 
> the library unit force scan the barcodes. (the library do that on bootup 
> by itself, but it can be forced with mtx over the changer device).
> 
> mtx -f /dev/changer inventory => Force scans barcodes
> mtx -f /dev/changer status => Reads out the barcodes labels and slots
> from the changer device without forcing the library to scan.
> (note I dont know if it is library specific).

OK, so it's not the autoloading code which I thought it might be.

Which is the latest version of the kernel that works? ... that will at
least give me the set of changes to look at.

James


> > I'm afraid ch.c is a bit of an orphan so tracking down the issue,
> > particularly if it's buried way back might take a while (on the brighter
> > side, there haven't been so many commits to the driver, so they can be
> > tested one by one).
> 
> 
>