Flash memory

[Nils Philippsen]

On Wed, 2004-04-21 at 16:20, Fulko.Hew at sita.aero wrote:
> Nils Philippsen <nphilipp at redhat.com>@redhat.com on 04/21/2004 09:36:48 AM
> replied:
> 
> 
> > On Wed, 2004-04-21 at 15:47, Fulko.Hew at sita.aero wrote:
> > >
> > > > Something has happened between FC1 rawhide and FC2t3. My USB
> flashcard
> > > > reader is no longer allowing me to access the flash card I use in my
> > > > Yopy PDA - it's not even registering using sg_scan or cdrecord
> --scanbus
> > > > (as it used to).
> > >
> > > My failure is related, but not similar
> > > A few days ago I seem to have lost /dev/sda0 and /dev/sda1 all
> together.
> > > So I can't do a thing now w.r.t FLASH USB.
> >
> > Works for me (again) now that I have recreated the device files:
> >
> > cd /dev
> > ./MAKEDEV sda
> > ./MAKEDEV sda1
> 
> 
> Thank you.  That has brought them back.
> Now the question would be... "What made them dissapear?"

I guess something of hotplug, udev, kudzu with the last one the primary
suspect as it worked after upgrading it ;-).

> 
> > Don't know what you're talking about re "sda0" -- I don't know such a
> > thing (there's sda and sda1).
> 
> Sorry, 'sda0' was a typo, I had intended to write "/dev/sda and /dev/sda1".
> 
> 
> > > ... snip ...
> > >
> > > > /dev/sda0 points to /dev/video1 (my webcam) though this has never
> been a
> > > > factor before. All the cables are plugged in (the PC is charging my
> Yopy
> > > > as I type this).
> > >
> > > Also, my USB hotplug doesn't detect any USB devices if I plug them
> >
> > Any output from the following command (as root)?
> >
> > rpm -V dev | fgrep missing
> 
> Yes,  I have the following:
> 
> missing    /dev/dri/card1
> missing    /dev/dri/card2
> missing    /dev/dri/card3

Shouldn't cause harm here though you might want to recreate them anyway.

> BTW. I have also disable SELinux (based on the original instruction that I
> do not recall at the moment) since 'day 2' of testing 'test 2' because of
> all of its issues, and I have never re-enabled it.

This would be the first instance I knew of a bug only seen with selinux
disabled ;-).

> > > in _after_ the system is booted.  No one has seems to be able to come
> > > to my aid on this issue, although I have submitted a bugzilla on it.
> >
> > There seems to be the misconception that bugzilla was a support tool
> > ;-). It is a bug tracker so developers don't lose track of the bugs and
> > they may get fixed eventually.
> 
> 
> No, I never expected bugzilla to be a support tool, but I did expect the
> issue
> to be acknowleged.  However I would have thought that something like a
> existing
> USB hotplug issue might have taken precedence over new features like
> SELinux,
> or am I the only person where hotplug doesn't work any more :-(
> (btw. It still works on this hardware if I plug my RH9 disk back in.)

Whether something gets acknowledged or acted upon is the decision of the
developer in question. Given that SELinux is something we want to have
for future versions of RHEL as well, our priorities might be slightly
different than yours ;-).

> > For help your best address is here or
> > maybe fedora-devel-list (or fedora-list once FC2 is final).
> 
> I have, and gotten no _useful_ responses todate
> (other than 'hotplug is in the kernel')
> that might lead me in any direction that allows me to help to debug
> the code.  I am trying to help RedHat on this bug/issue.  Heck i'll even
> submit a patch, but so far far I haven't found any documentation or
> help, on how this subsystem is supposed to work.
> The linux-usb web page only goes as far as kernel 2.4.

Agreed, the lack of documentation in this one and other areas is not
exactly desirable. 

Nils
-- 
     Nils Philippsen    /    Red Hat    /    nphilipp at redhat.com
"They that can give up essential liberty to obtain a little temporary
 safety deserve neither liberty nor safety."     -- B. Franklin, 1759
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