Re: 100% repeatable way to send firewire out to lunch permanently on 2.6.8.1

[Stefan Richter <stefanr@s5r6.in-berlin.de>]

Christian Iversen wrote to linux1394-devel:
> On Sunday 24 October 2004 19:22, Dmitry Torokhov wrote:
>> On Sunday 24 October 2004 10:22 am, James Bottomley wrote:
>>> The trace doesn't show any error handler activity at all.  Are there no
>>> messages in the log about offlining the device?  If not, it sounds like
>>> there's a problem somewhere in the firewire system.
>> 
>> The thing is that the hang is happening only with CD/DVD devices (sr_mod)
>> and not with hard drives (sd_mod) and as far as I can tell SBP2 does not
>> differentiate betweeh an HD and a CD so I think there is something going
>> on in sr_mod code.
> 
> I can't see the start of the thread, but I have a very similar problem with 
> external CD-ROMs in usb-2.0 cases. Whenever I unplug them, they kill the 
> entire system (usb subsystem at first, then the whole kernel locks up).
...
> This is tested on 3 different controllers, 2 different motherboards and 3
> different kernels. 2.6.7-2.6.9 all have this problem. 2.6.5-rc3 works like
> a charm, and I haven't tested 2.6.6.

I have 2 different SBP-2 CD-RW drives, 3 different SBP-2 harddrives, and
use an USB memory stick occasionally. After the last kernel update (from
2.6.6-rc3 to 2.6.8.1) I noticed problems with device removals concerning
/dev/scd? for the first time. I did not use the drives very extensively
under the former kernel so I am not sure whether that worked fine. One
thing is however certain: There is no hassle with sd devices.

There were some more reports about the CD/DVD removal problems with
recent 2.6 kernels on linux1394-user/-devel, but nothing similar about
harddisks.
-- 
Stefan Richter
-=====-=-=-- =-=- ==---
http://arcgraph.de/sr/