[Thinlinc-technical] Kernel panic with Ubuntu 12.10 and mounting/unmounting USB drives with thinlinc

[Jens Langner]

Hi Tobias,

thanks for the hint. I will try it tomorrow at work. I doubt, however, that this will help since we are not using any encryption settings internally here in /etc/ldap.conf, so I doubt that the reason for the crashes are due to try to use TLSv1.2. And that the crash happens within libc doesn't make debugging any easier, unfortunately.

best regards,
jens

Am 10.07.2013 um 17:36 schrieb Tobias Oetiker <tobi at oetiker.ch>:

> Jens,
> 
> Today Jens Langner wrote:
> 
> > Hi Peter,
> >
> > For the client we are using the latest 'thinstation' version
> > available at the corresponding git. In fact it uses kernel 3.9.4
> > (32bit). Our ThinLinc server uses currently 3.5.0-36-generic
> > (64bit) and the problem is still present. Our ThinLinc client on
> > our thinstation is the latest 4.1.0 rev 3996. And do you really
> > think that the client OS version really depends on seeing the
> > server side crashing when doing a tl-mount-localdrives? I highly
> > doubt that. IMHO this seems to be a kernel bug in 3.5.0.
> > Unfortunately I can't test the latest 13.04 ubuntu version with
> > kernel 3.8.0 because that comes with another bug that strikes us
> > as ldap authentication (nss_ldap) doesn't work and thus thinlinc
> > won't work with 13.04 as well. This however might not be a
> > general problem for everyone but related to our quite large ldap
> > directory here which might trigger the problem somehow.
> >
> > And we are using 12.10 because we always need/want the latest
> > tools to be available to us and not having to wait 2 years for a
> > new LTS release to appear. That's why we also would love to
> > upgrade to 13.04 but unfortunately the mentioned LDAP problem
> > currently prevents us from doing so (see here form more:
> > https://bugs.launchpad.net/ubuntu/+source/libnss-ldap/+bug/1185699)
> 
> just a wild guess, but in connection with opennssl 1.0.1 and ldap
> there seem to be issue with TLSv1.2 (just spent some quality time
> with our omnios server. Have you tried
> 
> /etc/ldap/ldap.conf
> 
> TLS_CIPHER_SUITE TLSv1:!aNULL:!eNULL:!EXPORT
> 
> cheers
> tobi



-- 
Dr. Jens Langner
Helmholtz-Zentrum Dresden-Rossendorf
Institute of Radiopharmaceutical Cancer Research
Department of Positron Emission Tomography
POB 51 01 19, 01314 Dresden, Germany
http://www.hzdr.de/ | +49 351 260 2757

Vorstand: Prof. Dr. Dr. h. c. Roland Sauerbrey
Prof. Dr. Dr. h. c. Peter Joehnk
VR 1693 beim Amtsgericht Dresden


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