Bug#883615: Acknowledgement ([CRITICAL] Stretch p-u 9.3 breaks NVidia driver and X.org)

[Julien Aubin]

Hi,

2017-12-06 19:18 GMT+01:00 Andreas Beckmann <anbe at debian.org>:

> On 2017-12-06 18:39, Julien Aubin wrote:
> > Raised issue #883705 as it is actually a libc6 regression (it may affect
> > other apps actually).
>
> I tried to set a title for that bug (it had none), but maybe you can
> describe it even better?
>

The title I've set is :
 libc6: 2.24-11+deb9u2 breaks Nvidia's GLX X module on Pascal GPU

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=883705

>
> Just to verify: if you downgrade libc6 to 2.24-11+deb9u1 everything is
> working properly again?
>

Yup I confirm that if you downgrade all is working properly again.


>
> My guess is that it is not related to the nvidia driver at all (except
> for utilizing a certain code path in glibc), but to your CPU and the
> optimized glibc routines used for it ...
>
> So try touching the file /etc/ld.so.nohwcap - hopefully glibc will stop
> using any optimized code for your cpu. If this works (and the glx module
> works agian afterwards), we are moving into the right direction.
>

I guess the same, some optimization introduced in the makefile which
triggers a different compilation path.

>
>
> Andreas
>
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