nvidia 304 and fc23: black screens after updating today

[John Pilkington]

On 12/10/16 00:05, John Pilkington wrote:
> On 11/10/16 21:21, Nicolas Chauvet wrote:
>> 2016-10-11 1:00 GMT+02:00 John Pilkington <J.Pilk at tesco.net>:
>>> This is the same system that had nvidia problems during its fc22 > fc23
>>> upgrade.  That was reported here and solved on 30 June.  Since then
>>> it has
>>> been working well, but after installing the new packages today I get
>>> black
>>> screens with kernels 4.7.3, 4.7.5 and 4.7.6
>>>
>>> 'dnf downgrade xorg-x11-drv-nvidia-304xx --allowerasing' apparently
>>> completed but then akmods-shutdown errored.  After re-upgrading,
>>> akmods-shutdown completed, and the nvidia flash screen flashes, but
>>> then all
>>> goes black again, for all installed kernels.  I'm using tty2.
>>
>> We have seen such error and have moved the update back into
>> updates-testing for now.
>> Best is to debug using ssh remotly we'd like to have a full
>> nvidia-bug-report.sh to send to nvidia support forum
>>
>> Hopefully there will be a new updated package from nvidia, we will
>> need testers at that time..
>>
>> Thx for your report.
>>
>>
>>
> I have been trying to get nouveau working, so far without success.  But
> I've also looked at the builds from scrpms, in which dnf reports
> conflicts between the libvdpau_nvidia.so and .so.1 files from the 304
> and 340 lib packages, which are both required.  ISTR something similar
> in atrpms long ago.
>
I have just posted to the kde fedora list: dmesg shows plasmashell 
segfault in nouveau_dri.so