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lister171254
October 24th, 2016, 11:12 AM
I have a Laptop with Intel Haswell and Nvidia 970.
All worked fine on 16.04, but after upgrading to 10.10, I get the following weird behaviour.

After booting, I get the Login screen and I can login in ok.
Everything looks fine, but after a few seconds the screen begins to flash intermittently
I can see the same behaviour (intermittent flashing screen) when I go to a text terminal (Ctrl/F1)
Stopping GDM makes no difference to the terminal
I can still enter commands, bit the screen flashed intermittently

Booting into rescue/low graph mode hangs
Booting into rescue mode and dropping to a prompt doesn't work

Not booting with the latest Kernel 4.8.0-27-generic and booting with 4.4.0-46-generic works perfect.

Thanks

Bashing-om
October 24th, 2016, 03:57 PM
lister171254; Hello;

My thought .. proprietary graphic's driver ?... the driver built against the 4.4.0-46 kernel .

If there is a proprietary driver at play here; try and purge the driver and re-install booted to terminal from the 4.8.0-27 kernel .



maybe yes



maybe not so yes

lister171254
October 25th, 2016, 01:33 AM
Thanks. That's the first thing I checked. I'm using the nouveau drivers.

I've been using Ubuntu with nvidia cards for a long time and there were more often than not graphic issues with a new release, but I have never had issues using the text terminal.

Bashing-om
October 25th, 2016, 02:14 AM
lister171254; 1st for me also .

When you remove 'quiet splash' in grub's kernel boot line ( e key @ grub boot menu ) and boot, do you see any errors ?

anything relevant :


journalctl -b -0 ##shows messages from the current boot,
journalctl -b -1 ##from the previous boot


any instructions we can read



better than nothing

lister171254
October 25th, 2016, 05:03 AM
Have attached two files; works & fails

If you search for nvidia in both files, the 4.4 kernel enables the card, the 4.8 doesn't find files and aborts.

Thanks
Leo

Bashing-om
October 25th, 2016, 07:23 PM
lister171254; Hey ...

Need an alternate means to access the files :
I run a real tight install, and a means to untar is not installed:


sysop@1404mini:~$ df -h
Filesystem Size Used Avail Use% Mounted on
udev 1.9G 4.0K 1.9G 1% /dev
tmpfs 396M 776K 395M 1% /run
/dev/sda1 4.7G 2.2G 2.3G 49% /
none 4.0K 0 4.0K 0% /sys/fs/cgroup
tmpfs 2.0G 12K 2.0G 1% /tmp
none 5.0M 0 5.0M 0% /run/lock
none 2.0G 22M 2.0G 2% /run/shm
none 100M 4.0K 100M 1% /run/user
/dev/sda2 9.5G 731M 8.3G 8% /home
/dev/sda8 4.7G 706M 3.8G 16% /var
sysop@1404mini:~$

I do not have the room for anything that I do not have to have ( and for what I might need to install in the future) .



we can find a way

lister171254
October 26th, 2016, 07:14 AM
Haven't found a way to upload the individual text files. Trying to open them in Nautilus indicates that they are executables (no excutable bits set though), so I cannot upload the text files
Output of 'file' shows
fails.txt: UTF-8 Unicode text, with very long lines

Bashing-om
October 26th, 2016, 10:51 PM
lister171254l Hey, hey .

Here is an alternate that should work to xfer the logs .


journalctl -b -0 | nc termbin.com 9999
journalctl -b -1 | nc termbin.com 9999

where the result is a URL back in terminal, pass that link back here .

We see what the system has to say .



we can do that

lister171254
October 27th, 2016, 02:38 AM
Thanks for trying to help, but I don't allow access to my system from the outside.

Given that the same behavior also happens when I boot of the 16.10 LivedCD I've reported this on Launchpad https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1637032.
Thanks again,
Leo

Bashing-om
October 27th, 2016, 03:20 AM
lister171254; Good deal;

Let's see what the big boys have to say .



one of those times