21st February 2017, 16:42
PS -- As i typed the preceding log [all from confused tired memory, i hope it's all correct], i briefly wondered if maybe i should, still in tty, attempt to repeat the 4.9.9 downloads & installs per that linked page, then try again to fully remove, the proper way. However, i then remembered the Ubuntu page cautions that:
...& curses; as per my step #1, i changed back from Nouveau to the latest Nvidia driver [& still can't tell if the attempt to use the Intel driver did work or not]. Back when i did first install 4.9.9 on 14Feb, i was at that stage already using Nouveau, so there was no conflict with 4.9.9. Now in hindsight, i think tonight i first should have removed 4.9.9 [the proper way] whilst i was still using the Nouveau driver, & only then attempted the gpu driver change... after which i could have gone for 4.8 HWE [that now looks to be a looooooooooooooooooong way away].
It feels like i am snookered.
Quote:Preparing to install an upstream kernel
First, if one is using select proprietary or out-of-tree modules (ex. vitualbox, nvidia, fglrx, bcmwl, etc.) unless there is an extra package available for the version you are testing, you will need to uninstall the module first, in order to test the mainline kernel. If you do not uninstall these modules first, then the upstream kernel more than likely will not boot.
...& curses; as per my step #1, i changed back from Nouveau to the latest Nvidia driver [& still can't tell if the attempt to use the Intel driver did work or not]. Back when i did first install 4.9.9 on 14Feb, i was at that stage already using Nouveau, so there was no conflict with 4.9.9. Now in hindsight, i think tonight i first should have removed 4.9.9 [the proper way] whilst i was still using the Nouveau driver, & only then attempted the gpu driver change... after which i could have gone for 4.8 HWE [that now looks to be a looooooooooooooooooong way away].
It feels like i am snookered.