Ubuntu 19.10 boot hang

Does the system have a make and model?

If you boot an older kernel, is it OK?

Hi Andrew ....... hwinfo --short .... as folows
ElpaTech (ElpaTech Ltd., Number 4, 33 London Street, Andover
SP10 2NU) Performance PC ­ 240GB, SSD, Z370 Motherboard, 8GB RAM, Core i3 8100, + DV, +Toshiba HDD Backup Separate.
cpu: Intel(R) Core(TM) i3-8100 CPU @ 3.60 GHz, x4; 1675 MHz, 1475 MHz, 1428 MHz, 1188 MHz
Kbd: AT Translated Set 2 keyboard
Mouse: ImExPS/2 Logitech Explorer
Printer: HP Envy 5000 series
graphics card: Intel 8th Gen Core Processor Gausian mixture Model.
Sound: Intel 200 Series PCH HD Audio
Storage: Intel 200 Series PCH SATA controller [AHCI mode]
Network: Intel Ethernet connection (2) I219-V
Ethernet Network Interface
Loopback Network Interface
disk: /dev/sda1 A SU650
/dev/sda1/ Partion
/dev/sda2/ Partion
cdrom: /dev/sr0 HL-DT-DVDRAM GH24NSC0
bios: BIOS
etc... etc.. I could send screen shots etc.

Remaining hwinfo as follows:
usb controller:
                       Intel 200 Series/Z370 Chipset Family USB 3.0 xHCI Controller
bios:
                       BIOS
bridge:
                       Intel Z370 Chipset LPC/eSPI Controller
                       Intel 8th Gen Core 4-core Desktop Processor Host Bridge/DRAM Registers [Coffee Lake S]
hub:
                       Linux Foundation 2.0 root hub
                       Linux Foundation 3.0 root hub
memory:
                       Main Memory
unknown:
                       FPU
                       DMA controller
                       PIC
                       Keyboard controller
                       Intel 200 Series/Z370 Chipset Family Power Management Controller
                       Intel 200 Series PCH CSME HECI #1
                       Intel 200 Series PCH Thermal Subsystem
                       Intel 200 Series/Z370 Chipset Family SMBus Controller
                       Microsoft LifeCam NX-3000 (UVC-compliant)
                       HP ENVY 5000 series

If I remove nomodeset, the system crashes at next boot.
It used to work well with 19.04 and works with 19.10 after this convoluted boot.

Could try a newer kernel. May help.
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.4-rc5/

It says I am running:
Linux version 5.3.0-19-generic (buildd@lgw01-amd64-053) (gcc version 9.2.1 20191008 (Ubuntu 9.2.1-9ubuntu2)) #20-Ubuntu SMP Fri Oct 18 09:04:39 UTC 2019

Maybe 5.4 is more suitable for your system

Well don't they recommend that in updates

Possibly but you can jump ahead if needed

Hi Andrew. I have downloaded and activated:
Linux 5.4.0-050400rc6 ; but it comes up as Linux 5.4.0-050400rc6-lowlatency after going through the the same convoluted procedure. The GRUB file still contains ....nomodeset . I will now try it without that.

OK Andrew that works pretty quick - like flash. Hooragh. But why is it running lowlatency, should I set generic as default and how. Thank you for help so far. PS if you can answer this I will make a donation to Canonical for 19.10.

Thank you Andrew, brilliant. :-)
Ref's for future stupid users like me (but we can't know everything):
https://www.tecmint.com/upgrade-kernel-in-ubuntu/
https://www.linuxadminqa.com/how-to-configure-grub2-boot-loader-settings-in-ubuntu/
http://www.gnu.org/software/grub/manual/grub/grub.html#Simple-configuration

Thanks actionparsnip, that solved my question.

Changed to generic using method outlined:
https://unix.stackexchange.com/questions/198003/set-default-kernel-in-grub