Unable to boot in low latency after kernel upgrade - Ubuntu 22.04.2

I'm on a new machine a couple of weeks old: Lenovo IdeaPad Gaming 3 15IAH7 Type 82S9 | 12th Gen Intel® Core™ i5-12450H × 12 | NVIDIA Corporation GA107M [GeForce RTX 3050 Mobile].

I configured it to dual boot Windows 11 and Ubuntu 22.04. Then, I used the Ubuntu Studio Installer to install all Ubuntu Studio components, including the low latency kernel. Everything was working as expected, even though I hadn't installed the NVIDIA driver and was using the default open-source one instead.

A few days ago, I was prompted to upgrade some stuff (I think it was Core 22) and I noticed that the kernel was upgraded. As a result, I haven't been able to boot with "Ubuntu (lowlatency)" since. The screen goes black after the boot dialog.

I can still boot with "Ubuntu (generic)" and with "Windows 11", though.

What I've tried, so far:

• I installed the NVIDIA driver ... (proprietary, tested);
• I booted into Ubuntu recovery mode and tried updating the grub bootloader;

While in recovery mode, I was able to check the following information (which didn't change with the update attempt):

• generic 5.19.0-46
• lowlatency 5.15.0-76

Is anyone having the same issue? And how to solve it? I appreciate all help.

I had a similar problem: no matter what I did, generic kernel was always used, no matter what Grub options I modified, including stuff that worked for older Ubuntu versions.

I found the answer here. It's a matter of setting GRUB_FLAVOUR_ORDER with the desired "kernel flavor" in /etc/default/grub, update Grub and reboot. Something like this (with sudo):

$ echo 'GRUB_FLAVOUR_ORDER="lowlatency" | tee -a /etc/default/grub
$ update-grub
$ reboot

Hope it helps.