problem of new Ubuntu with old computers

[UBUminJ]

I have two old computers:
an Dell Inspiron 530s, Intel Core 2 Duo CPU E8500, Intel G33 graphics and
an Dell XPS 8900, 6th Gen Intel Core i7-6700 Skylake, NVIDIA® GeForce®GTX 745 4GB DDR3

Both run well with Ubuntu 18.04, both became very/extremely sluggish after installation of 22.04.
The Inspiron is back to 18.04 with extended service (Ubuntu Pro). The other one waits for a solution of the problem.

What could be the reason?

Thank you.

[guiverc]

I don't know, but I'll give a comment.

You mention 18.04 works well; but didn't provide specifics (Server? Desktop? which kernel stack were you using? GA? (4.15) or HWE? (5.4) as that can make a huge difference; esp. in relation to how much newer the newer release stack will be).

You also say 22.04; but again no product/kernel stack details (GA = 5.15, HWE = 6.8) ... For older hardware, I often find the older GA kernel stack is best; so is that what you were using? or had you used ISO/media that installed the newer HWE kernel stack (meaning much newer software for your older hardware).

I do some Quality Assurance testing using various Core2 era devices (a quick scan down my list and I counted 11 Core2 CPUs), which is the reason I'm mentioning kernel stack...

Older hardware can often perform better with the older kernel, just as newer hardware often performs better with the newer linux kernel option. LTS release give us choice.

https://wiki.ubuntu.com/Kernel/LTSEnablementStack

[Rubi1200]

For the Dell XPS 8900, I would recommend the following:

1. try a lighter version like Xubuntu or Lubuntu
2. try something like Bodhi Linux, which should run well on older hardware

[yancek]

As mentioned in the above posts, you are very short on details and answering the questions asked above would go a long way toward getting assistance. Also, you might define old a little better such as the manufacture date or purchase date. 4GB RAM on the second computer is minimal for a full, new Ubuntu install.

[oldfred]

I found Kubuntu worked on my very old laptop where I could not even install Ubuntu. Server installed, but not desktop. Kubuntu is more middle weight flavor.

https://ubuntu.com/download/flavours
Light weight flavors:
Lubuntu, Xubuntu, Ubuntu MATE, Budgie
Flavors of Ubuntu only come with three years of supported life (five years applies to Ubuntu Desktop, Ubuntu Server but not flavors)

[UBUminJ]

Thank you.
I didn't know what information is necessary.

A few more details, as far as I know and understand.

The Dell Inspiron is from 2006 or 2007. It runs Ubuntu Desktop 18.04.1 without problems.
It is subscribed to Ubuntu Pro.
The 22.04 was desktop, I don't know which Kernel version it was. I installed it a few days after it came out.

Perhaps this helps for the Ubuntu-running Inspiron:

inxi -FxG
System: Kernel: 5.4.0-196-generic x86_64 bits: 64 gcc: 7.5.0
Desktop: Gnome 3.28.4 (Gtk 3.22.30-1ubuntu4)
Distro: Ubuntu 18.04.6 LTS
Machine: Device: desktop System: Dell product: Inspiron 530s serial: N/A
BIOS: Dell v: 1.0.15 date: 06/20/2008
CPU: Single core Intel Core2 Duo E8500 (-UP-)
arch: Penryn rev.6 cache: 6144 KB

flags: (lm nx sse sse2 sse3 sse4_1 ssse3 vmx) bmips: 6317 speed/max: 1995/3164 MHz
Graphics: Card: Intel 82G33/G31 Express Integrated Graphics Controller
bus-ID: 00:02.0
Display Server: x11 (X.Org 1.20.8 ) driver: i915
Resolution: 1920x1080@60.00hz
OpenGL: renderer: Mesa DRI Intel G33
version: 1.4 Mesa 20.0.8 Direct Render: Yes
Audio: Card Intel 82801I (ICH9 Family) HD Audio Controller
driver: snd_hda_intel bus-ID: 00:1b.0
Sound: Advanced Linux Sound Architecture v: k5.4.0-196-generic
Network: Card: Intel 82562V-2 10/100 Network Connection
driver: e1000e v: 3.2.6-k port: fe00 bus-ID: 00:19.0
IF: enp0s25 state: up speed: 100 Mbps duplex: full
mac: 00:21:9b:12:a0:27
Drives: HDD Total Size: 500.1GB (28.0% used)
ID-1: /dev/sda model: Samsung_SSD_860 size: 500.1GB temp: 0C
Partition: ID-1: / size: 458G used: 131G (31%) fs: ext4 dev: /dev/sda1
RAID: No RAID devices: /proc/mdstat, md_mod kernel module present
Sensors: System Temperatures: cpu: 46.0C mobo: N/A
Fan Speeds (in rpm): cpu: N/A
Info: Processes: 296 Uptime: 45 min Memory: 1914.2/3909.0MB
Init: systemd runlevel: 5 Gcc sys: N/A
Client: Shell (bash 4.4.201) inxi: 2.3.56

[UBUminJ]

Regarding the Dell XPS 8900 (2016).

The 22.04.LTS was also the desktop version, I don't know which Kernel version it was. I installed it a few days after it came out.
In the beginning it worked (not well but worked), after a few updates, something broke and I couldn't login anymore.

I tried to install 24.04.LTS, not possible, a number of systemd errors.
I could install Nitrux just a few days ago (which doesnT use systemd) but the same picture as in the beginning of 22.04 - sluggish behavior. Always a delay between moving the mouse and seeing the move on the display or opening a folder and seeing the folder opened.

Perhaps, it could be the presence of Wayland behind all the problems.
It is just a guess as I now find a number of posts (from that time) where people switched from Wayland back to X11.
https://www.reddit.com/r/linux/comme...nd_because_of/