When I first installed Mint I was really impressed. It zoomed along at an impressive speed.
Now it is not so good.
Mint is a bit slower than Windows to boot (I can live with that) but, once booted, it is SOMETIMES (often) painfully slow.
For example, I just went to open Terminal to run the "top" command and it took 6 seconds for Mint to respond to the initial mouse click, then a further 12 seconds for the terminal window to open. "Top" didn't show anything out of the ordinary.
If I'm running Thunderbird, Firefox and, say, KeePassXC, the machine is so slow it's impossible to use (type a 12 digit word and it takes 8 seconds to appear on the screen. The whole time I can hear the HDD working hard.
It was suggested by others that it's the HDD, but it tests ok. I've also booted into Win10 and that works perfectly - it's blisteringly fast in comparison. Win10 also reports that the HDD is fine.
If, when Mint is really bad, I shut down and reboot then it's usually fine, provided I only use one program/app. The problem definitely seems to be worse when I'm running multiple programs/apps.
What tests can I do to try to fix this?
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System: Host: Sales Kernel: 4.15.0-151-generic x86_64 bits: 64 compiler: gcc v: 7.5.0
Desktop: Cinnamon 4.2.4 wm: muffin dm: LightDM Distro: Linux Mint 19.2 Tina
base: Ubuntu 18.04 bionic
Machine: Type: Desktop System: Dell product: OptiPlex 780 v: N/A serial: <filter> Chassis:
type: 15 serial: <filter>
Mobo: Dell model: 03NVJ6 v: A00 serial: <filter> BIOS: Dell v: A15 date: 08/06/2013
CPU: Topology: Dual Core model: Intel Core2 Duo E8400 bits: 64 type: MCP arch: Penryn rev: A
L2 cache: 6144 KiB
flags: lm nx pae sse sse2 sse3 sse4_1 ssse3 vmx bogomips: 11968
Speed: 2232 MHz min/max: N/A Core speeds (MHz): 1: 2232 2: 1995
Graphics: Device-1: Intel 4 Series Integrated Graphics vendor: Dell driver: i915 v: kernel
bus ID: 00:02.0 chip ID: 8086:2e12
Display: x11 server: X.Org 1.19.6 driver: modesetting unloaded: fbdev,vesa
resolution: 1600x900~60Hz
OpenGL: renderer: llvmpipe (LLVM 10.0.0 128 bits) v: 3.3 Mesa 20.0.8 compat-v: 3.1
direct render: Yes
Audio: Device-1: Intel 82801JD/DO HD Audio vendor: Dell driver: snd_hda_intel v: kernel
bus ID: 00:1b.0 chip ID: 8086:3a6e
Sound Server: ALSA v: k4.15.0-151-generic
Network: Device-1: Intel 82567LM-3 Gigabit Network vendor: Dell driver: e1000e v: 3.2.6-k
port: ece0 bus ID: 00:19.0 chip ID: 8086:10de
IF: enp0s25 state: up speed: 100 Mbps duplex: full mac: <filter>
Drives: Local Storage: total: 931.51 GiB used: 81.01 GiB (8.7%)
ID-1: /dev/sda vendor: Seagate model: ST1000DM010-2EP102 size: 931.51 GiB
speed: 3.0 Gb/s serial: <filter>
Partition: ID-1: / size: 456.79 GiB used: 81.01 GiB (17.7%) fs: ext4 dev: /dev/sda5
Sensors: System Temperatures: cpu: 41.0 C mobo: N/A
Fan Speeds (RPM): N/A
Repos: Active apt repos in: /etc/apt/sources.list.d/official-package-repositories.list
1: deb http: //www.mirrorservice.org/sites/packages.linuxmint.com/packages tina main upstream import backport
2: deb http: //archive.ubuntu.com/ubuntu bionic main restricted universe multiverse
3: deb http: //archive.ubuntu.com/ubuntu bionic-updates main restricted universe multiverse
4: deb http: //archive.ubuntu.com/ubuntu bionic-backports main restricted universe multiverse
5: deb http: //security.ubuntu.com/ubuntu/ bionic-security main restricted universe multiverse
6: deb http: //archive.canonical.com/ubuntu/ bionic partner
Info: Processes: 181 Uptime: 1h 31m Memory: 3.69 GiB used: 2.33 GiB (63.1%) Init: systemd
v: 237 runlevel: 5 Compilers: gcc: 7.5.0 alt: 7 Client: Unknown python3.6 client
inxi: 3.0.32
