Ciro Santilli @cirosantilli 35

Ciro Santilli 35  Updated 2025-04-18  +Created 1970-01-01

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They've been trying to get it to work forever, and it's beeen buggy forever:

Became the default on Ubuntu 21.04: www.omgubuntu.co.uk/2021/01/ubuntu-21-04-will-use-wayland-by-default

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Monitors by

Ciro Santilli 35  Updated 2025-04-18  +Created 1970-01-01

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Lenovo ThinkPad P14s gen4 amd by

Ciro Santilli 35  Updated 2025-04-18  +Created 1970-01-01

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Bought: November 2023 during Black Friday sale for £1,323.00 to be Ciro Santilli's main personal laptop.

Six years after, and we are 2x on every key spec (except processor Hz ;-) at about 1/2 the price and 1/2 the weight (though smaller 14" screen for greater portability), so not bad! Customized to max out each hardware spec:

Specs:

Processor: AMD Ryzen™ 7 PRO 7840U Processor (3.30 GHz up to 5.10 GHz)
Operating System: No Operating Systemselected upgrade
Operating System Language: No Operating System Languageselected upgrade
Microsoft Productivity Software: None
Memory: 64 GB LPDDR5X-6400MHz (Soldered)selected upgrade. Specs at: www.lenovo.com/gb/en/p/accessories-and-software/memory-and-storage/memory-and-storage-hard-drives/4xb1d04758 quotes "64 Gbps", i.e. 8 GB/s. dd count=1M if=/dev/zero of=tmp gives only 255 MB/s however.
Solid State Drive: 2 TB SSD M.2 2280 PCIe Gen4 Performance TLC Opalselected upgrade
Display: 14" WUXGA (1920 x 1200), IPS, Anti-Glare, Touch, 45%NTSC, 300 nits, 60Hz
Graphic Card: Integrated Graphics
The Ubuntu 23.10 "About system GUI describes its graphics as: Radeon 780M Graphics × 16, which e.g. www.techpowerup.com/gpu-specs/radeon-780m.c4020 documents as running the RDNA 3 microarchitecture.
Camera: 1080P FHD RGB/IR Hybrid with Microphone
Color: Thunder Black
Factory Color Calibration: No Factory Color Calibration
Wireless: Qualcomm Wi-Fi 6E NFA725A 2x2 AX & Bluetooth® 5.1 or above
Integrated Mobile Broadband: No Wireless WAN
Ethernet: Wired Ethernet
Near Field Communication: No NFC
Fingerprint Reader: Fingerprint Reader
Keyboard: Black - English (EU)selected upgrade
Battery: 4 Cell Li-Polymer 52.5Whselected upgrade
Power Cord: 65W USB-C Slim 90% PCC 3pin AC Adapter - UKselected upgrade
Electronic Privacy Filter: No ePrivacy Filter
Adobe Elements: None
Adobe Acrobat: None
Adobe Creative Cloud: None
Security Software: None
Cloud Security Software: No Cloud Security Software
Warranty: 3 Year Courier or Carry-in

Identifiers:

Ethernet MAC address: fc:5c:ee:24:fb:b4
Wi-Fi MAC address: 04:7b:cb:cc:1b:10

Upon arrival:

Weight: 1490 g
Charger weight: 323 g

Firmware according to sudo dmidecode -t bios:

Vendor: LENOVO
Version: R2FET33W (1.13 )
Release Date: 09/08/2023

Buy research:

www.phoronix.com/review/thinkpad-p14s-gen4 says Ubuntu running fine
Intel vs amd: the Intel ones could come with a discrete rtx A500 GPU. GPU likely makes laptop heavier and less power efficient. And both have basically the same benchmark which is crazy:
- www.videocardbenchmark.net/gpu.php?gpu=RTX+A500+Laptop+GPU&id=4649
- www.videocardbenchmark.net/gpu.php?gpu=Radeon+780M&id=4818
So the only downside is not being able to run CUDA.
thought about Yoga or other Ultrabook options, but 2x price at same specs, so nah...

Log:

2024-01-17: firmware update:

Vendor: LENOVO
Version: R2FET36W (1.16 )
Release Date: 10/24/2023

Actually fixed performance mode: askubuntu.com/questions/604720/setting-to-high-performance/1343879#1343879

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X Window System by

Ciro Santilli 35  Updated 2025-04-18  +Created 1970-01-01

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Ad blocking by

Ciro Santilli 35  Updated 2025-04-18  +Created 1970-01-01

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WD Elements 20TB by

Ciro Santilli 35  Updated 2025-04-18  +Created 1970-01-01

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Bought December 2023 for 300 pounds, so 15 pounds / TB. Needs power supply unfrotunately besides USB, the largest one without needing power supply was only 5 TB at the time so not worth it, given that my P14s alreay carriers 2 TB. 10x is a must for the external crap.

www.westerndigital.com/en-gb/products/external-drives/wd-elements-desktop-usb-3-0-hdd?sku=WDBWLG0030HBK-EESN (archive)

Noise: it has a constant pleasant hum, with a not so nice click every 5 seconds or so. Reasonable, but not amazingly incredible.

The size is reasonable, not megaportable, but definitely reasonable.

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WD10EADS-42P6B0 by

Ciro Santilli 35  Updated 2025-04-18  +Created 1970-01-01

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~1TB.

Has a separate power cord, not USB powered. Unbelievable. Edit: actually high ends are still like that as of 2023, e.g. at that time, a the max non-cabled was 5 TB, but top of line was 20 TB.

Disk label: wd1t.

Ubuntu 20.04 gnome-disks benchmark, ext4 partition: 37MB/s.

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P14s cannot dual monitor on Wayland by

Ciro Santilli 35  Updated 2025-04-18  +Created 1970-01-01

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Asked:

On Ubuntu 23.10, under Settings > Displays, Mirror works, but "Join" does not allow to Apply with message:

Changes Cannot be Applied. This could be due to hardware limitations.

Works on X Window System, it is a Wayland bug.

for 3rd monitor

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P14s benchmark by

Ciro Santilli 35  Updated 2025-04-18  +Created 1970-01-01

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Ubuntu 23.10:

glmark2 -b build:duration=3:model=horse

~22K

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P51 hardware by

Ciro Santilli 35  Updated 2025-04-18  +Created 1970-01-01

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lspci

output:

00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v6/7th Gen Core Processor Host Bridge/DRAM Registers (rev 05)
00:01.0 PCI bridge: Intel Corporation 6th-10th Gen Core Processor PCIe Controller (x16) (rev 05)
00:08.0 System peripheral: Intel Corporation Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th/8th Gen Core Processor Gaussian Mixture Model
00:14.0 USB controller: Intel Corporation 100 Series/C230 Series Chipset Family USB 3.0 xHCI Controller (rev 31)
00:14.2 Signal processing controller: Intel Corporation 100 Series/C230 Series Chipset Family Thermal Subsystem (rev 31)
00:15.0 Signal processing controller: Intel Corporation 100 Series/C230 Series Chipset Family Serial IO I2C Controller #0 (rev 31)
00:16.0 Communication controller: Intel Corporation 100 Series/C230 Series Chipset Family MEI Controller #1 (rev 31)
00:17.0 SATA controller: Intel Corporation Q170/Q150/B150/H170/H110/Z170/CM236 Chipset SATA Controller [AHCI Mode] (rev 31)
00:1c.0 PCI bridge: Intel Corporation 100 Series/C230 Series Chipset Family PCI Express Root Port #1 (rev f1)
00:1c.2 PCI bridge: Intel Corporation 100 Series/C230 Series Chipset Family PCI Express Root Port #3 (rev f1)
00:1c.4 PCI bridge: Intel Corporation 100 Series/C230 Series Chipset Family PCI Express Root Port #5 (rev f1)
00:1d.0 PCI bridge: Intel Corporation 100 Series/C230 Series Chipset Family PCI Express Root Port #9 (rev f1)
00:1d.4 PCI bridge: Intel Corporation 100 Series/C230 Series Chipset Family PCI Express Root Port #13 (rev f1)
00:1f.0 ISA bridge: Intel Corporation CM238 Chipset LPC/eSPI Controller (rev 31)
00:1f.2 Memory controller: Intel Corporation 100 Series/C230 Series Chipset Family Power Management Controller (rev 31)
00:1f.3 Audio device: Intel Corporation CM238 HD Audio Controller (rev 31)
00:1f.4 SMBus: Intel Corporation 100 Series/C230 Series Chipset Family SMBus (rev 31)
00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (5) I219-LM (rev 31)
01:00.0 VGA compatible controller: NVIDIA Corporation GM107GLM [Quadro M1200 Mobile] (rev a2)
01:00.1 Audio device: NVIDIA Corporation GM107 High Definition Audio Controller [GeForce 940MX] (rev a1)
04:00.0 Network controller: Intel Corporation Wireless 8265 / 8275 (rev 78)
3e:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd NVMe SSD Controller SM981/PM981/PM983
3f:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS525A PCI Express Card Reader (rev 01)

lspci -t

output:

-[0000:00]-+-00.0
           +-00.2
           +-01.0
           +-02.0
           +-02.1-[01]----00.0
           +-02.2-[02]----00.0
           +-02.4-[03]----00.0
           +-03.0
           +-04.0
           +-04.1-[04-63]--
           +-08.0
           +-08.1-[64]--+-00.0
           |            +-00.1
           |            +-00.2
           |            +-00.3
           |            +-00.4
           |            +-00.5
           |            \-00.6
           +-08.2-[65]--+-00.0
           |            \-00.1
           +-08.3-[66]--+-00.0
           |            +-00.3
           |            +-00.4
           |            \-00.6
           +-14.0
           +-14.3
           +-18.0
           +-18.1
           +-18.2
           +-18.3
           +-18.4
           +-18.5
           +-18.6
           \-18.7

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P51 benchmark by

Ciro Santilli 35  Updated 2025-04-18  +Created 1970-01-01

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Ubuntu 23.10:

glmark2 -b build:duration=3:model=horse

~4.8K

Monero 0.18.3.1 hashrate: 2.6 KH/s

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Dell P2720D by

Ciro Santilli 35  Updated 2025-04-18  +Created 1970-01-01

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27 Inch QHD (2560x1440) Monitor, 60Hz, IPS, 5ms, Ultrathin Bezel, 99% sRGB, DisplayPort, HDMI, 5x USB, 3 Year Warranty

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Dell TODO by

Ciro Santilli 35  Updated 2025-04-18  +Created 1970-01-01

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Normalized DFT by

Ciro Santilli 35  Updated 2025-04-18  +Created 1970-01-01

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There are actually two possible definitions for the DFT:

1/N, given as "the default" in many sources:
$x_{n} = \frac{1}{N} \sum_{k = 0}^{N - 1} X_{k} e^{i 2 π \frac{kn}{N}}$
(1)
$1/ N$ , known as the "normalized DFT" by some sources: www.dsprelated.com/freebooks/mdft/Normalized_DFT.html, definition which we adopt:
$x_{n} = \frac{1}{N} \sum_{k = 0}^{N - 1} X_{k} e^{i 2 π \frac{kn}{N}}$
(2)