Nostr notes by Lukas

Zu schade, dass der 40C3 nicht auf dem Messegelände Hannover ...

2026-03-03T20:08:17Z

Zu schade, dass der 40C3 nicht auf dem Messegelände Hannover stattfindet, sonst hätte man das Event CCCeBIT nennen können.

Looking at the changelog for 6.17.3, ...

2026-02-06T16:11:15Z

In reply to nevent1q…yspc
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Looking at the changelog for 6.17.3, https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=9c328f54741bd5465ca1dc717c84c04242fac2e1 was the only thing related to NFC.

Reverting this commit on the sources of the running kernel 6.18.7 and loading the patched module made NFC work again!

So it was time for my first mail to LKML: https://lore.kernel.org/lkml/11b7567e-b9a4-4546-9b1c-bb9820bead0c@0x83.eu/T/#u

Let's see where this'll go.

🧵 3/3

Being a hardware person, I did the obvious next thing an checked ...

2026-02-06T16:10:55Z

In reply to nevent1q…2tuj
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Being a hardware person, I did the obvious next thing an checked that the NFC waves are emanating from the touchpad which was the case. Tags however didn't react all, probably due to missing interrogation signal.

Running out of ideas, I downgraded the kernel back to the version I was running back when I got NFC to work.

Lo and behold, nfctool was detecting tags! After manually bisecting arch kernel versions, I found that NFC stoppend working from 6.17.2 to 6.17.3.

🧵 2/3

The story doesn't end here. After a comment on the Arch Wiki, ...

2026-02-06T16:10:10Z

In reply to nevent1q…94t7
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The story doesn't end here. After a comment on the Arch Wiki, I tried NFC again and it didn't work anymore to the point that nfc0 was gone. After staring at the DSDT and sysfs for half an evening and subsequently wondering why NFC was absent from the "BIOS" setup, I got the idea that the technician doing a mainboard swap some weeks ago might have forgotten to reconnect the NFC module.

Turns out that was indeed the case 🤦. While the NFC reader is now detected, it still didn't read any tags 🧵 1/3

There you go. ...

2026-01-29T20:02:27Z

In reply to nevent1q…xmvr
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There you go.

One of them isn't like the other. ...

2026-01-29T18:37:31Z

One of them isn't like the other.

This! Or beat the technology connections guy with an even faster ...

2025-12-11T20:42:47Z

In reply to nevent1q…va5y
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This! Or beat the technology connections guy with an even faster kettle.

People need to do more silly stuff now that half a megawatt of electrical power is easily accessible.

Turns out, it's worse than this: The ipv6-literal.net ...

2025-07-18T18:05:54Z

In reply to nevent1q…rvus
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Turns out, it's worse than this: The ipv6-literal.net shenanigans aren't limited to UNC paths.

It works in all places:
> ping 2a0e-3c0--21.ipv6-literal.net

Pinging 2a0e:3c0::21 with 32 bytes of data:

Also works in browsers: http://2a0e-3c0--21.ipv6-literal.net/

Thanks to Christian Berger DECT 2763 (npub1a09…pult) for asking.

Mildly cursed factoid about UNC paths: - UNC Paths can contain IP ...

2025-07-18T17:04:30Z

Mildly cursed factoid about UNC paths:

- UNC Paths can contain IP addresses such as \\192.168.1.1\share
- IPv6 addresses are supported as well
- IPv6 addresses contain colons
- can't have colons in Windows paths since colons are reserved for drive letters

So Microsoft came up with the the ipv6-literal.net domain that's special-cased by Windows so you can to write IPv6 addresses in UNC paths as 2a0e-3c0--21.ipv6-literal.net without it hitting any resolvers.

Since everyone here seems to love cursed technology, I made a ...

2025-01-11T18:52:59Z

Since everyone here seems to love cursed technology, I made a chart rating various interfaces by their perceived cursedness.

Some like 10G BASE-T have a reason for being cursed, whereas others like USB PD not so much.

Any additions?

Epoxy a hook to the chip ...

2024-12-22T20:17:25Z

In reply to nevent1q…8dqn
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Epoxy a hook to the chip package:https://www.ipc.org/sites/default/files/test_methods_docs/2.4.53.pdf

How much of a difference does it make whether you pry off the ...

2024-12-22T20:12:42Z

In reply to nevent1q…t4av
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How much of a difference does it make whether you pry off the chip with a knife or rip it off perpendicular to the board with a proper fixture?

The NFC reader on recent ThinkPads actually works more-or-less ...

2024-11-24T21:55:10Z

The NFC reader on recent ThinkPads actually works more-or-less out-of-the box on Linux! Install and start https://github.com/linux-nfc/neard and detected tags pop up as D-Bus objects.

The scripts from the test directory interact with them for quick and easy testing.

Now to find something useful to do with it.

Cursed BGA package (from https://youtu.be/rVJwcZavr9U?t=1311) ...

2024-11-11T21:14:44Z

Cursed BGA package (from https://youtu.be/rVJwcZavr9U?t=1311)

Nostr event nevent1qqsdl26psacsvmujch4u0r9lzv62lnu2l4zr3vhkgcs3ydp33wvmfhgzyr3zwahgsasdye2na75pwr7gn9su86g0r83w0wyyxcjyl67f08xfj4dfmqh

2024-10-30T22:07:11Z

How many digits of pi do you know from the top of your head?

Have been thinking of this for way too long, so here you go: ...

2024-09-26T14:40:43Z

Have been thinking of this for way too long, so here you go:

S-Parameters explained for public transport nerds

Smith charts always reminded me of the the window color mandalas ...

2023-10-01T11:16:06Z

Smith charts always reminded me of the the window color mandalas we did back in kindergarten.

So I got a set of window color paint and did just that 🌈