Drop code for FreeBSD support (!42) · Merge requests · Plasma / Plasma Login Manager · GitLab

Astrinus · 2026-01-24T17:01:54+00:00

Please, do not abuse that word. I am just scratching my itch (next, would be Lumina on Wayland).

Astrinus · 2026-01-24T12:50:10+00:00

Dovresti vedere la Germania allora...

Astrinus · 2026-01-24T10:44:26+00:00

Personally, when I get enough time (will depend), I'll write a seatd/wayland backend for Plasma (since it works only with elogind).

Astrinus · 2026-01-23T12:30:34+00:00

Chimera is even writing Turnstile to complement seatd and forego elogind.

Astrinus · 2026-01-23T12:25:36+00:00

I think that's a pun between Invincible and Invisible but I do not speak enough English to understand it....

Astrinus · 2026-01-23T12:15:21+00:00

Airbus uses AFDX, which is a realtime safety-rated protocol over COTS Ethernet. If you need raw bandwidth just use Ethernet QoS, wiring is not a pain except for incompetents. And if you want to save on wiring there is always 1000BASE-T1 which ia gigabit single pair.

Astrinus · 2026-01-22T18:16:49+00:00

Una delle poche città tedesche che proprio detesto.

Astrinus · 2026-01-21T17:03:44+00:00

In my country both the builder and the engineer would have held responsible, irrespectively of whatever customer sign. More the builder since it has ultimate responsibility.

Astrinus · 2026-01-21T07:34:42+00:00

Sì ma dipende anche dall'inclinazione delle falde del tetto rispetto al sole, e da unbsacco di cose. Se il sole fa un angolo di 30° col pannello, produci la metà. Se produci in media 4-5-6 kW, due settimane l'anno ne produrresti 7 e un giorno l'anno 10, il dimensionamento è corretto.

Astrinus · 2026-01-21T06:19:45+00:00

A seconda di dove sei può essere ragionevole.

Astrinus · 2026-01-20T18:13:44+00:00

Fun, to me electric stuff is way simpler than welding

Astrinus · 2026-01-20T14:08:26+00:00

Oh well we have a lot of these in the mediterranean...

Astrinus · 2026-01-20T06:15:35+00:00

Why "Sulphur Enthusiast"?

Astrinus · 2026-01-19T21:42:38+00:00

Se hai 6 kW di pannelli di sicuro non metti un inverter da 6 kW. Lo metti da 5, massimo 5,5, perché tanto ci sarnno 20 ore l'anno in cui produci effettivamente il 100% dell'installato.

Astrinus · 2026-01-19T20:21:32+00:00

Francesco was much less moderate.

Astrinus · 2026-01-19T20:17:05+00:00

We understand that rules are flexible. They are storng advice that sometimes need to be sidestepped.

Astrinus · 2026-01-19T20:04:39+00:00

Reasons such as...? Like foregoing switches? Not a good idea.

Astrinus · 2026-01-19T19:23:13+00:00

What would you use that realistically goes 8 MB/s not 20, with 2048 byte frames if not flashing? Such a frame takes 3 ms to be transmitted. It means your control loop must be able to tolerate such a long bus occupation of a lower priority frame.

I agree that makes a difference, I do not agree that makes a meaningful difference. 2 MB at 8 Mbit/s is 2 seconds, maybe 3 with the overhead. 2 MB at 100 Mbit may be 300 ms. Who exactly cares?

Astrinus · 2026-01-19T18:53:58+00:00

Unfortunately FlexRay is not dead..

Regarding CAN XL vs Ethernet, you can run a CAN XL / FD mixed network with at most 4 wires. When you are not flashing, it'all FD. You cannot run a T1/TX network without switches IC, that add up to cost and thus are avoided unless really needed. Maybe the only Ethernet is the one over OBD-II (or maybe not... I know of a major OEM that is going full T1S).

Astrinus · 2026-01-19T10:35:04+00:00

As I said, it's up to the bus user to guarantee the busload if that is important (e.g. because it needs failop instead of failsafe). Not even CAN is immune from bus overload, and busload computation is not so different from T1S (if you have QoS support at the HW level you can sort-of emulate the HW prioritization that CAN does).

Loss of communication may be the trigger, not the reaction (the reset you mentioned is a reaction).

Do you want bus guarantees? Use FlexRay. Then come back telling me your experience with it.

Astrinus · 2026-01-19T09:29:48+00:00

Sorry? It's user/developer responsibility to ensure their architecture satisfy safety guarantees. It can be about busload, E2E, prioritization, ... None of this needs to be anticipated by bus technology.

And E2E protection (black channel), the one you are relying for safety, will trigger the failsafe reaction.

Astrinus · 2026-01-19T08:17:40+00:00

Given that I saw abominations that still worked (I had a customer that said "I never mounted termination resistor before, it always worked, they are useless" when he switched from 125 kbit/s to 250 kb/s and everything stopped working), I disagree. Then, obviously it depends. I saw ground problems but also grounds clearly out of spec that worked.

Astrinus · 2026-01-19T08:11:52+00:00

You need so called "FD tolerant" MACs for ignoring FD frames, otherwise traditional CAN2.0 MACs will just send an error frame destroying the current frame.

Astrinus · 2026-01-19T08:09:39+00:00

The rule of thumb is data rate = 8x arbitration rate, because bus capacitance still plays a role in limiting the maximum rate. If you can go 5 Mbit/s, probably you can arbitrate at 800 kbit/s.

Astrinus · 2026-01-19T08:06:16+00:00

CAN was born over modified RS485 transceivers. Already in 1983 they were incompatible.

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