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#engineering

169 posts53 participants0 posts today
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♡ Eva Winterschön ♡

💻 FreeBSD CUDA drm-61-kmod 💻

"Just going to test the current pkg driver, this will only take a second...", the old refrain goes. Surely, it will not punt away an hour or so of messing about in loader.conf on this EPYC system...

- Here are some notes to back-track a botched/crashing driver kernel panic situation.
- Standard stuff, nothing new over the years here with loader prompt.
- A few directives are specific to this system, though may provide a useful general reference.
- The server has an integrated GPU in addition to nvidia pcie, so a module blacklist for the "amdgpu" driver is necessary (EPYC 4564P).

Step 1: during boot-up, "exit to loader prompt"
Step 2: set/unset the values as needed at the loader prompt

unset nvidia_load
unset nvidia_modeset_load
unset hw.nvidiadrm.modeset
set module_blacklist=amdgpu,nvidia,nvidia_modeset
set machdep.hyperthreading_intr_allowed=0
set verbose_loading=YES
set boot_verbose=YES
set acpi_dsdt_load=YES
set audit_event_load=YES
kern.consmsgbuf_size=1048576
set loader_menu_title=waffenschwester
boot

Step 3: login to standard tty shell
Step 4: edit /boot/loader.conf (and maybe .local)
Step 5: edit /etc/rc.conf (and maybe .local)
Step 6: debug the vast output from kern.consmsgbuf logs

Screenshot of an IPMI terminal, showing the FreeBSD kernel loader prompt, with variables printed, and the discussed variables being set. After this stage, the boot process resumes.
#freebsd#nvidia#cuda
Public
Jer 🚵🏼

This isn't a #Caturday post, I swear, he's just there for scale.

I'm trying to figure out a mount for this vertical wind spinner and figured there might be people with opinions on this. I printed a slightly larger VAWT (vertical axis wind turbine) and would like to experiment with hooking a small generator to see how much it produces. We've had a slightly smaller spinner for a few years that is almost always spinning and has held up really well, but it's not well suited for adding gears and gen. The old one has bearing mounts on top and bottom. Been wondering if this new one could use a thick base with two bearings instead. That seems like a lot of lateral torque under heavy winds though, which might cause gears to un-mesh or bearings to fail early.

black cat for scale next to a wind spinner that is loosely mounted to a 2x4 at base as an example.
older wind spinner that’s mounted at top and bottom, shown during snowstorm so not as easy to see both ends, but does show the type of conditions to expect
#engineering#mechanicalDesign#WindPower
Public
MediaFaro Magazine

On this day in 1204, the Fourth Crusade occupies and plunders Constantinople. #Crusades

On this day in 1961, Soviet cosmonaut Yuri Gagarin, aboard the Vostok-3KA spacecraft, becomes the first human to travel into space and orbit Earth. #Space #Gagarin

On this day in 1937, the first aircraft jet engine is successfully tested by Frank Whittle, only a few months before German engineer Hans von Ohain ran his jet engine. #JetEngine #Engineering

MediaFaro: On This Day in Europe
#OTD#OnThisDay#OnThisDayInEurope
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Redhotcyber

Violazione Dati Personali dell’App Tua Abruzzo: Un ennesimo attacco alla Supply Chain

📌 Link all'articolo : redhotcyber.com/post/violazion

il blog della sicurezza informatica · Violazione Dati Personali dell'App Tua Abruzzo: Un ennesimo attacco alla Supply ChainTuabruzzo informa i propri utenti di una recente violazione di dati personali che ha coinvolto il fornitore di servizi informatici MyCicero S.r.l., incaricato come Responsabile del trattamento dei dati. La trasparenza nei confronti degli utenti è una priorità assoluta, motivo per cui è stato deciso di comunicare apertamente quanto accaduto. L’azienda sottolinea l’importanza di mantenere […]
#redhotcyber#hacking#cti
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