Unklejoe (u/Unklejoe)

Unklejoe commented on Robot can rip the data out of RAM chips theregister.com/2023/06/0... · Posted by u/laktak

coppsilgold · 3 years ago

AMD Ryzen Pro CPUs have a memory encryption feature (SME): <https://www.amd.com/system/files/documents/amd-memory-guard-...>

It may require to have support from the motherboard.

EFI firmware has a var (/sys/firmware/efi/efivars/) named MemoryOverwriteRequestControl that if set is supposed to instruct the firmware to overwrite memory on next boot. If you set it and if you can somehow trigger a reboot memory should not be recoverable.

You can also set init_on_free=1 in linux cmdline, the kernel will overwrite freed memory. If a reboot is physically interrupted or if the EFI firmware does not honor the var mentioned above, encryption keys and any other private data may have been freed.

Unklejoe · 3 years ago

> You can also set init_on_free=1 in linux cmdline, the kernel will overwrite freed memory.

Does this only work with kernel buffers? I’m wondering how glibc handles freed memory. I feel like there’s a good chance it doesn’t always notify the kernel that the memory has been freed.

Unklejoe commented on Automakers are starting to admit that drivers hate touchscreens slate.com/business/2023/0... · Posted by u/NN88

Unklejoe · 3 years ago

Can we talk about capacitive buttons while we’re at it? Worse in every way from a usability perspective. Supposedly more reliable, yet I’ve had plenty of failures.

My damn dishwasher has capacitive buttons…a dishwasher - something you use while your hands are wet like 90% of the time. Infuriating.

Unklejoe commented on Hyundai promises to keep buttons in cars thedrive.com/news/hyundai... · Posted by u/nixass

tiedieconderoga · 3 years ago

Core functions like HVAC and hazard lights deserve dedicated controls, but modern cars also need a type of input that can be used with a tablet-sized display. What to do?

*Rotary Encoders*

The best type of input for a car is a rotary encoder, a knob with tactile "clicks" that register as you turn it. Good ones can also be pressed down like a button, and moved in cardinal directions like a d-pad.

Have one for your volume knob: pressing it down toggles muting.

Have one for the main controls: twisting moves the cursor, swiping changes which app is selected.

Have one on a steering wheel stalk, to cycle between display modes on one of the dashboard display's rounds.

We need more rotary encoders.

Unklejoe · 3 years ago

BMW uses a rotary encoder for their iDrive thing. I have it in my 2011 3 series.

People trash talk it, but I actually like it.

Unklejoe commented on Ask HN: What career would you switch into if AI ate your profession? · Posted by u/rohanshah

Unklejoe · 3 years ago

I’d become a burner technician for boilers. You have to be technically minded so there are some barriers to entry, and it’s basically critical infrastructure so there’s some security. They also get paid well.

Unklejoe commented on Apple Lightning (2020) nyansatan.github.io/light... · Posted by u/aix1

krzyk · 3 years ago

I don't understand.

Just place a phone/charging case on a Qi charger? Doesn't CarPlay support wireless communication? Android Auto does.

Unklejoe · 3 years ago

Cars didn’t really start getting wireless CarPlay until around 2021. It would take a while for those cars to age out. My guess is that if Apple makes a portless iPhone, they will also make a wireless to wired CarPlay bridge.

Unklejoe commented on Ask HN: What are your predictions for 2023? · Posted by u/csomar

Unklejoe · 3 years ago

There is a serious push to find a way to tax electric car owners to make up for the lack of a road tax that’s normally rolled into gasoline prices. Some people will propose tracking the mileage, while others will resist that idea because of privacy reasons. It will be debated here on HN.

Kind of a cheat guess since it’s already starting to happen now, but I expect it to intensify as more and more people get EVs.

Unklejoe commented on Promotion of alternative social platforms policy help.twitter.com/en/rules... · Posted by u/ttepasse

Unklejoe · 3 years ago

It’s actually kind of cool to see Mastodon being enough of a threat to be talked about these days.