rft (u/rft) - Readit News

rft commented on Bet on German Train Delays bahn.bet... · Posted by u/indiantinker

luke5441 · 13 days ago

Idea for using the betting/data or other statistics about potential train delay:

One gets back 50% if reaching the destination is delayed by more than 2h. Schedule the journey such that this is probable, making the journey 50% cheaper. Potentially with being able to define where one should be stuck waiting for the next train connected with sight seeing opportunities (such as the nice quarter near the Frankfurt main train station -- old ECB building!).

rft · 13 days ago

In 2019 there was a talk about data mining the DB arrival data [1] (yes, this problem is nothing new). One of the takeaways was that on some connections you can actually buy a "Sparticket" (cheaper, but only valid for a specific train), but get it upgraded to a "Flexticket" (more expensive, can take any train on the route) for free. This works because a delay of more than X minutes removes the specific train requirement and some routes are nearly always delayed by at least that threshold.

[1] https://media.ccc.de/v/36c3-10652-bahnmining_-_punktlichkeit... (German)

rft commented on Go Home, Windows EXE, You're Drunk gpfault.net/posts/drunk-e... · Posted by u/ibobev

rft · 2 months ago

Related, there is a stable way to detect whether your .exe is running under Wine and even which version by looking up the address of the export wine_get_version in ntdll [1]. Years ago I actually had to do this to work around some weird path bug when we were testing our Windows build under Wine (easier to setup Wine than a full Windows CI).

[1] https://www.winehq.org/pipermail/wine-devel/2008-September/0...

rft commented on 39th Chaos Communication Congress Videos media.ccc.de/b/congress/2... · Posted by u/Jommi

neiman · 2 months ago

Where were people's favourite lectures?

I attended 7 talks.

My favourite talk by far was hacking the GPG. Brilliant, really: https://media.ccc.de/v/39c3-to-sign-or-not-to-sign-practical...

The "In-house electronics manufacturing from scratch" was a very inspiring talk: https://media.ccc.de/v/39c3-in-house-electronics-manufacturi...

The rest were less good for me personally. Either over-dramatic and shallow (with a sexy-sounding topic) or too procedural in topics I'm not an expert in.

rft · 2 months ago

I still have to go through my watch list, the age old issue of not having my slides done before congress...

The 10 year of Dieselgate is interesting just from a "how bad is it really?" PoV, I saw the part about curves and other defeat devices already [1].

The Rowhammer talk is likely going to be great as well, I like Daniel's work [2].

The practical Cross-VM Spectre was interesting to show this is still a problem [3].

The opensource secure element was good for trying such a thing, but I wasn't that impressed with the content [4].

[1] https://cfp.cccv.de/39c3/talk/7MSRA7/ https://media.ccc.de/v/39c3-10-years-of-dieselgate

[2] https://cfp.cccv.de/39c3/talk/3JXAJJ/ https://media.ccc.de/v/39c3-rowhammer-in-the-wild-large-scal...

[3] https://cfp.cccv.de/39c3/talk/ATYLN9/ https://media.ccc.de/v/39c3-spectre-in-the-real-world-leakin...

[4] https://cfp.cccv.de/39c3/talk/9DYZXG/ https://media.ccc.de/v/39c3-lessons-from-building-an-open-ar...

rft commented on The Angry Path to Zen: AMD Zen Microcode Tools and Insights [video] media.ccc.de/v/39c3-the-a... · Posted by u/Fnoord

rft · 2 months ago

Author here, happy to answer any questions you might have.

rft commented on WinApps: Run Windows apps as if they were a part of the native Linux OS github.com/winapps-org/wi... · Posted by u/klaussilveira

SapporoChris · 4 months ago

Most things work great. There are some niche things that do not work so well. Example: SteamVR,Vive VR Hub, some AntiCheat for games.

rft · 4 months ago

SteamVR works ok, but last I checked it still performs worse than on Windows. If you are feeling adventurous, you can try a FOSS VR stack [1]. It works for Steam games running Proton and when it works it provides better performance. I had some troubles with it, sometimes you need to switch versions or you get some artifacts in games, or some games just don't work at all. Good thing is, switching between FOSS and SteamVR is as simple as launching either first before starting the VR game in Steam.

I guess the Linux VR stack might get a bit of love from Valve for the Steam Frame, so things might improve in the near future.

[1] https://lvra.gitlab.io/docs/fossvr/envision/

rft commented on A monopoly ISP refuses to fix upstream infrastructure sacbear.com/xfinity-wont-... · Posted by u/vedmed

hurricanepootis · 4 months ago

I got a problem with my AT&T Fiber service at the house. We pay for a 500 Mbps plan, and I can get 600 Mbps up and down via ethernet on speedtest (probably due to over provisioning). However, I can only download stuff about 8 MB/s from most places. I believe this to be an internal issue as whenever I connect to any VPN service, I can get the full 600 Mbps. Furthermore, some servers are able to serve me at full speed, but this is rare. Usually GitHub git servers can upload to me at full speed, while GitHub tar balls are uploaded to me at about 8 MB/s.

Seeing as everyone in here has a lot of bad experiences with ISPs, should I straight up skip attempting to talk with them at all and go for an FCC complaint/government complaint?

rft · 4 months ago

At this point escalating, or threatening to, might be the better option. But I can't help trying to figure out how to solve a people/organizational problem with a technological solution.

Github is still famously IPv4 only. I don't know if there is a split between the SSH (if you use SSH to access the repos) and HTTPS (the tarballs) setup on their end, so maybe you get full speed on IPv6 and limited on IPv4 (or the other way around). Try disabling IPv6 on your end, if the speeds match then this might be it. If IPv6 is fast using an IPv4 gateway that tunnels via an IPv6 VPN might be a workaround.

I also had a similar problem a while back. Some speedtests showed more bandwidth than I could get in regular HTTPS downloads. I could get multiple downloads running at the same time that in total added up to the expected speed. In my case the line was just lossy enough (TCP retransmits in Wireshark) for TCP to never scale up its window size properly beyond a certain limit per connection. I verified this by running iperf in TCP and UDP against a gigabit server, UDP reached near full speed because it didn't care about a few lost packages. Working around that issue might be a bit harder, maybe [1] via [2] can provide some ideas to look into.

[1] https://github.com/apernet/tcp-brutal

[2] https://news.ycombinator.com/item?id=38164574

rft commented on Germany: States Pass Porn Filters for Operating Systems heise.de/en/news/Youth-Pr... · Posted by u/trallnag

raffael_de · 4 months ago

Until Linux is going to be forced into the same regulation. And then until new laws criminalize attempts to bypass the "porn filter" no matter what you use.

rft · 4 months ago

As much as I hate where this might lead, I can't help but amuse myself over a scene like this: You walk up to a bearded fellow in a dark alley and quietly whisper "Stallman..." only for him to quietly respond "... was right.". He then opens his coat for you to choose the install USB of your favorite distro (Arch of course!). He dutifully hands you the stick and a printed copy of the GPLv5 for you to hide in your coat as you walk past the telescreens back to your home.

rft commented on Germany: States Pass Porn Filters for Operating Systems heise.de/en/news/Youth-Pr... · Posted by u/trallnag

fschuett · 4 months ago

> The aim is to protect young people on the internet from age-inappropriate content such as pornography, violence, hate speech, incitement, and misinformation.

Hmmm, I doubt they really care about pornography and more about censoring certain stuff that politicians do not like. But what do I know, I'm probably just a conspiracy theorist.

rft · 4 months ago

That part also caused my tin foil hat to heat up. At least they get the credit of including it directly instead of adding it in a later revision that gets even less news coverage. It is hard not to grow cynical when you see this.

I am also worried about another detail:

> The states also want to prevent the circumvention of blocking orders by erotic portals ... using so-called mirror domains – i.e., the distribution of identical content under a minimally changed web address. For a page to be treated as a mirror page and quickly blocked without a new procedure, it must essentially have the same content as the already blocked original.

Note the part "quickly blocked without a new procedure" so there is a way to block sites with even less process and oversight. That just invites overblocking without accountability.

rft commented on NTSB Preliminary Report – UPS Boeing MD-11F Crash [pdf] ntsb.gov/Documents/Prelim... · Posted by u/gregsadetsky

TinkersW · 4 months ago

One other accident that was similiar, but these planes have had a ton of crashes for other reason.

rft · 4 months ago

I managed to find some statistics on hull losses per million departures [1, p. 13]. Seems like indeed MD-11s have a highish rate of incidents by that metric compared to other types, even if they are not catastrophically less safe than other planes. That metric stacks the statistics a bit against cargo planes, which most (all?) MD-11s are now. These planes tend to fly longer haul instead of short hop, so you get more flight time/miles but less departures. There are also likely some other confounding factors like mostly night operations (visibility and crew fatigue) and the tendency to write off older planes instead of returning them to service after an incident. Plus these aircraft have been in operation long enough that improvements in procedures and training would impact them less than more modern types, as in they already had more accidents before these improvements.

[1] https://www.boeing.com/content/dam/boeing/boeingdotcom/compa...

rft commented on NTSB Preliminary Report – UPS Boeing MD-11F Crash [pdf] ntsb.gov/Documents/Prelim... · Posted by u/gregsadetsky

bunderbunder · 4 months ago

And if the failure of a wing engine can cause the rear engine to fail, that would raise concerns about all "two in front one in back" trijets. Similar to how putting the Space Shuttle orbiter's heat shield directly in the line of fire for debris that comes off he rocket during launch turned out to be a bit of a problem.

rft · 4 months ago

At some point it comes down to probabilities. With so many flights going on, one in a million incidents become a certainty. For example UA232 [1] suffered failure in all 3 redundant hydraulic systems due to an uncontained engine failure. Any of the 3 systems would have been enough to retain control of the aircraft. Of course this lead to some investigations on why all 3 systems could be impacted at the same time and what can be done to limit failures.

Besides the technical aspects that flight is an impressive example of resilience and skill. Bringing that plane down to the ground in nearly one piece was essentially impossible and a one in a million chance in itself.

[1] https://en.wikipedia.org/wiki/United_Airlines_Flight_232