Author Archives: pappp

Source: Hacker News

Source: Hacker News

Source: Slashdot

The nation's best-known public universities have been on an unfettered spending spree. Over the past two decades, they erected new skylines comprising snazzy academic buildings and dorms. They poured money into big-time sports programs and hired layers of administrators. Then they passed the bill along to students. From a report: The University of Kentucky upgraded its campus to the tune of $805,000 a day for more than a decade. Its freshmen, who come from one of America's poorest states, paid an average $18,693 to attend in 2021-22. Pennsylvania State University spent so much money that it now has a budget crisis -- even though it's among the most expensive public universities in the U.S. The University of Oklahoma hit students with some of the biggest tuition increases, while spending millions on projects including acquiring and renovating a 32,000-square-foot Italian monastery for its study-abroad program. The spending is inextricably tied to the nation's $1.6 trillion federal student debt crisis. Colleges have paid for their sprees in part by raising tuition prices, leaving many students with few options but to take on more debt. That means student loans served as easy financing for university projects. It has long been clear to American families that the cost of college has gone up, even at public schools designed to be affordable for state residents. To get at the root cause, The Wall Street Journal examined financial statements since 2002 from 50 universities known as flagships, typically the oldest public school in each state, and adjusted for inflation. At the median flagship university, spending rose 38% between 2002 and 2022. Only one school in the Journal's analysis -- the University of Idaho -- spent less. The schools paid for it in part by pulling in tuition dollars. The median flagship received more than double the revenue from undergraduate and graduate tuition and fees it did 20 years prior. Even accounting for enrollment gains, that amounted to a 64% price increase for the average student, far outpacing the growth in most big household expenses.

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Source: Ars Technica

Enlarge / An 8th-generation Intel Core desktop CPU, one of several CPU generations affected by the Downfall bug. (credit: Mark Walton)

It's a big week for CPU security vulnerabilities. Yesterday, different security researchers published details on two different vulnerabilities, one affecting multiple generations of Intel processors and another affecting the newest AMD CPUs. "Downfall" and "Inception" (respectively) are different bugs, but both involve modern processors' extensive use of speculative execution (a la the original Meltdown and Spectre bugs), both are described as being of "medium" severity, and both can be patched either with OS-level microcode updates or firmware updates with fixes incorporated.

AMD and Intel have both already released OS-level microcode software updates to address both issues. Both companies have also said that they're not aware of any active in-the-wild exploits of either vulnerability. Consumer, workstation, and server CPUs are all affected, making patching particularly important for server administrators.

It will be up to your PC, server, or motherboard manufacturer to release firmware updates with the fixes after Intel and AMD make them available.

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Source: Hacker News

Source: Ars Technica

Enlarge (credit: Getty)

Google resisted pleas to extend the lifetime of Chromebooks set to expire as of this June and throughout the summer. Thirteen Chromebook models have met their death date since June 1 and won't receive security updates or new features from Google anymore. But that hasn't stopped the Chromebooks from being listed for sale on sites like Amazon for the same prices as before.

Take the Asus Chromebook Flip C302. It came out in 2018, and on June 1—about five years later—it reached its automatic update expiration (AUE) date. But right now, you can buy a "new," unused Flip C302 for $550 from Amazon or $820 via Walmart's Marketplace (providing links for illustrative purposes; please don't buy these unsupported laptops).

That's just one of eight Chromebooks that expired since June while still being readily available on Amazon. The listings don't notify shoppers that the devices won't receive updates from Google. The US Public Interest Research Group (PIRG) pointed this out in a press release Wednesday, sharing screenshots of the models:

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Source: Hacker News

Source: Hack a Day

If there’s only lesson to be learned from [alnwlsn]’s conversion of an IBM Selectric typewriter into a serial terminal for Linux, it’s that we’ve been hanging around the wrong garbage cans. Because that’s where he found the donor machine for this project, and it wasn’t even the first one he’s come across in the trash. The best we’ve ever done is a nasty old microwave.

For being a dumpster find, the Selectric II was actually in pretty decent shape. The first couple of minutes of the video after the break show not only the minimal repairs needed to get the typewriter back on its feet, but also a whirlwind tour of the remarkably complex mechanisms that turn keypresses into characters on the page. As it turns out, knowing how the mechanical linkages work is the secret behind converting the Selectric into a teletype, entirely within the original enclosure and with as few modifications to the existing mechanism as possible.

Keypresses are mimicked with a mere thirteen solenoids — six for the “latch interposers” that interface with the famous whiffletree mechanism that converts binary input to a specific character on the typeball, and six more that control thinks like the cycle bail and control keys. The thirteenth solenoid controls an added bell, because every good teletype needs a bell. For sensing the keypresses — this is to be a duplex terminal, after all — [alnwlsn] pulled a page from the Soviet Cold War fieldcraft manual and used opto-interrupters to monitor the positions of the latch interposers as keys are pressed, plus more for the control keys.

The electronics are pretty straightforward — a bunch of MOSFETs to drive the solenoids, plus an AVR microcontroller. The terminal speaks RS-232, as one would expect, and within the limitations of keyboard and character set differences over the 50-odd years since the Selectric was introduced, it works fantastic as a Linux terminal. The back half of the video is loaded with demos, some of which aptly demonstrate why a lot of Unix commands look the way they do, but also some neat hybrid stuff, like a ChatGPT client.

Hats off to [alnwlsn] for tackling a difficult project while maintaining the integrity of the original hardware.

Source: Hacker News