It seems like Google is working hard to update and upstream the Linux kernel that sits at the heart of every Android phone. The company was a big participant in this year's Linux Plumbers Conference, a yearly meeting of the top Linux developers, and Google spent a lot of time talking about getting Android to work with a generic Linux kernel instead of the highly customized version it uses now. It even showed an Android phone running a mainline Linux kernel.
But first, some background on Android's current kernel mess.Currently, three major forks happen in between the "mainline" Linux kernel and a shipping Android device (note that "mainline" here has no relation to Google's own "Project Mainline"). First, Google takes the LTS (Long Term Support) Linux kernel and turns it into the "Android Common kernel"—the Linux kernel with all the Android OS-specific patches applied. Android Common is shipped to the SoC vendor (usually Qualcomm) where it gets its first round of hardware-specific additions, first focusing on a particular model of SoC. This "SoC Kernel" then gets sent to a device manufacturer for even more hardware-specific code that supports every other piece of hardware, like the display, camera, speakers, usb ports, and any extra hardware. This is the "Device Kernel," and it's what actually ships on a device.
This is an extremely long journey that results in every device shipping millions of lines of out-of-tree kernel code. Every shipping device kernel is different and device specific—basically no device kernel from one phone will work on another phone. The mainline kernel version for a device is locked in at the beginning of an SoC's initial development, so it's typical for a brand-new device to ship with a Linux kernel that is two years old. Even Google's latest and, uh, greatest device, the Pixel 4, shipped in October 2019 with Linux kernel 4.14, an LTS release from November 2017. It will be stuck on kernel 4.14 forever, too. Android devices usually do not get kernel updates, probably thanks to the incredible amount of work needed to produce just a single device kernel and the chain of companies that would need to cooperate to do it. Thanks to kernel updates never happening, this means every new release of Android usually has to support the last three years of LTS kernel releases (the minimum for Android 10 is 4.9, a 2016 release). Google's commitments to support older versions of Android with security patches means the company is still supporting kernel 3.18, which is five years old now. Google's band-aid solution for this so far has been to team up with the Linux community and support mainline Linux LTS releases for longer, and they're now up to six years of support.
Chicago student now faces up to 20 years in prison if found guilty.
AT&T's traditional TV business is tanking, with the company having lost nearly 5 million satellite and wireline TV customers since the end of 2016.
But AT&T President John Stankey sees a path forward in recreating the traditional cable-TV bundle on the Internet. AT&T's HBO Max is slated to launch in May 2020 for $14.99 a month, and AT&T has set an ambitious goal of 50 million US subscribers within five years.
A subscriber number like that would make HBO Max far bigger than AT&T's DirecTV satellite division and its U-verse wireline TV service. But ultimately, the service customers get could end up looking pretty similar to DirecTV, U-verse, or cable TV.
People under the influence of a psychedelic brew known as ayahuasca frequently experience vivid visual and aural hallucinations and also report feeling as if they are in a dream. Now a new study published in Scientific Reports has shown that the drug alters the user's waking brain-wave patterns to produce a mental state that the researchers describe as "dreaming while awake."
Ayahuasca is a bitter tea made from the Brazilian vine banisteriopsis caapi, colloquially known as the "spirit vine," used in shaman-led spiritual ceremonies among native people in the Amazon basin. Its primary active ingredient is dimethyltryptamine (DMT). That's the secret to ayahuasca's powerful psychedelic effects, which can also produce feelings of elation and fear or a sense of epiphany or psychological breakthrough. Those mind-altering properties come at a price, however. Participants in the ceremonies are often advised to bring a bucket, since nausea and vomiting (and sometimes diarrhea) are common reactions to the tea.
The brain controls perception and communication throughout the body via chemical neurotransmitters. Each neurotransmitter attaches to matching areas on nerve cells known as receptors. LSD, for example, targets the brain's serotonin receptors. Ayahuasca contains a compound (banisterine) that latches onto dopamine receptors in the brain. (That's why banisterine holds potential as a treatment for Parkinson's disease, which destroys dopamine receptors.)
In a statement, WhatsApp said that it had no reason to believe that users phones were affected.
The annual flu shots that are free to those with health insurance are not immune from the convoluted and contemptible price-gouging that plague the US healthcare system.
Health insurance companies pay wildly different amounts for the same vaccines depending on how negotiations go with individual medical providers across the country. In some cases, providers have forced insurers to pay upward of three times the price they would pay to other providers, according to an investigation by Kaiser Health News.
The outlet noted that one Sacramento, California, doctors’ office got an insurer to pay $85 for a flu shot that it offered to uninsured patients for $25.
Password data and other personal information belonging to as many as 2.2 million users of two websites—one a cryptocurrency wallet service and the other a gaming bot provider—have been posted online, according to Troy Hunt, the security researcher behind the Have I Been Pwned breach notification service.
One haul includes personal information for as many as 1.4 million accounts from the GateHub cryptocurrency wallet service. The other contains data for about 800,000 accounts on RuneScape bot provider EpicBot. The databases include registered email addresses and passwords that were cryptographically hashed with bcrypt, a function that's among the hardest to crack.
The person posting the 3.72GB Gatehub database said it also includes two-factor authentication keys, mnemonic phrases, and wallet hashes, although GateHub officials said an investigation suggested wallet hashes were not accessed. The EpicBot database, meanwhile, purportedly included usernames and IP addresses. Hunt said he selected a representative sample of accounts from both databases to verify the authenticity of the data. All of the email addresses he checked were registered to accounts of the two sites.
Researchers at Brigham Young University have created a new RF protocol that runs on top of existing consumer Wi-Fi at significantly greater range. But before you get too excited, the protocol's bandwidth is extremely low—so much so that it makes LoRa look like an OC-24. The protocol, called ONPC—short for On-Off Noise Power Communication—currently only specifies a single bit per second.
Although ONPC only conveys one bit per second of data, its range is 60m or more beyond Wi-Fi—and it runs in software alone, on unmodified Wi-Fi hardware. An ONPC device can connect to standard Wi-Fi when range permits, fall back to ONPC mode if the connection drops, and then re-connect to the Wi-Fi when it becomes available again.Disconnected versus unpowered
BYU Associate Professor of Computer Engineering Phil Lundrigan told Ars that ONPC was inspired by problems in an otherwise unrelated health care research project he'd worked on. The project required placing IoT sensors in the homes of study participants so that BYU's control over the environment was minimal to nonexistent. The project also required the sensors to report back to the researchers over the Internet, using whatever Wi-Fi the study participants had in place.
The explosion of solar energy capacity has been driven almost entirely by the plunging cost of photovoltaic hardware. That has made the situation difficult for an alternate technology known as solar thermal. Thermal uses mirrors to focus incoming sunlight onto a location that reaches high temperatures, which can then be used to generate electricity by driving a steam turbine. Since heat is relatively easy to store, these plants can continue to produce power long after the Sun has set. In some cases, these plants are able to operate around the clock.
Today, a company backed by tech investors is announcing that it has developed an enhanced form of solar thermal generation that can push the temperatures at the point of focus much higher. That's significant, because the promised temperatures reach heat needed for industrial processes like concrete production, metallurgy, and hydrogen production. While there are clear advantages when it comes to generating electricity, the key to this technology may be how readily it can be integrated into these industrial processes.A hot startup
The company in question is a startup called Heliogen, which has received backing from several Silicon Valley investors and Bill Gates. But the technology Heliogen has developed does have a rather heavy tech component.
Back in September, Facebook updated its location privacy settings for users. "Facebook is better with location," the company stressed, but users were free to turn off location tracking, and the company would be happy to tell them how. That setting, however, comes with an enormous loophole, and two US senators want the company to explain itself.
Senators Chris Coons (D-Del.) and Josh Hawley (R-Mo.) today sent a letter (PDF) to Facebook asking the company how, exactly, it tracks users' locations—even when location access and location history are disabled.
"We appreciate Facebook's attempt to proactively inform users about their privacy options," the senators wrote. "However, we are concerned that Facebook may not in fact be offering users the level of control that the company suggests these settings provide."
Greetings, Arsians! The Dealmaster is back with another round of deals to share. Today's deal is headlined by a $150 discount on the OnePlus 7 Pro, a device we called the "fastest, best-designed, best-value Android phone" on the market earlier this year.
The deal applies to unlocked models—which work on Verizon and GSM networks like AT&T and T-Mobile—and brings the phone down to $549. OnePlus says this is their official Black Friday discount for the holiday season, and our own Android guru Ron Amadeo told the Dealmaster it will likely go down as the "smartphone deal of the year."
You can read Ron's review from this past May for the full details, but the short take is that the OnePlus 7 Pro was already a good value at its standard going rate of $699. Despite being a large phone, it's been efficiently designed, with no notches or overly large borders blocking the the 6.67-inch 3120x1440 display. The in-display fingerprint reader and pop-up selfie camera only add to that efficiency, and both work well. That display supports a 90Hz refresh rate, too, which makes operating the device feel noticeably smoother across the board. The Snapdragon 855 processor, 8GB of RAM, and UFS 3.0 storage keep general performance as snappy as a top-of-the-line phone should. The triple-camera system on the back isn't the absolute best on the market, but it's still a great value for the price. And the "Oxygen OS" software remains a uniquely clean and useful take on Android.