Beta
×

Welcome to the Slashdot Beta site -- learn more here. Use the link in the footer or click here to return to the Classic version of Slashdot.

Thank you!

Before you choose to head back to the Classic look of the site, we'd appreciate it if you share your thoughts on the Beta; your feedback is what drives our ongoing development.

Beta is different and we value you taking the time to try it out. Please take a look at the changes we've made in Beta and  learn more about it. Thanks for reading, and for making the site better!

Comments

top

Ars Checks Out CyanogenMod's New Installer

ultrasawblade Reflash it back to stock (143 comments)

> "If CyanogenMod Inc. really wants to lower the barrier to entry, they next thing they need is a way for users to just as easily go back to the setup they had before installing CyanogenMod

Reflash your phone back to stock if needed. Sometimes you have to search but typically the manufacturer provides a service tool that can be used. Or you can just take it back to the store you bought it from and make their techs do it.

As far as backing up your data, there are apps to do that.

about 9 months ago
top

Bitcoin Protocol Vulnerability Could Lead To a Collapse

ultrasawblade Temporary problem (256 comments)

There's a finite number of Bitcoins that can be mined.
So this problem will eventually disappear, right?

about 10 months ago
top

Why Does Windows Have Terrible Battery Life?

ultrasawblade Re:mindset (558 comments)

I guess i should say "can be vastly better" as the fact that power management on some laptops is bad under Linux, because of lack of documentation on hardware.

about 10 months ago
top

Why Does Windows Have Terrible Battery Life?

ultrasawblade Re:mindset (558 comments)

Linux certainly wasn't developed in the beginning with portable devices in mind, and it's vastly better in power savings. Most of the devices in TFA's chart are Android tablets.

RT and Windows 8 are an ARM port of NT.
What's interesting about this is that this is the first instance of ACPI and UEFI on an ARM platform.
Everything else running on ARM uses a custom bootloader or something like CFE or U-boot which isn't trying to be some pseudo-pre-OS pile of managed shit.

I think therein lies the answer, because Windows CE devices (running on Intel PXA ARM SoC's) of the day had battery life pretty comparable to their peers. At least from what I could remember. Perhaps ACPI is just a shitty interface for power management, or perhaps Nvidia (most of the Surface hardware is Nvidia based, isn't it) just provides shitty drivers.

about 10 months ago
top

NVIDIA's G-Sync Is VSync Designed For LCDs (not CRTs)

ultrasawblade Re:In English (139 comments)

Well, the video card of course will save power by not rendering a frame until the LCD is ready to take it.

I'm not keen on the low level details of HDMI, but I do know that HDMI and friends send the entire image per frame over the wire. The "RAMDAC" of HDMI is sending a full frame's worth of data over that wire regardless of any changes. It would save a bit of power to not send that if there are no changes.

Even if your videocard did nothing on a given frame, it's framebuffer still got shoved over the HDMI pipe. Every frame.

I guess the reason why you don't want to just send "deltas" over the wire is to avoid having to do the B and I frame junk MPEG does, and maybe to support it where communication between the monitor and source is not bi-directional (though HDCP demands it is such).

I'm not sure if HDMI can accept sending frames on demand. I do know I've seen some monitors in Windows accept low refresh rates like 40Hz. Maybe it's basically just automatically picking a low refresh rate or something when the image is static.

about 10 months ago
top

NVIDIA's G-Sync Is VSync Designed For LCDs (not CRTs)

ultrasawblade Re:In English (139 comments)

Images where there's a low difference of changes can operate at a much higher framerate.

I think this opens up interesting possibilities.

Of course I think the physical response time of the display will be a bottleneck, capping the rate at a maximum below what the GPU can pump out.

Also it can save power. If the GPU is creating frames lower than 60hz then that's less power it needs to spend to do it.

about 10 months ago
top

Windows 8.1 Rolls Out Today

ultrasawblade Re:Meh (398 comments)

>Try to run W7 on 1GB -- it is a swap/page fest that will burn up the hard-drive before drawing the desktop.

It's not that bad. Windows 7 is actually efficient and decently responsive.

I had Windows 7 running for a long time on a 1GB 900Mhz Celeron netbook. Aero didn't work, and of course things were slow, but not unusably slow.

Now, I didn't run any real applications on it, like Photoshop, etc. but for basic browsing, etc. and even basic Office use it was OK.

Except for Flash. Flash videos would always stutter, even with plenty of free RAM.

Fortunately, there's Minitube, though I never used the Windows version (Linux is on that system now).

about 10 months ago
top

Stealing Silicon Valley

ultrasawblade Re:strange article (139 comments)

>Just put a "smoke and mirror entrance" system in front of the data center. When they come, lock them in there and call police.
This is illegal (illegal confinement or arrest) and will make you criminally liable. #IANAL.

about a year ago
top

The Linux Backdoor Attempt of 2003

ultrasawblade Re:Type safety (360 comments)

Here's why the UID is 0 and should stay 0.

In most assembly languages, when you compare against a value, you have use a "compare" instruction that effectively does a subtraction, but throws away the result.
In most CPUs, there is a flags register with a zero (Z) bit, which is flipped whenever a value is loaded that is zero.
When you want to see if something like your accumulator or another register is an arbitrary value like 100, you need to do a "compare 100" and then "branch if equal to whatever..."
If it's zero, you can just load the value and skip the compare step. You get a "free compare" when the value you want to compare against is zero.
So if the superuser is not zero, there will be a performance penalty.

Besides, this dumb shit is C's fault for using = and == as operators. Pascal had it right with := being the assignment operator.

about a year ago
top

Will New Red-Text Warnings Kill Casual Use of Java?

ultrasawblade Re:Casual use of Java was dead 10 years ago. (282 comments)

There's a really cool open source SSL VPN called Adito that allows you to do port forwarding over SSL via a browser-launched Java applet.

about a year ago
top

OpenSUSE May Be First Major Distro To Adopt Btrfs By Default

ultrasawblade Awesome (104 comments)

I've been using it awhile, haven't had any problems. Seems to be faster even if it makes my `ps aux` look scary with all those kernel processes.

Hmm ... that volume didn't have that much free space just a few minutes ago ...

about a year ago
top

Ars Technica Reviews iOS 7

ultrasawblade Re:One button to the main screen! Is that changed? (233 comments)

> 1) Nobody's quite sure where "back" should go back to, and what menu "menu" should open
This is a good point. On my current phone, the back button exits out of some apps (those have a back button at the top), and on others, it goes to what I was doing previously.

about a year ago
top

Here Come the Chromebooks, As Google and Intel Cozy-Up On Haswell

ultrasawblade Re:Interesting (139 comments)

Linux doesn't need a BIOS to boot off of. Windows does. Windows has all the dumb BIOS, UEFI and ACPI dependencies. Linux can use ACPI but certainly runs without support for it enabled. Windows versions starting with Vista won't install at all on a non-ACPI system AFAIK.

I run Linux on a Guruplug with the U-boot bootloader. And I know coreboot can directly load a kernel + initrd and hand over control like a good bootloader is supposed to do.

about a year ago
top

Tor Usage More Than Doubles In August

ultrasawblade Re:Great, that's how it's supposed to be. (186 comments)

The problem with putting this at the heart of the IP protocol is that IP needs to know the source and destination so you can communicate. If you want to obfuscate the source, it's more involved than what IP is tasked with.

IP is meant to try to get data from source to destination, with the absolute minimum info built in to support the notion of routing and subnets. Because it's called an internetworking protocol after all, meaning your traffic will traverse networks.

Anything else is not IP's job. Because IP is so simple it allows high performance networks to be built and expanded easily. When you make things at the IP layer complex, you get something like the phone network, which is hard to expand when needed. You want the core lean, mean, dumb, and fast.

about a year ago
top

German Government Warns Windows 8 Is an Unacceptable Security Risk

ultrasawblade TPM ... (373 comments)

I played around with some of the Linux TPM tools on a Dell system.

Seems like all that it's meant to be is a way to sign stuff with a key locked to a machine that cannot be retrieved unless you know how to read the nonvolatile memory of the TPM chip.

The whole remote attestation crap is handled by something else, Intel's TXT being such an implementation I think. That would seem to be the feature you want to stay away from, or NICs that have an integrated TPM and I presume something with TXT also available ...

And on this system I could tell the TPM to create a new, revocable EK, which to my understanding is the "root" key in the whole TPM scheme.

I kinda like it. What's the big deal about the TPM other than I'm sure it has a hidden debug mode that reveals the EK to whoever the manufacturer wants to give that ability to.

1 year,6 days
top

Book Review: The Internet Police

ultrasawblade Consequences .... (27 comments)

will never be the same.

1 year,9 days
top

The Steady Decline of Unix

ultrasawblade Re:Uh huh (570 comments)

QNX isn't a UNIX derivative at all. I think it has some POSIX compatibility stuff thrown in but it's not a unix.

1 year,9 days
top

Campaign To Kill CAPTCHA Kicks Off

ultrasawblade Re:Protection against drunk posting (558 comments)

How many unique such questions can you generate automatically?

Part of the advantage of a CAPTCHA based on random sequences of letters and numbers is that if done right it should be impossible to build a database of all possible CAPTCHAs and correlate them with anything the CAPTCHA generator creates.

1 year,22 days
top

Qualcomm Says Eight-Core Processors Are Dumb

ultrasawblade Re:The Onion said it best (526 comments)

Lol, you still had a parallel bus though, or channelized I/O or whatever you big iron types call it, not some CPU-driven molasses-based interface, right?

1 year,26 days
top

Qualcomm Says Eight-Core Processors Are Dumb

ultrasawblade Re:The Onion said it best (526 comments)

Yeah, with that super slow CPU driven bit-banged 3-wire bus connecting them and the 4K of RAM in the 1541 you could parallelize like it was 1899.

1 year,26 days

Submissions

top

Should floundering HTC start offering Windows Phones again?

ultrasawblade ultrasawblade writes  |  about a year ago

ultrasawblade (2105922) writes "Android is leading the marketplace, and that's a good thing ... for Google. Not so much for HTC these days. With its sales making up only 5% of new smartphone purchases worldwide, and Blackberry's recent offerings further adding competition to an already crowded and saturated marketplace, is Windows Phone a viable way for HTC to return to some semblance of its former (Windows Mobile-esque) glory? A quote from TFA: "Branching out and offering a line of Windows Phones would be a good start to get some diversification for HTC. They could put Windows Phone software on their existing hardware with few modifications, and should Windows Phone take off then HTC would be at the forefront of the Windows Phone success ..." Because it worked out so well for HTC when Windows Mobile was starting to get subsumed by iPhone and Android in 2007 ..."
Link to Original Source

Journals

ultrasawblade has no journal entries.

Slashdot Login

Need an Account?

Forgot your password?

Submission Text Formatting Tips

We support a small subset of HTML, namely these tags:

  • b
  • i
  • p
  • br
  • a
  • ol
  • ul
  • li
  • dl
  • dt
  • dd
  • em
  • strong
  • tt
  • blockquote
  • div
  • quote
  • ecode

"ecode" can be used for code snippets, for example:

<ecode>    while(1) { do_something(); } </ecode>