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Comment Some hints (Score 1) 100

I have a few suggestions for people, having used computers from a very young age and having my own since 7th grade, eye strain has always been an issue.

(1) If you are near sighted (which I am), have your the prescription *slightlt* detuned, so it isn't perfect. Mine is detuned by I think around 0.25. This reduces eye strain by a HUGE amount. You won't be able to read highway signs from far away but who needs to do that any more with gps nav?

(2) Tinge your desktop foreground coloring scheme more towards the greens and do not yet a dead-black background solid, and do not have a bright background picture relative to your windows. This reduces excess contrast while simultaneously allowing you to reduce the brightness of the screen. Excess contrast is a major source of eye strain. If you see characters burning into your retina excessively you have too much contrast.

For example, for xterm's I use the following resources:

xterm*background: #100010000000
xterm*foreground: #7FFFDFFFDFFF
xterm*cursorColor: white

(3) Monitor(s) should be arms-length from your eyes with your fingers stretched out. If they are any closer, you are doing something wrong. Any closer and your eyes will get strain for excessive crossing.

(4) Glasses vs Contacts. I don't know. I prefer glasses myself, but I've never really liked to use contacts so mostly I just don't any more... its glasses all the way.

-Matt

Comment Re:PKI? (Score 1) 26

Worse than that; in all likelihood.

While adoption has been patchy; the 'trusted computing'/TPM guys definitely have what it takes to deliver a cryptographically locked bootloader and a variety of other powerful-and-somewhat-creepy capabilities; so anyone who gets onboard with this will presumably move from shipping hardware with shitty firmware that doesn't get patches to shipping hardware with shitty firmware that doesn't get patches and cannot be fixed or replaced even if you have the requisite expertise with that platform. The sort of 'support' that bootloader locked android devices get now. Far too insecure to be remotely safe; far too secure for mere mortals to reflash the firmware with something else without a particularly elegant 'trustzone' compromise or hardware attacks.

I hardly mean to suggest that OpenWRT will save IoT or anything(IoT needs a lot more saving than is probably possible for anyone; and vendors are spitting out unsupported hardware far faster than 3rd parties and mainline kernel support can catch up); but if you think shoddy firmware is bad; it's hard to get excited about shoddy firmware that is effectively impossible to replace even for devices based on well supported hardware.

Comment Re:vGPU seems cool (Score 5, Informative) 90

My understanding is that it is more extensive: PCI(mostly 'e' these days) passthrough allows you to assign a physical device to a VM; but the device can't be shared: if a given piece of hardware is being passed through to one of the guests, none of the other guests or the host OS can use it.

This 'virtual GPU' stuff is supposed to make allocating GPU resources between VMs closer to how it is with CPU time or memory, where all the guests and the host can't exceed the capabilities of the machine they are running on; but they can all have access, with relatively modest overhead, to the same device.

I don't know if things work as pleasantly as desired yet; but in principle it should be a lot more convenient than full device passthrough. Especially in cases where you might be interested in the GPU for its computational capabilities, video transcoder, etc.

Comment Re:Why not blame the manufacturer? (Score 2) 260

If you think that finding a vendor that doesn't keep cutting battery life/SD card slots/headphone jacks/basic safeguards against electrical fire in order to make it thinner, cheaper, or both is hard; just try to find one that ensures sufficient borated polyethylene(with something else to sop up the resulting gamma rays) or other neutron shielding into their products.

There probably are some, making bits for nuclear reactors and industrial, scientific, and medical users of neutron sources; but it's a niche.

Comment Re:LibreOffice? (Score 5, Informative) 121

You can definitely embed Windows Metafile images in LibreOffice on Windows; but I'm not entirely sure if that is enough to make it vulnerable. WMF is dangerous because it is basically a package of GDI function calls, which might be good for efficiency or compactness; but has led to a number of creative and executable things being shoehorned in(as in this case; and repeatedly over the years).

However, there are several image handling libraries that can render or convert WMF images without access to GDI; so in those cases GDI bugs wouldn't be a problem(though you probably have other things to worry about).

This Libreoffice VCL documentation suggests that LibreOffice uses its own VCL WMF filters; but I sure wouldn't bet anything remotely important on that without testing it first; or knowing rather more about how LibreOffice is put together.

Comment Re: Makes sense. (Score 1) 109

Keeping the rats and fungi at bay can be tricky; so long-term survival is only assured in optimal cases. That said; the fact that ancient-recipe booze tends to be aggressively unfiltered by the standards of even the most yeast riddled modern variants quite possibly has something to do with the fact that you definitely lose calories if you do the filtering and clarifying necessary to get the 'suitably tinted; but otherwise optically clear' results that are currently favored.

You can recover at least some of the losses if you feed fermentation byproducts to livestock, use them as fertilizer, etc; but if hunger is a real constraint the fact that there's effectively bread sludge suspended in your beer starts to look more like a virtue than a defect.

Comment This seems pretty dubiously useful. (Score 4, Insightful) 142

This seems like a rather touchy solution looking for a problem.

Unless you really enjoy buying replacement hardware; the need to have battery power in order to trigger the kill switch is a problem. If you don't configure the device to self-destruct when its battery is on the verge of no longer having enough energy to perform a self destruct; all the attacker has to do is run the battery down. If you do configure it that way, forgetting to put it on the charger could get expensive and tedious rather fast(in addition to the various other issues that can interrupt battery power: overtemp protection kicking in in a hot car; current delivery capability falling under freezing conditions, etc.)

Plus, the battery, and its connection to the logic boards, tend to be among the larger and more obvious parts of a modern electronic widget. That makes them good candidates for controlled disconnection/destruction, even if you can't open the case without tripping some sort of anti-tamper mechanism.

Finding a good self-destruct temperature is also a bit tricky. The lower you go, the closer you get to the high end of normal operating conditions or the 'device won't operate; but should not be permanently damaged' range. 80 degrees is high for flash memory; but most CPUs will be happy enough to run that hot. The higher you go; the more power you need to be able to deliver to kick off the destruction; and the more vulnerable you are to an attacker who is able to apply coolant to slow you down; limit current or voltage delivered to the resistive heater, or both.

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