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Comment Re:Use case (Score 1) 247

Follow-up: Lenovo made this feature (battery charging not up to 100%) a hidden feature in their drivers and settings panel for Windows 8; it's only accessible by manual registry tweaking. Fortunately, setting the a new maximum charge state to 85% is persistent across reboots to Linux.

Comment Re:Use case (Score 1) 247

My corporate laptop is an HP, not a Thinkpad; . My private laptop is a Thinkpad X131e and it doesn't have this feature in BIOS/UEFI. I use Linux exclusively; it seems that this feature requires one to run a Windows program; there doesn't seem to be a Linux equivalent. I'll boot Windows some time and see if a change of battery-charging settings will carry over after a reboot into Linux, but I doubt it.

Comment Re:Noexec login scripts (Score 1) 165

I'm not sure what you're referring to, but .bashrc and .profile are sourced, not executed. I tested it again just to be sure:

# mount|grep homedata
/tmp/looptest/homedata on /tmp/looptest/mnt type ext4 (rw,noexec)
# su - sb-user
$ ls -la
-rw-r--r-- 1 sb-user sb-user 675 Jan 24 11:40 .profile
-rwxr-xr-x 1 sb-user sb-user 26 Jan 24 11:46 testscript
$ . .profile
$ ./testscript
-su: ./testscript: Permission denied
$ sh testscript
It runs!

Comment Re:Java (Score 1) 414

"That's not to say that there aren't any shit programmers who aren't Java programmers"

Too many negations in one sentence; my brain hurts. I think it means "maybe there are shit programmers in other languages than Java."...

Comment Re:Top 25 from my SSH honeypot-- (Score 1) 165

Do you do anything else besides logging?

I once set up an ssh honeypot in a chroot jail (with noexec and hardly anything in /bin; this was in 2005, before VMs were easy to run) to see what would happen; login guest/guest. Surely someone logged in, but they didn't attempt anything once inside. Maybe they were going to come back, but I didn't wait for it.

Comment Re:Use case (Score 1) 247

Well, a business laptop of EUR 1000 doesn't really count as a cheap DIY solution. And my employer-supplied laptop always charges to 100% when docked, as far as I can tell. Corporate IT has blocked user access to BIOS/UEFI, so I don't know what it can do.

Comment Re:Use case (Score 1) 247

"a more powerfull laptop ... has a built in UPS"

I once tried running an old netbook as server (dns and files, not routing) with UPS. When the power outage came, half a year later, it shut off immediately. Moreover, it didn't boot on its own when the power came back. With the lud closed, it was always kind of hot.

Apparently, Li-ion batteries need to be discharged every now and then to keep their calibration. The charging hardware seemed to think that the battery was fully charged while it was really empty. I've seen this happen as well with another laptop and a tablet.

Comment Re:Seems like time to consider the alternatives (Score 1) 146

"Keypass2 is a .Net rewrite that doesn't work well on ANY platform, and it's new format is not widely supported. The only decent feature that Keepass2 added was better multi-user support, which is pointless for most users anyway. Go with Keepass1."

As for the leading Android implementations, keepass2android is definitely better than keepassDroid. They use the same database format (kdbx). However, KPD does not black out its thumbnail in the recent-apps list, does not have the same features for auto-locking the database, and does not warn about clipboard snooping attacks. If someone grabs your phone, you're at more risk with KPD than with KP2A.

Comment Re:Cork?? (Score 1) 116

"Also, plastic clamshells tend to hold up okay when dropped"

All my laptops suffered from material fatigue in the case. Three times a crack on the right of the keyboard (from holding it with one hand), two with a severe crack on the back of the screen, near the hinges. I would welcome a small laptop (11-12 inch) that really lasts. Although among them were a 14-in Thinkpad T23 and a 14-in Dell Latitude, so it weren't just ultraportables.

Comment Re:Oh yeah! (Score 2) 175

And why you compare the pressure of He inside, to the partial pressure of He outside is beyond me.

Because the pressure of He inside is equal to the partial pressure of He inside.

Unless the pores in the balloon have diameters that are much larger than the mean free path length (about 50 nm at atmospheric pressure), the absolute pressure doesn't matter for the leak rate, only the partial pressure. I doubt that balloon rubber has pores that large, but it could be. Even in the likely case that the pores are small (<100 nm), the pore size may shrink as the balloon deflates, which will depress the leak rate more than what can be explained from the change in membrane thickness.

Disclosure: I am a vacuum engineer. If you don't believe it, then I suggest that you read up on the concepts of Knudsen number, Fick's law, and permeation.

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