Archive for the 'Hardware' Category

The different kinds of Wake-on-Lan

Sunday, September 24th, 2017

Some time ago I posted about wake on lan being hidden by a cryptic energy BIOS option. This week I was setting up a new test system and wondered what exactly the Linux ethtool:
Supports Wake-on: pumbg
letters actually meant. The man-page is help and it actually is quite simple and logical:

p Wake on PHY activity
u Wake on unicast messages
m Wake on multicast messages
b Wake on broadcast messages
a Wake on ARP
g Wake on MagicPackettm
s Enable SecureOntm password for MagicPackettm
d Disable (wake on nothing). This option clears all previous options.

Apple continues to overcharge EU customers

Wednesday, September 13th, 2017

So the new iPhone-X was just announced, let’s take a quick look on the pricing: $US 999, which does not include tax. So let’s divide this by the current $US/EUR exchange of 1.20, and adding 19% German VAT:

999 / 1.20 * 1.19 = 990,675 EUR

To be on the save side they could round this up to 999 EUR-
And what is Apple listing on their Apple Germany website?

1.149 EUR !!!

Thanks but no thanks. I do not need to be ripped of and overcharged to maximize profits and subsidize the US market.

Update: Apple is basically calculating with an currently very far off exchange rate of 1.0338 !
999/1.0338*1.19 = 1149.94…

I would rather prefer they use actual exchange rates, and instead adapt prices if necessary. As they did before in Europe, Russia, Brazil, and elsewhere, ..!

Update 2018/3 In the meantime the EUR hit 1.24, which would result in a German retail price of 958,72€ incl. the 19% local VAT, ..!

hey, ALSA’s arecord has a vu-meter

Friday, July 14th, 2017

who knew?

arecord -f cd -d 0 -vv /dev/null

;-)!

Lenovo ThinkPad T470s

Monday, July 3rd, 2017

I never owned a ThinkPad. My first PCs were built from components, and my first PC laptop was a noname. Then I got into Linux and non-x86 architectures, and as student worked on ARM, SPARC, PowerPC, MIPS. Probably in that order. Given that path of education, my second laptop probably was a G3 iBook - which I obviously run with Linux for the flawless suspend / resume at that time (2003?).

Nowadays I’m more and more disappointed by Apple’s offerings. Few ports, uncomfortable keyboards, too large trackpads, glossy displays to name a few. On the PC side there are so many cheap, but low quality options that it takes a bit or research to find your perfect fit. However, choice is good, and you could opt for a much cheaper model in case of.

One of the more outstanding, higher quality options are Lenovo ThinkPads. Purchased from IBM in 2005, they may still be the only laptops certified for use on the International Space Station.

Lenovo Germany was so kind to send me the 14″ T470s for a test.
(more…)

This annoying Sony camers w/ AVCHD files

Monday, June 12th, 2017

To process them in Linux install fuse-exfat, mount the SD with:

mount.exfat-fuse /dev/sdb1 /mnt/

and convert the properitary container to a standard one:

ffmpeg -i /mnt/PRIVATE/AVCHD/BDMV/STREAM/00001.MTS -codec copy myfile.mp4

Changing the Ethernet Mac address

Wednesday, June 7th, 2017

For fun or for profit:

sudo ifconfig en0 ether eb:ec:4a:9a:1e:b8

Of course choose your own truly random hex numbers ;-)

Dell XPS 13 9360 Developer Edition

Monday, April 10th, 2017

Last year Dell was so kind to send me the Intel Skylake based 15″ XPS 9550. As expected Dell recently refreshed the XPS series with the Kaby Lake generation of Intel’s platforms, and I could take a look on the refreshed silicon in the 13″ form factor.

The 13″ edition comes with the same light and sturdy carbon fibre, with a gentle silicone surface. As mentioned in last years post I like it for the thermal and electrical isolation. The same infinity edge display still optimises the size of the case, so that the 13″ display is effectively packed into the size of a conventional 12″ laptop. A really welcome light and compact travel companion.
(more…)

Latest Mac’s build in hardware test

Wednesday, March 1st, 2017

Historically there was an Apple hardware test that you could boot to check if your Mac’s hardware is all good.

It came to a surprise though, that with newer Macs simply holding the ‘d’ during power on it runs some simple hardware diagnostic, too.

One should probably more often read Apple’s support pages, ..

Oqo 01 power adapter pinout

Friday, February 3rd, 2017

I got a nearly unused Oqo 01+ a few years ago for my vintage computer collection. You know, because it has “rare” Transmeta Efficeon cpu in it. As the original power supplies are apparently prone to fail, it already came without a power supply and I had to always use the lab supply on my desk (don’t ask, just the usual computer scientist office desk ;-)

Back in the day I found a bloodspot.com post form Ekawahyu Susilo, were he measured the pins - however, given the usual bitrot in the interwebs the post is now gone, and I peeled the most useful photo out of the archive.org to archive it prominently here as well:

(1) is VCC1, (2) is GND, and (3) is VCC2. Pin (4) is connected to GND and pin (5) is connected to VCC2. As far as I have found, VCC1 (5-6V?) is used for charging, while VCC2 (may be better lower at just 5V?) is used to directly run the Oqo, …

Update: now with video! ;-)

TEAC HR Audio Player for iOS

Thursday, January 5th, 2017

This thing, when you buy a Teac HA-P50 for some Hi-Res Audio testing, and the matching iOS app (you know, for hi-res, FLAC and such, …, sigh) produces extremely audible clicks and pops that sounds like buffer under run / overflow / whatever - on a recent iPhone 6s no less.

What the heck are the vendor’s thinking to ship such crap to their premium paying customers?

Funny thing, other apps, such Apple’s own Music.app do not have this clicks and pops, … ???!!!

Judging from the App review an at least one year old problem:

PS: And why the heck do they sell the Teac HA-P50 for US$199 in the states, and for 299€ in Europe?