Archive for the 'Hardware' Category

NEC MultiSync PA241W MultiProfiler

Thursday, September 22nd, 2011

Some time ago I got a black NEC display which comes with four video inputs: VGA, 2 DVI and even DisplayPort as well as USB hub with two upstream ports. As I found no setting available on the monitor to change the USB upstream port to use, I usually just changed the USB cable when I had another computer for some testing on my desk.

However, today, I found out that there is a NEC MultiProfiler setup utility which allows to permanently assign dedicated USB ports per video input. This way I finally got a full KVM switch inside the monitor, assigning the first USB port to the DisplayPort, and the second USB port to all the other video inputs, used for temporary testing of various stuff.

BlackBerry PlayBook aint’t too bad

Wednesday, September 14th, 2011

Just gave it a quick spin at a local store. quite nice so far, know and worked with QNX since the mid 1990s. But how the heck to you get out of an App, e.g. back to the home screen? Tried all kind of gestures, touched everywhere - nothing intuitiv worked :-(

Update: Aha - touch sensitive bezel: swipe on the border, …

Note to self: display EDID

Tuesday, September 13th, 2011

ioreg -lw0 | grep EDID | sed s/.*=\ .// | xxd -p -r | strings -6

B… = AU Optronics
LT… = Samsung
LP… = LG / Philips
N… = ChiMei

Update: Can be used to check if a Retina MacBook Pro contains an LG display, apparently at times showing image retention / ghosting effects when the same pixel pattern is shown for some time, such as Safari website text, Apple Mail, or Xcode source code or word processing and similar high contrast patterns, …

Regress in computer displays

Friday, September 2nd, 2011

So for some time now I’m searching for the perfect ultraportable (laptop). Tables do not really cut it, even got an iPad to test things, but productivity wise they are not too great to get things done. As I need to get things done, I require some kind of grown up notebook. All the latest Apple machines are not too pleasing either, either cold (on power-up) and too hot during use hard edged aluminum case, and glossy window glass mirror displays, … not to mention the ridiculously huge and space wasting MacBook Air screen bezel, …

The Lenovo X220 is not all that perfect either, same lagging Intel graphics (among others no OpenCL, …) and additionally I just noticed a setback in their display configuration:

The former X200/X201 spotted a 12.1″ 1280×800 display, and it’s ultra-portable cousin X200s/X201s even featured a: 12.1″ 1440×900 (PDF) - now with the “all new” X220 even the Premium HD display only features a mere: 12.5″ 1366×768 pixels, … (PDF)!

This is not only a lower dpi resolution (pixels per inch), it also cuts away enough vertical pixels to make it seriously less useful for professionals with remote screen sessions, and virtual machines. More than the last millennium’s 786 vertical pixels (remember when 1024×768 became standard?) really are a blessing when you want to have your operating-system’s menu bar, and window deco around your windows and generally avoid scrolling in your VNC, RTP, X11 session or virtual machines.

Doing some research on this topic I also spotted that the X220 IPS screen appear to have some ghosting issues, …

Dear manufactures: I do not need a professional computer (display) optimized for consuming cheap Hollywood (or Bollywood) movies. If the mankind is supposed to live on some more centuries, we certainly also have to get some work done, not just hang on to consume other’s stupid videos all days. And even for consuming a decent movie every now and then, I’d get myself a decent TV for that. And with 16:9 LCD TV’s I noticed most high quality movies, on BluRay and such, are not even 16:9, but more like 21:9, …

So, can we please get professional grade, matte, 16:10 display, with at least 800 vertical pixels back to get some serious work done?

Unlock your MacBook Air Recovery USB drive

Monday, August 22nd, 2011

So you got an “older” (pre 2011) MacBook Air with read-only USB recovery thumb-drive (stick)? Well, turns out it is only read-only by some firmware lock bit. Just run:

sm32Xtest.exe

On your favorite Windows (virtual-) machine to toggle the read-only bit. You now can use it for your personal data, or writing the Lion installer disk image to it to gain a Lion Recovery USB key, just as you like.

Vintage car get-together HefeHof Hameln 2011

Monday, August 22nd, 2011

Yesterday, my father and I have been to the vintage car gathering (Oldtimer-Treffen) at the HefeHof, Hameln (Germany). Starting with nice sunshine I got some great shoots to share:


… more in the whole gallery

The quest for a new headset - Denon AH-C560R

Sunday, August 14th, 2011

Since the 1st generation iPhone I enjoyed using some V-moda Vibe in-ear headset. At the time the V-moda Vibe was one of the first iPhone compatible headsets with microphone and good sound quality.

Unfortunately, as usual, the cable started to break just over the TRS plug’s bend protection. Attempts to save the headset by soldering a new 4 pin TRS plug proved a little difficult: soldering the tiny 4 pin ⅛ inch TRS connector is possible, but the fibre enforced wires make it pretty difficult. One has to carefully separate the fibre out of the copper, and even then getting solder onto the paint isolated copper wires is a tedious task. And all too often have signal crosstalk problems in the end, due to the now heated and dissolved isolating wire coat, … especially interfering the (i)Phone’s microphone ring detection, often leaving the microphone and remote button controls unfunctional. Often it even works at first, until the cables are cramped into the connector when the plug is screwed together.

In the end I decided to better just get new set and started an endless Google search and local shop listening test. I found most offered headsets either plain ugly (sorry folks!), or excessively overcharged, especially when lacking in sound quality. Some models from the German company Sennheiser would have been a nice choice - if just their cable control with microphone plastic enclosure would be more visually appealing.

Especially lacking where the excessively overpriced Shure SE535 and friends. For over 300 bucks the advertised musical professional headphones can not please my musical amateur sense of hearing: For one in a local shop listening test they failed to deliver any bass (low frequencies) to speak of at all, … and thus an extremly unbalanced frequency range overall.

In the end of the lengthy selection process (why can manufactures not just design, build, and sell the one perfect headset?) I ended up with a Denon AH-C560R. They do not only look very good, with their minimal, no-frills design (that could be out of Cupertino), for just about hundred bucks they deliver an well balanced frequency range, with definitely more bass compared to the expensive Shure series.

Of course the Denon also sounds way more balanced than the over 3 year old V-mode Vibe - maybe due to Denon having more audio design experience being a well known audio brand for many centuries. The V-mode had more bass, though - but overall the Denon sound more balanced, with clearer mids and highs. (Other reviewer would now go all lengths over starting to hear all sort of details, percussions, accents not being possible to hear with another headphone before, …)

Oh, by-the-way, I also found the Nox Audio Scout headset’s design VERY appealing, I even delayed the purchase some months to wait for their release, … However reviews, such as the one from Engadget where not too keen about their audio quality, and given that they are (still not) yet sold in Germany the shipping costs from the US where just too heigh to rectify trying them out myself, … Maybe I grab them for cheap when I am in the US the next time.

It will also be interesting to get a ear on the Bowers & Wilkins C5 - though I am not too sure if I will find such a huge & heavy tube comfortable.

Apple Macs and thermal throttling

Saturday, August 13th, 2011

Since Apple migrated to the energy-hungry Intel x86 CPUs some years ago Macs got quite some overheating, thermal throttling issues. For example you will find many compact aluminum Macs to become so hot, that you would barely want to touch, or use on your lap, with the miniature fans spinning at full pace.

The bad is that Mac users typical will not even notice that the (Intel) silicon will even start to emergency throttle down. They will only notice the machine becomes less “snappy”. Linux on the other hand will happily log the MCE to your syslog instead:

CPU0: Temperature above threshold, cpu clock throttled (total events = 794)
CPU0: Core temperature above threshold, cpu clock throttled (total events = 1)

If my aging, non-unibody, MacBook Pro would not throttle that much it would still be a perfectly reasonably powerful machine to use - even as professional. But as it became so annoying I decided to write a little benchmark too that logs the performance over time. When freshly booted this MacBookPro3,1 will start to throttle down after just a minute! And you will notice another spike of throttling where I started another benchmark instance on the second core, …

However, I think when I purchased the machine back in 2007 it was not that bad, I have the feeling it became worse when Apple exchanged the logic board due to the faulty, and failing NVidia chip, … maybe something (fan, heat-sink or -pipe) was not re-aligned perfectly, or too much thermal paste applied, …

I experienced this throttling with all MacBooks and iMacs in the last years. I just tested the latest (mid-2011) MacBook Air at a local shop which thanks to the Sandy Bridge Core CPU does finally not show this symptom that badly. They intentionally choose the lowest performance Ultra-Low-Voltage CPU for a reason, … Though thanks to the advent of Intel’s Turbo Boost it shows fluctuating performance levels, too. One could argue it is an publicly advertised thermal throttling feature :-)

Whether due classic thermal throttling, or TDP (Thermal Design Power) based Turbo Boost: for researchers this means any such CPU is out of question for scientific performance measurements. A fixed-frequency CPU without funky throttling and boosting as well as a BIOS’ SMM (System Management Mode) not interfering (too much) is a must. Unfortunately, the later is hard to prove and avoid, though.

VIA Nano QuadCore (X4)

Thursday, May 12th, 2011

So VIA now enters the game of many-core with the VIA Nano QuadCore.

Unfortunately, however, the dual-core VIA Nano X2 did not yet even made it to the market. The VIA Nano already was years late, and so is the X2. I guess this time they may ship the QuadCore sooner, because it mostly consists of two X2 dies, which will probably help to start shipping the X2 and QuadCore in a similar timeframe.

Without all these delays, or slow development –whatever you want to name it– I’m sure VIA would have been more successful over the last years. This way Intel and AMD could get into the lower-power market easily, and quickly. And this while Intel’s Atom is only deliver an “abysmal” year 2004 Transmeta Efficeon performance.

The X2 and QuadCore thermal design power (TDP) is not that low either, 25W for the fastest X2, and 27W for the (lower-clocked) QuadCore + ~5W for the chipset and graphics. AMD’s Fusion E-350 runs at 18W, while the C- and G- series are down to 5W-9W, including the memory controller and graphics: Fusion.

VIA will continue to have a hard time competing against AMD’s high-performance, low-power offerings, as well as Intel’s less-performing either lower-power (Z-series Atom) or higher-power regular Atoms.

PS: What surprises me in Anandtech’s report is, that VIA Centaur is running their simulation cluster with Intel CPUs. I certainly would not feed my competitor, and instead rather use my own CPUs. This would not only thoroughly stress test them, but also motivate the engineers to develop performant next-gen chips, … And: You seriously expect other cloud folks (Facebook, Google, et al.) to run clusters of VIA CPUs if VIA is not even doing so in-house???

Where are the pretty PC laptops?

Thursday, March 17th, 2011

My main “workstation”, a 3 year old MacBook Pro, is really reaching the point where something slightly snappier would be nice. As I also use Linux a pretty PC laptop would be sufficed, too. Especially as I do not 100% fall in love with the latest unibody Macs, anyway (I would take a black liquid-metal incarnation, though, … ;-).

With the advent of neat silicon from AMD there should be plenty of slim, light and long battery life PCs, but there aren’t, … :-( The only thing one could barely consider was the previously expensive, and now discontinued Dell Adamo, … With this good design vacuum it is no wonder Apple is selling that well, …

I could consider the new Lenovo X220, the IPS display is certainly appealing, but where the heck is the ultra-portable, slim & light S-series edition of it?

Oh my, guess I have to wait even longer, and if the PC industry continues to fail with good designs, I can just hope to see some nice liquid metal, black & beautiful Apple laptop in a year (or so), …