Archive for January, 2010

Is the iPad good for Linux?

January 29, 2010 6 comments

Regardless of how severe limitations Apple imposes on the iPad, we can expect it to be reasonably successful. I don’t think it will duplicate the success of the iPhone but due to Apple’s strong marketing and its own technical merits, it will sell in significant numbers.

How will this affect Linux and the upcoming tablets based on it?

When I say Linux, I mean Google’s Android and Chrome operating systems as well because they are all based on Linux.

I believe the iPad will have a positive effect on Linux adoption. The bigger its success will be, the bigger help it will provide to Linux. Now, I agree that this sounds controversial first, because the iPad runs Apple’s own iPhone OS which is a competitor to Linux but the logic gets more obvious if we think about the biggest hurdle for Linux adoption: compatibility with Windows.

When buying computer-like devices, people still expect compatibility with Windows and windows applications. Microsoft’s monopoly of the desktop makes it hard for alternative OS-es to make headway. The iPhone made a dent in this cornerstone because it proved that it can serve as a viable, ultra-mobile internet device, a role played by, overwhelmingly, Windows laptops before. The iPhone created a huge ecosystem of software developers/publishers completely independent from Microsoft and Windows. The iPad will continue this trend and will highlight this market in a much more meaningful manner.

People buying the iPad will be aware that their device will never run Windows programs yet they will buy it anyway. Their example will further destroy the myth that a computer needs Windows to serve useful purposes. The iPad, due to its size, is more of a “computer” in the eyes of the people than an iPhone, regardless of the technical similarities.

After the iPad successfully lowers resistance to non-Windows computing devices, Linux will have a much better chance of competing in the mobile computing market and, eventually, on the desktop.

Categories: gadgets, linux, ubuntu

Apple’s iPad vs Notion Ink’s Adam tablet with Ubuntu: battle of two worlds

January 28, 2010 70 comments

We can safely say that the Apple iPad is received with mixed feelings by the IT-savvy community. The main problem is that the tablet is just not as revolutionary as many expected it would be. It keeps many of the limitations of the iPhone (no multitasking, tightly controlled app-store) and doesn’t provide impressive new features which could keep the balance.

Let’s compare this tablet to one of the more promising Tegra 2 tablets on the way to the market: the Notion Ink Adam. Admittedly, the Adam is not on the market yet, while the iPad is quite sure gets there soon. Nevertheless, we give the benefit of the doubt to Notion Ink (especially, considering how badly Nvidia wants to start the Tegra 2 device line). In my comparison, the Adam runs Ubuntu Linux with the Mobile Edition which has a touch oriented user interface. The first version of the Adam is expected to come with Android but since Nvidia officially supports Ubuntu on the Tegra 2, we can expect a fully working Ubuntu edition on the Adam soon enough. Moreover, for such powerful hardware as the Adam, even Android seems limited to me.

Screen technology and diplay features

Both the iPad and the Adam have ~10″ LCD displays with capacitive touchscreen technology. However, the Adam features PixelQi technology which means lower power consumption, direct sunlight readability and higher contrast when switched to BW mode for reading. The Adam will have a hardware switch for easy mode-changing (BW/low-power colour/full colour) which will help lowering the power consuption (like a wifi or 3G radio shut-off switch). The iPad doesn’t seem to have any hw switch, not even one for adjusting the brightness of the screen (meaning: unless there is an ultra-easy touch gesture for it, nobody will adjust the brigthness for ambient light conditions). The iPad specs page lists an ambient light sensor, so the OS may be able to automatically turn-down the backlight when not needed but this won’t save you as much as the power saving modes of the PixelQi screen. All-in-all, the screen of the Adam seems to be more versatile and power efficient.

Processing power

The custom Apple A4 processor of the iPad runs at 1Ghz and is a single-core ARM Cortex A9 solution. The Tegra 2 of the Adam features 2 Cortex A9 cores running at 1 Ghz. Due to the exact same technology platform, I expect the Adam almost two times as powerful as the iPad and this should be very much noticable in the more important applications (e.g. web-browser). The iPad has the stock ARM Mali 50 graphics core, while the Tegra 2 includes a Geforce 9 level graphics core. Although, I am not very familiar with the capabilities of these cores, I expect the Nvidia core to be more powerful since this is where Nvidia has strong competency. Some say the Mali core is not even in the same league as the Tegra 2 graphics core but this remains to be seen. (Disclaimer: it is possible that current reports about the inclusion of the Mali are inaccurate and the iPad uses a PowerVR graphics core like the iPhone).

GUI/desktop enviroment

The iPad runs the GUI environment of the iPhone OS (an OS X derivative), while the Adam runs Ubuntu Mobile (at least in my comparison). The Adam may not support multitouch in the short term but already has support for gestures (e.g: a swipe for moving to the next image in the image browser). The iPad supports multitouch and a wide array of gestures. I expect the iPad GUI easier to use and more refined (at least for the time being, since Ubuntu Mobile is quite a young project).

The “desktop” is easy to use in both environment, very similar application startup and indicators. The Ubuntu OS will run several applications in parallel while you will be able to use only one app ata time on the iPad. (see about  this later)

Web Browsing

The iPad doesn’t run Flash but said to render normal webpages snappily in its custom Safari browser. Youtube is supported just like on the iPhone but no Flash games and no Java applets in webpages (see about interpreters later in the application section).

The Adam will run full editions of Firefox/Chrome/Opera and expected to have an optimized Flash version (Flash 10.1 coming soon) so it will be good for running web-pages with video streaming and Flash games. Java applets (rare nowadays) will work too.

Playing video / Listening to music

The iPad has no HDMI output (has a simple VGA output, max res: 1024×768) and is rated for decoding 720p videos. This is a far cry from the 3 simultanious 1080p streams of the Tegra 2 and built-in HDMI port of the Adam. The Tegra 2/ Adam offering is far more powerful and makes the Adam a viable HTPC if you want to play the movies from your tablet onto your HDTV screen.

Both have a 3.5 mm jack and speakers so hw-wise, listening to music should not be a problem. Ubuntu has powerful music player applications which are on par with iTunes of the iPhone/iPad.

Playing games

The Geforce graphics core of the Tegra 2 in the Adam will be quite sufficient to play 3D games. The performance of the Mali 50 is not widely known at this point but is not expected to be worse than the graphics core in the iPhone 3GS so it is likely able to run 3G games like the demo based on the Unreal engine. I expect the Tegra 2 graphics core of the Adam  more powerful.

Camera / video chat / VOIP

The iPad doesn’t have a built-in camera which is a glaring omission. The Adam will have a 3Mp built-in camera, which is more than enough for Skype videophoning. Moreover, the Tegra 2 supports real-time hardware encoding of 1080p streams to H264 so, properly written video-chat applications should work extremely well on the Adam. Ubuntu should run any Linux VOIP app compiled for ARM. I expect Skype and other open/closed source software work well on the Adam in the short-medium term.

Apple has recently lifted the restrictions on Skype and other VOIP apps in the iPhone app catalog so the iPad will have the voice part OK but you will need an external cam for video chats and currently there is no information on the video encoding capabilities of Apple’s A4 SOC.

Battery runtime

The iPad is rated for 10hrs of use (wifi browsing). The Adam is specified to have 16 hours of wifi browsing. The Adam looks like the winner here but the iPad’s 10-hour runtime is also quite good.

Ebook reading

The Adam’s PixelQi screen supports this activity much better especially in sunlit places. Ubuntu runs FBReader (my favourite ebook reader software) and has viewers for every kind of complex-document formats (most of them will be displayed in Evince, in case of Ubuntu). The iPad has a new reader application which is too early to write about but expected to be an intuitive reader-app (if the track record of Apple is any indication).


Both devices include GPS units, so navigation software should be available for both. Google Navigation will certainly run on the Adam, I just hope it doesn’t get blocked from the iPad app-store.

Other applications, Multitasking

While the iPhone has a huge selection of applications in Apple’s app-store, most of them will have to be tailored for the iPad for full potential. This will surely happen if the iPad becomes successful but it may happen slowly if the device proves to be less than a clear success. Application-wise, I expect the Apple iPad to be as closed as the iPhone, so you will be able to install only Apple-approved applications from the official app-store.

Ubuntu on the Adam can run any full-desktop or command line Linux/ARM software from the Ubuntu ARM repositories. This is a huge selection of software and includes powerful applications like OpenOffice, GIMP and others. These may not be optimized for the touchscreen interface but the Adam’s backside trackpad can help using them in tablet mode and in docked mode you will be able to use a USB mouse and keyboard just like with a netbook. Moreover, Ubuntu is completely free of limitations so you will be able install whatever software you want.

The iPad currently has multitasking disabled so you can run only one application at a time. The Adam has the full multitasking of Linux. The Adam’s dual-core hardware should run several applications efficiently in parallel. A good use-case for this: a Bittorrent download running on your Adam while reading an ebook (I do this quite often on my OLPC XO-1).

Apple doesn’t allow applications running in interpreters so you will never run a Flash/Java/Python/.Net-Mono application on the iPad although the hardware is sufficient for them. The Adam’s Ubuntu will run any of those applications without any restrictions. Flash 10.1 is expected to be optimized for ARM SOCs and Java 6 has an optimized version for the Cortex A9 processors so the Adam should run apps based on these technologies well. Desktop and Webstarted Java clients are quite common in the enterprise IT world so the Adam may get some love from there.

It is not yet known how much RAM the iPad or the Adam has, but based on the Tegra 2 development board, the Adam will have at least 1 Gb of RAM which is quite sufficient for running even several complex applications in parallel.


The Adam will have expandable storage by a microSD slot, while the iPad seems to have no storage expansion slot at all.


The cheapest version of the iPad is announced for $499 in the US. The Adam is expected to carry a sub-$400 pricetag ($320 is a current estimate).


The iPad hardware seems to be seriously lacking when compared to the Adam’s Tegra 2 foundations, PixelQi screen, trackpad and other features.

Application-wise, the playground is more leveled but for Linux-savvy people the choice is a no-brainer. The iPad will certainly appeal to people who want devices which “just work” and accept the serious, artificial limitations imposed on their device.


iPad specifications  by Apple

Ubuntu Mobile Edition

Categories: gadgets, linux, ubuntu

Tegra 2 supports Ubuntu Linux

January 11, 2010 10 comments

Notion Ink's Adam tablet, based on Tegra 2

According to this faq-like post on the official Nvidia Tegra developer site, Ubuntu Linux is supported as an operating system for Tegra 2 based devices.

This is extremely important for both Nvidia and Linux in general since a lot of IT-savvy people find Android insufficient for the netbook form factor and ask for a “real” Linux on these very promising devices.

I tend to agree with this view primarily because Tegra 2 @1Ghz is a powerful SOC for a smartbook/netbook/tablet which can run a full desktop Linux with decent speed. I see no reason to limit Tegra 2 based systems to inferior operating systems like Android or Windows CE (bah). As an example, Windows CE 6.0 supports only 512Mb RAM and only one processor. Since the Tegra 2 has two Cortex A9 cores,Windows CE will not be able to utilize both. Android has no X-Windows on it so it cannot run normal Linux software, only software directly written for Android. In contrast, Ubuntu for ARM supports multiple processors, any reasonable amount of RAM and most of the popular Linux software can be installed readily  from the Ubuntu ARM repositories, and even the more obscure sw likely requires only a recompile.

A simple Gnome desktop or Ubuntu’s Netbook Remix user interface may not be perfect for a touchscreen operated tablet but is very useable with the traditional laptop form factor. Some of the Tegra 2 tablets will add a pointer device as well, in addition to the touchscreen (like the Notion Ink Adam) so these machines will be easy to use with a customized, full Linux desktop.


The list of currently known Tegra 2 tablets/smartbooks.

Some performance comparisons between Cortex A9 (like the Tegra2) and Intel’s Atom:

Categories: gadgets, ubuntu, Uncategorized

Nvidia leading the smartbook revolution?

January 8, 2010 1 comment

Seeing the CES product announcements poouring in, one thing stands out clearly: a boatload of new tablets, media devices and smartbooks are based on Nvidia’s new Tegra 2 system-on-chip (SOC).

The most notable ones:

  • The Boxee Box media player
  • The MSI 10″ Android tablet
  • The Compal Android tablet
  • The ICD Ultra and Vega tablets
  • Mobinnova Beam WinCE smartbook
  • Notion Ink Adam Android tablet
  • Audi future car navigation system
  • ASUS Eee Pad tablet
  • Pegatron Neo smartbook
  • ViewSonic VTablet 101

The flood of Tegra2 products doesn’t come to me as a surprise since the technical capabilities of the SOC has been known for a while and is considered impressive. The chip contains 2 ARM Cortex A9 cores running at maximum 1Ghz and other cores for graphics, audio and HD video encoding/decoding.

While most of the currently popular ARM based devices contain Cortex A8 level cores, Nvidia seems to be ahead of others in the ARM ecosystem by quickly designing and implementing a dual core A9 solution.

Device designers/manufacturers seem to be appreciating Nvidia’s efforts judging by the number of devices announced for the platform.

Intel may have made a big mistake by alienating Nvidia from the Atom architecture by denying information about the hw interfaces. Although, Ion 2 has been announced, Nvidia’s focus is clearly on Tegra now and that may result in some very serious competiotion to Intel’s Atom.

Categories: Uncategorized

Cortex A9 dual-core vs Atom demo side-by-side

January 6, 2010 2 comments

Earlier, I wrote about the relative performance of Intel’s Atom and the upcoming smartbook processors based on ARM’s Cortex A9  here.

Continuing this line, I have found a demonstration video which shows a 1.6 Ghz Atom (likely the 270) and a 500Mhz Cortex A9 development board side by side. Both of the machines run at the same screen resolution, same memory and same operating system (looks like a stock Ubuntu with Gnome).

The video demonstrates web browsing performance with typical websites. The Cortex A9 board seems a little bit slower but not significantly, and at still a perfectly acceptable speed.

Now, the most astounding part is, that the A9 board runs only at 500 Mhz which means that its performance is throttled back for ultra-low power consumption. Cortex A8 level SOCs – the current generation – are known to run at 1 Ghz (Snapdragon, OMAP3, Armada) and the Cortex A9 Sparrow demo chip runs at 2Ghz (produced on the 28nm GlobalFoundries process).

This means that a completely doable Cortex A9 at 1.5 Ghz would have about 3 times the performance of the demo 500Mhz development board and still consume much-much less than the Atom. It would definitely leave the Atom 270 and N450 in the dust.

Moreover, the development board had no graphics accelerator at all, while finalized OEM SOCs will definitely have GPUs built-in (for example the Tegra 2 will include a Geforce GPU coupled with the two A9 cores).

The Cortex A9 at 500 Mhz is an ultra-low-power configuration and it is safe to say that it would take 1/10 – 1/5 of the consumption of the Atom which means much-much better battery runtimes.

In theory, the 1.6 Ghz Atom puts out ~4000 DMIPS and the dual-core, 500 Mhz A9 puts out only 2500 DMIPS raw power. This means that the A9 also has an architectural advantage somewhere. This may be the two real cores of the A9 versus the one-core-with-hyperthreading of the Atom. Since web browsers are by nature heavily multithreaded, the dual-A9 may support this type of application much better.

I can’t wait to see some prototype A9 devices displayed at CES.

Categories: gadgets

Freescale 7″ smartbook tablet design under $200

January 4, 2010 Leave a comment


Freescale has come up with a tablet reference design which they expect to be selling for under $200. It is not entirely clear whether they meant end-user prices or OEM production prices but $200 for a production price would be way too much for a Cortex-A8 category tablet, so I assume they meant end-user prices.

What is interesting about this design, that they have created a special, simplified user interface, which may be appealing for the target audience.

The operating system is a Debian derivative.

This machine would be ideal as an ultra mobile browsing/emailing, video/music playing device at home or when traveling.

The 7″ screen may be too small for some but it definitely makes the machine more portable.

Via Endgadget

More information here.

Categories: gadgets

ARM Cortex A9 vs Intel Atom N450 Pine Trail

January 1, 2010 11 comments

While I am eagerly waiting for the smartbook product introductions at 2010 CES, I am wondering what kind of performance we can expect from those upcoming ARM based tablets and netbooks. Although some of the smartbooks will be based on Cortex A8 technology, I believe only the more performant, dual-core Cortex A9 system-on-chip (SOC) designs will be really successful (see this about the A8).

Since newer Pine Trail Atom netbooks are already getting fairly good battery runtimes, the question is unavoidable for the smartbooks: will we get at least similar performance to the Atom based netbooks? New Intel based netbooks will mostly use the netbook-oriented Atom N450 chip (Pine View), so I will try to draw a comparison between this chip and the known characteristics of A9 SOCs.

Since it is extremely hard to come by good comparative data between ARM and Atom, partly because Cortex A9 based systems are not yet available for the public, this post is highly speculative and by no means should serve as the basis for purchasing your next smartbook/netbook.

By ARM’s specifications, the Cortex A9 core has an approximate raw performance of 2.5 DMIPS/MHz. It can run at 2Ghz when produced on the 28nm GlobalFoundries process. This is 5000 DMIPS/core with an expected 10000 DMIPS for a dual core setup (MP CORE version).

Since it is more likely that the first A9 SOCs will be manufactured with a 40nm process, we only calculate with a 1.5 Ghz top frequency which would yield about 7500 DMIPS.

Now, performance wise. the new N450 is only marginally better that the earlier Atom chips (5-10%, see this Anandtech article) and several discussions report that the older Atoms get 2.5 DMIPS/Mhz, a 1.6 Ghz Atom yields about  4000 DMIPS (one of the discussions). Pine View Atoms for netbooks (N450 descendants) are not planned to be made dual-core in the near future so we calculate with only one core.

I am aware that this is not a perfect comparison since DMIPS values between different architectures are not 100% comparable, but these results would mean an 80% advantage in raw power for the dual-A9.

Some more considerations:

All recent ARM chips include hardware decoders for H264 video while the N450/NM10 has no such capability. This means either choppy HD video from Youtube or an external H264 decoder chip (like the Broadcomm one or an Nvidia Ion like extension). Certain Cortex A9 SOCs promise multiple 1080p stream decoding in parallel (like the Tegra 2) without loading the general purpose ARM core. Moreover, in the case of the N450, the maximum output on hdmi is restricted to 1366×768 (1440×1050 for the analog vga out). So you can forget about viewing HD videos with your Atom netbook even if you have an external, HD monitor or TV.

Flash hardware acceleration is coming (with Flash 10.1)  to all ARM machines with H264 decoders but in case of the N450 alone, there is nothing to accelerate with. So you better check whether your Atom netbook has the external video decoder or you will never watch streamed hd videos with decent speed. It is fully possible that Nvidia won’t produce a new ION chipset for the new Atoms since Intel denied access to the relevant hw interfaces. Instead, Nvidia will work even harder on Tegra 2.

Architecture wise: the new Pine View Atom remains in-order architecture, produced on 45nm while the Cortex A9 is out-of-order core (more modern, inherently more powerful than the Atom) with easy implementation on the TSMC 40nm process and the GlobalFoundries 28nm process.

The n450 SOC and the NM10 companion chip(set) still works in a 6.5w TDP while the dual-A9 SOCs are expected to work in a 2W TDP. This is massive difference and makes it likely that the same battery will last much longer with an A9 smartbook than with an N450 netbook. The N450 doesn’t need active cooling anymore (this is good news) so the new machines will not have fans but the TDP values above indicate that Atom netbooks will likely be hotter than A9 based smartbooks especially in continued use.

The third generation Atoms – which could improve the situation – will come only in 2012, seriously late compared to A9 based chips (1Q 2010).


It very much seems that dual core Cortex A9 SOCs will be at-least on-par with the Pine View N450 Atom, performance wise, and possibly overpower them by 50-80% in raw processing power. Graphics performance, end-user price and battery runtimes are also expected to be much better for the A9 based machines.

Unless, Intel comes out with much more powerful Atom designs for netbooks, ARM Cortex A9 based smartbook products may severely cut into Atom netbook sales. X86 compatibility is less of a factor in this segment, so consumers may decide based on perceived performance, battery runtime in which A9 smartbooks seem to have the advantage.

Categories: gadgets