Linux Category - Page 339 of 553 - CNX Software

May 16, 2016 by Jean-Luc Aufranc (CNXSoft) - 9 Comments

Preliminary Open Source Bootloader for Raspberry Pi Boards Released

Raspberry Pi boards require a closed-source binary to boot. I understand it this is handled by VideoCore IV GPU, and so far the Raspberry Pi foundation are not release source code for the bootloader, possibly due to legal reason (e.g. NDA to Broadcom). But I noticed people chatting about an open source bootloader for Raspberry Pi on sunxi-linux IRC channel. The bootloaded called rpi-open-firmware has been developed by Kristina Brooks (christinaa), who previously did some work on the VideoCore IV GPU, as you can see on her blog and github account. Kristina describe the project as follows: This is a small firmware for RPi VPU (VideoCore4) versions 1/2/3 that is capable of initializing VPU PLL (PLLC), UART, SDRAM and ARM itself. It’s intended to be used instead of stock bootcode.bin on RPi’s SD card. You need to have UART to see anything meaningful as far as output goes. This has […]

May 16, 2016May 29, 2017 by Jean-Luc Aufranc (CNXSoft) - 2 Comments

Linux 4.6 Release – Main Changes, ARM and MIPS Architectures

Linus Torvalds released Linux Kernel 4.6 earlier today: It’s just as well I didn’t cut the rc cycle short, since the last week ended up getting a few more fixes than expected, but nothing in there feels all that odd or out of line. So 4.6 is out there at the normal schedule, and that obviously also means that I’ll start doing merge window pull requests for 4.7 starting tomorrow. Since rc7, there’s been small noise all over, with driver fixes being the bulk of it, but there is minor noise all over (perf tooling, networking, filesystems, documentation, some small arch fixes..) The appended shortlog will give you a feel for what’s been going on during the last week. The 4.6 kernel on the whole was a fairly big release – more commits than we’ve had in a while. But it all felt fairly calm despite that. Linux 4.5 added […]

May 14, 2016May 16, 2016 by Jean-Luc Aufranc (CNXSoft) - 11 Comments

Star Cloud PCG02U Ubuntu TV Stick Unboxing and Teardown

Star Cloud PCG02U is one of the rare device selling pre-loaded with Ubuntu 14.04, and MeLE, who owns Start Cloud brand, sent me one sample for review. While many Android & Windows devices can be “hacked” to run Linux distributions such as Ubuntu, Star Cloud PCG02U is the first device that I’ve ever received that’s actually shipped with Ubuntu 14.04. So it will be very interesting to find out how it performs, but today, I’ll check the device and its accessories, as well as the hardware design. Star Cloud PCG02 Unboxing The TV stick ships in a Ubuntu orange retail packaging with Star Cloud branding, and mention of Ubuntu and Intel. I had already published the specifications in my first post, a confirmation on the package is always good. The TV stick ships with a 5V/2A power adapter and multi-country plug adapters, a female to female HDMI adapter, a Quick […]

May 13, 2016 by Jean-Luc Aufranc (CNXSoft) - No Comments

Arduino Industrial 101 Board Powered by Atmel AVR and Atheros AR9331 WiSoC Targets Industrial IoT Applications

Arduino boards were first used by hobbyists, educators and their students, but in recent year more and more professional engineers have started to build prototypes with Arduino boards before moving to the design of the final product. Arduino Srl went further by designing an industrial grade board, namely Arduino Industrial 101, combining an Atmel AVR for real-time I/O control, and a Qualcomm Atheros AR9331 for WiFi connectivity. Arduino Industrial 101 (A000126) specifications: Arduino part MCU – Atmel ATmega32u4 AVR MCU @ 16 MHz with 32KB flash, 2.5 KB SRAM, 1KB EEPROM Digital I/O Pin – 20, with 7 PWM and UART Analog Input Pins – 12 DC Current per I/0 – 40 mA Operating Voltage – 5V Linux (LininoOS) part (101 Industrial LGA “Chiwawa” module) Processor – Atheros AR9331 MIPS processor @ 400 MHz System Memory – 64 MB DDR2 Storege – 16 MB flash WiFi – 802.11 b/g/n […]

May 13, 2016May 29, 2017 by Jean-Luc Aufranc (CNXSoft) - 13 Comments

Allwinner News – Root Exploit in Linux and Fake Pine A64 Boards

There’s been a lot of buzz about a root exploit in Linux 3.4 kernel for Allwinner H3/H83T SoCs found by linux-sunxi & armbian developers in the last few days. Since the kernel for H3 / H83T is stuck to 3.4, and not always updated on the vast majority of hardware platforms, it’s quite likely there are many ways to breach into such systems, and even the majority of Android devices are not secure, not only the ones powered by Allwinner. So I did not really pay attention at first, but it went viral with stories reporting a hidden backdoor, and hitting to ill-intent. But is that really the case? That’s the code from github, now removed from the master branch, but still in A83T branch. It’s now super easy to gain root access by simply running one command which works for any users:

echo "rootmydevice" > /proc/sunxi_debug/sunxi_debug

1	echo "rootmydevice" > /proc/sunxi_debug/sunxi_debug

That’s obviously pretty bad, but is […]

May 13, 2016May 13, 2016 by Jean-Luc Aufranc (CNXSoft) - 10 Comments

MiQi Dual Boot Android & Ubuntu Development Board Crowdfunding Campaign Has Launched

MiQi is a development board using a form factor similar to Raspberry Pi boards, but based on a more powerful Rockchip RK3288 Cortex A17 processor combined with 1 or 2 GB. I had the change to test an early sample pre-loaded with a dual boot image with Android 5.1 and Lubuntu 14.04, and found it to be one the fastest sub $100 development board in Linux, behind Hardkernel ODROID-XU4, as well as better CPU & GPU performance compared to recent Android TV boxes based on Amlogic S905, Rockchip RK3368, and so on. MQMaker has now launched a flexible funding crowdfunding campaign on Indiegogo to raise funds for mass production. Let’s remind us of MiQi hardware specifications first: SoC – Rockchip 3288 quad core ARM Cortex A17 up to 1.8 GHz with Mali-T764 GPU supporting OpenGL ES 1.1/2.0 /3.0, and OpenCL 1.1 System Memory – 1 or 2G DDR3 depending on model Storage – 8 or 32 […]

May 11, 2016 by Jean-Luc Aufranc (CNXSoft) - 7 Comments

VoCore2 WiFi IoT Module Features Mediatek MT7628AN Processor

When Vocore WiFi module launched in 2014 on Indiegogo, it quickly became popular as at the time it was hard to find cost effective and small WiFi modules with GPIOs, and its compact Ethernet dock solution was also a hit. The developer has now been working on VoCore2 for several months, and recently announced a beta testing program. Vocore2 preliminary specifications: SoC – Mediatek MT7628AN MIPS processor @ 580 MHz System Memory – 64 or 128 MB DDR2 Storage – 16MB NOR FLASH, 1x SDXC via I/O pins Connectivity – WiFi 802.11n 2T2R up to 300 Mbps with either 2 u.FL connector or 1 u.FL connector + on-board chip antenna (Max signal output >19.5dbm peak); 2x 10/100M Ethernet interfaces via I/O pins I/Os – About 30 GPIOs multiplexed with 3x UARTs, 1x I2C, 1x I2S, 1x reference clock, 1x USB 2.0, 1x PCIe 1.1, 1x high speed SPI (40Mbps max), […]

May 11, 2016 by Jean-Luc Aufranc (CNXSoft) - 1 Comment

Arduino Yún Shield Adds Ethernet and WiFi to Arduino Boards for $50

You can now add WiFi to Arduino for about $3 thanks to ESP8266, and it’s been long possible to add Ethernet with ENC28J60 module now selling for the same $3. Alternatively, if you want some a little more powerful, you could also use IoT modules running OpenWrt such as a $30 WrtNode or $13 LinkIt Smart 7688 both capable of supporting Ethernet with some hacks. But if you’ve been used to Arduino Yun, have a few spare Arduino boards, or simply think the other solutions are just too cheap, Arduino LLC has just launched Arduino/Genuino Yún Shield for $49.90 / 43.90 Euros. Arduino Yún Shield specifications: SoC – Qualcomm Atheros AR9331 MIPS WiSoC @ 400 MHz System Memory – 64 MB DDR2 Storage – 16 MB flash Connectivity – 10/100 M and 802.11 b/g/n WiFi USB – 1x USB 2.0 host port Board interfacing – SPI and HW Serial Misc […]