Checking Out Machine Check Exception (MCE) Errors in Linux

Machine Check Exception Error Linux

I recently reviewed ODROID-H2 with Ubuntu 19.04, and noticed some errors messages in the kernel log of the Intel Celeron J4105 single board computer while running SBC-Bench benchmark: I did not know what do make of those errors, but I was told I would get more details with mcelog which can be installed as follows: There’s just one little problem: it’s not in Ubuntu 19.04 repository, and a bug report mentions mcelog is not deprecated, and remove from Ubuntu 18.04 Bionic onwards. Instead, we’re being told the mcelog package functionality has been replaced by rasdaemon. But before looking into the utilities, let’s find out what Machine Check Exception (MCE) is all about from ArchLinux Wiki: A machine check exception (MCE) is an error generated by the CPU when the CPU detects that a hardware error or failure has occurred. Machine check exceptions (MCEs) can occur for a variety of reasons ranging from undesired or out-of-spec voltages from the power supply, …

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ODROID-H2 Review – Part 2: Ubuntu 19.04

ODROID-H2 Review

After many months of delays due to Intel not mass-producing Gemini Lake processors, Hardkernel started selling ODROID-H2 again, more exactly ODROID-H2 Rev. B, and the end of last month, and the company sent me a full kit for evaluation. You can check out ODROID-H Rev. B with Type 3 case and the assembly instructions in the first part of the review. I’ve now had time to play with the board using the pre-installed Ubuntu 19.04 operating systems so I’ll report my experience in this second part. Note that ODROID-H2 does not rely on a custom version of Ubuntu, and instead you can download and flash Ubuntu 18.04 or 19.04 ISO directly from Ubuntu website. First Boot and System Information I had already connected two SATA drives inside the enclosure, one SSD and one HDD, but before booting the device I connected an HDMI cable, one Ethernet cable, USB keyboard & mouse, as well as the power supply. The board booted …

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Linux 5.2 Release – Main Changes, Arm, MIPS & RISC-V Architectures

Linux 5.2 Changelog

Linus Torvalds announced the release of Linux 5.2 last Sunday: So I was somewhat pre-disposed towards making an rc8, simply because of my travels and being entirely off the internet for a few days last week, and with spotty internet for a few days before that [*]. But there really doesn’t seem to be any reason for another rc, since it’s been very quiet. Yes, I had a few pull requests since rc7, but they were all small, and I had many more that are for the upcoming merge window. Part of it may be due to the July 4th week, of course, but whatever – I’ll take the quiet week as a good sign. So despite a fairly late core revert, I don’t see any real reason for another week of rc, and so we have a v5.2 with the normal release timing. There’s no particular area that stands out there – the changes are sosmall that the appended …

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ODROID-H2 Rev B Review – Part 1: Kit Unboxing and Assembly

ODROID-H2 Case Type 3 Assembled

ODROID-H2 was announced in October 2018 as the first x86 SBC from Hardkernel. The board features an Intel Celeron J4105 Gemini Lake processor, two SO-DIMM slots for memory, two SATA ports and M.2 NVMe slot for storage, two Gigabit Ethernet ports, a mix of USB 3.0 and 2.0 ports, as well as HDMI and DisplayPort video outputs. The board went for sale the following month for $111, and the first batch of 2,000 boards was sold within 24 hours. In normal cases, this should not be a big problem, and in a few weeks, the company should have been able to produce more boards to fulfill the demand. But Intel decided to prioritize higher-end processors, and Gemini Lake SoCs’ manufacturing was put on the back foot. That means Hardkernel had to wait over 6 months to get supply of the Celeron J4150 processors. In the meantime, the company slightly redesign the board, now called ODROID-H2 Rev B, and the good …

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Linux 5.1 Release – Main Changes, Arm, MIPS & RISC-V Architectures

Linux 5.1 Changelog

Linus Torvalds has just announced the release of Linux 5.1: So it’s a bit later in the day than I usually do this, just because I was waffling about the release. Partly because I got some small pull requests today, but mostly just because I wasn’t looking forward to the timing of this upcoming 5.2 merge window. But the last-minute pull requests really weren’t big enough to justify delaying things over, and hopefully the merge window timing won’t be all that painful either. I just happen to have the college graduation of my oldest happen right smack dab in the middle of the upcoming merge window, so I might be effectively offline for a few days there. If worst comes to worst, I’ll extend it to make it all work, but I don’t think it will be needed. Anyway, on to 5.1 itself. The past week has been pretty calm, and the final patch from rc6 is not all that …

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Giggle Score Says ODROID-N2 Best Value, Raspberry Pi Zero Worst Value

Giggle Score

[Update May 7, 2019: Giggle Score has been updated to use 7-zip to benchmark the boards instead of sysbench, and the “best value” rankings are now quite different] People like to compare single board computers, and usually want to have a simple answer as to which is better than the others. But in practice it’s impossible, because the beauty of SBCs is that they are so versatile and can be used in a wide variety of project, and that means in some cases the “best board” may be completely useless to you since it lacks a critical feature and interface for YOUR project be it H.265 video encoding or a MIPI DSI display interface. Still, it’s still always fun to look at benchmark scores and trying to compare SBCs, and for projects that mostly require CPU processing power it may also be useful. Robbie Ferguson has been developing and maintaining NEMS (Nagios Enterprise Monitoring Server) Linux for single board computers …

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Batocera.Linux OS Combines Kodi & Retro Gaming for Raspberry Pi & ODROID Boards

batocera.linux

There are already several ways to run retro games on development boards, with for example RetroPie, and derivatives like RetrOrangePi, Lakka and Recalbox. Batocera.Linux is another option that I had never heard about so far, and works on PCs, as well as Raspberry Pi and ODROID boards, with ODROID-N2 support having been added very recently. batocera.linux operating system can easily be run from a USB flash drive on your computer without altering your existing OS, while it will boot from a standard microSD card on Raspberry Pi and ODROID boards. Beside retro-gaming support, the OS also includes Kodi media center for playing videos, or listening to music. You may even play games in it since retro-gaming support was added in Kodi 18. The partial compatibility table above shows all platforms have a different level of support, and for Intel hardware support more emulators than Arm based boards. The Orange arrow means it works but performance is poor, and the yellow …

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ODROID-N2 GPU Drivers, Linux 5.0, and Impressive glmarks-es2 Score

Ubuntu 18.04 Gnome Wayland ODROID-N2

ODROID-N2 was announced last February for $63 (2GB RAM), and $79 (4GB RAM), but Hardkernel was not quite ready to take orders at the time. One of the good news is that the 4GB RAM is now available for pre-order with shipping scheduled to start on April 3. Another good news is on the software side with Hardkernel having released the userland Mali-G52 Wayland driver. It does not work well with Linux 4.9 due to incomplete DRM implementation, but it goes work with Linux 5.0 plus some modifications as further discussed in the aforelinked forum thread. The screenshot above, courtesy of odroid forum member memeka , shows ODROID-N2 running Ubuntu 18.04 + Gnome3 + Linux 5.0 on top of Wayland with GPU drivers providing acceleration as shown by glmark2-es2-wayland test program. The benchmark results are pretty impressive: I’ve never seen such as high score (1,119 points) on Arm hardware. But at the same time, I’ve never run the wayland version …

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