cmeerw.org blog
http://cmeerw.org/blog/
Christof Meerwald's personal WeblogChristof Meerwaldvidmini - limit webcam resolution
http://cmeerw.org/blog/1031.html
LD_PRELOAD-able shared library that limits the available resolutions a webcam reports. Have a look at the README or the source code.]]>2021-04-25T15:55:42-00:00Christof MeerwaldTizen on Orange Pi PC
http://cmeerw.org/blog/1030.html
that fixed, rendering seems to work fine now and I was also able to enable Full HD (1920x1080) resolution.
Next step would be to get the Home Screen app auto started and find some way to get a "Home" button (to be able to switch between apps without completely closing them).]]>2020-04-26T18:45:55-00:00Christof MeerwaldSIGCHLD si_pid Linux kernel bug
http://cmeerw.org/blog/1029.html
SIGCHLD signal sometimes sent with si_pid==0 (Linux 5.6.5). Luckily, a patch has already been posted less than 24 hours later.]]>2020-04-20T19:02:27-00:00Christof MeerwaldRock Pi S Review
http://cmeerw.org/blog/1028.html
Rock Pi S SBC. Although the cost of the board is only $13.90, with shipping at just over $8, it's a bit over $22 in total. When the board arrived, I did actually wonder if shipping could have been made a bit more economical by not putting the tiny board into a huge box (175 mm x 115 mm x 95 mm) which had a plastic case (70 mm x 50 mm x 25 mm) with the board in it.
Anyway, two things to note about the board are that the serial console uses 1.5 Mbps (which is different to the more common 115200 bps used by other boards), and uses a USB Type C connector for power (like the Raspberry Pi 4, but unlike older SBCs).
Downloading the Ubuntu image and writing it to a SanDisk Ultra 16 GB MicroSD card seemed to work fine to get it to boot. One thing I did notice was that the SSH server keys seemed to have been written to the image and not regenerated on first boot. The other thing to be aware of is that the kernel being used is fairly old (4.4.143) with mainline kernel support only starting to appear now.
One thing that appears strange to me is that total memory is only shown as "MemTotal: 432280 kB" - I am not entirely sure what this isn't (much) closer to 512 MB.
Finally, power consumption seems to be quite good. With WiFi turned on, but otherwise completely idle, my USB tester shows the device using only around 0.2 W. Doing a "ping" and it will go up to around 0.36 W. Reading from the MicroSD card also uses around 0.4 W. Keeping all 4 cores of the CPU busy and power consumption goes up to around 0.85 W.]]>2020-02-29T23:41:48-00:00Christof Meerwaldkmscube Running on Orange Pi PC with Mainline Kernel
http://cmeerw.org/blog/1027.html
kmscube running on my Orange Pi PC with a mainline Linux 5.3 kernel and an updated mesa package from Ubuntu's ubuntu-x-swat PPA. The amazing thing is that it's all just mainline now, no board-specific patches needed. Interestingly, a Raspberry Pi 3 still needs a kernel built from its own branch to get that level of hardware support.
On a slightly related note I have been looking at what level of support I get for my ODROID-C1 now. Unfortunately, there is still no HDMI output and no USB OTG support. Interestingly, HDMI output does work on NetBSD.]]>2019-10-10T17:48:58-00:00Christof MeerwaldOutdoor Maps in Galaxy Store
http://cmeerw.org/blog/1026.html
Outdoor Maps app for Samsung Gear/Galaxy watches has finally been approved in the Galaxy Store.]]>2019-04-19T19:51:15-00:00Christof MeerwaldAdding CircleCI builds
http://cmeerw.org/blog/1025.html
CircleCI builds to my greylstd and SIPFwd projects.]]>2018-12-23T10:59:23-00:00Christof MeerwaldRoundup running on Python 3
http://cmeerw.org/blog/1024.html
Roundup instance to 1.6.0, I have now applied the Python 3 patches from issue2550960 with a few more fixes available in my py3-cmeerw branch and now have both wg21.cmeerw.net as well as issues.cmeerw.org working with Python 3.]]>2018-07-21T09:57:47-00:00Christof MeerwaldRoundup Updated for wg21.cmeerw.net
http://cmeerw.org/blog/1023.html
wg21.cmeerw.net got a major update with Roundup being updated to 1.6.0 and the template converted to being based on jinja2 which should make it more friendly to mobile devices.]]>2018-07-19T06:43:19-00:00Christof MeerwaldPerforce Acquires PRQA
http://cmeerw.org/blog/1022.html
Clearlake Capital-Backed Perforce Adds Enterprise-Grade Source Code Analysis to its Portfolio With Acquisition of PRQA]]>2018-05-02T14:00:35-00:00Christof MeerwaldACME DNS Validation
http://cmeerw.org/blog/1021.html
acme tiny to support DNS-01 validation with a custom PowerDNS backend just a few days ago (in my case to get certificates for an XMPP server where there isn't a corresponding HTTP server or the HTTP server is hosted on a different machine). This work is available from Subversion: pdns-acme-backend.
Interestingly, I am just reading that Let's Encrypt is now supporting wildcard certificates that need to be validated using the DNS-01 challenge type.]]>2018-03-14T17:29:41-00:00Christof MeerwaldHikingMaps for Tizen
http://cmeerw.org/blog/1020.html
HikingMaps is now also available in the Tizen Store for Tizen 3.]]>2017-07-03T20:45:44-00:00Christof MeerwaldBerkhamsted to Tring Walk
http://cmeerw.org/blog/1019.html
GPS data and some pictures: here, here and here.]]>2017-06-04T18:44:44-00:00Christof MeerwaldGalloway Camping Holiday
http://cmeerw.org/blog/1018.html
digital photo album for a few pictures.]]>2017-06-04T18:43:13-00:00Christof MeerwaldCotswolds Walk
http://cmeerw.org/blog/1017.html
GPS data and some pictures: part 1, part 2, part 3, part 4, and part 5.]]>2017-05-21T18:46:57-00:00