Magnets

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  1. I have NFS running on opi PC2 5.4.43-sunxi64 working fine
  2. I had a problem with ext4 and data being committed every 30 seconds and changing commit interval in fstab made no difference to fix it I modified: /proc/sys/vm/dirty_expire_centisecs to 500 (5 seconds). 30 seconds is default You can monitor it with: cat /proc/meminfo | grep "Dirty" -A1
  3. The latest update on my OPI pc2 has reduced the max cpu freq from 1.3ghz to 1.01ghz. I believe the old minfreq was 120mhz? linux-stretch-root-next-orangepipc2_5.85_arm64.deb /etc/default/cpufrequtils # WARNING: this file will be replaced on board support package (linux-root-...) upgrade ENABLE=true MIN_SPEED=480000 MAX_SPEED=1010000 GOVERNOR=ondemand
  4. I have a similar issue on opi PC2 with 4.19.25-sunxi64 and a DVB-T2 USB dongle. The problem is solved by locking the frequency scaling. E.g. I have # WARNING: this file will be replaced on board support package (linux-root-...) upgrade ENABLE=true MIN_SPEED=120000 MAX_SPEED=1400000 #MAX_SPEED=500000 GOVERNOR=conservative If MIN_SPEED and MAX_SPEED are the same you don't get any problems. Performance gov works OK (it locks to max freq) ondemand or interactive don't fix it unless you lock frequency I can lock frequency at 420mhz and it works fine so it's not rel
  5. On the PC2 I found the default governor (ondemand?) makes the freq spike too much, conservative prevents it from just hitting max freq every time you load it. I run conservative with an up_threshold of 50 (I think default is 25%) IIRC the parameter that allows it to consider IO as part of the load is not available on conservative so you lose a small amount of performance at the top end. If you're using USB wifi dongles it also doesn't want to increase freq in a hurry when running conservative.
  6. I have just noticed the same issue when trying to use armbian-config on pi pc2, as have others here: https://github.com/armbian/config/issues/33 My armbianEnv.txt looks like this /var/log.hdd/aptitude { rotate 6 monthly compress missingok notifempty } ^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@ usbstoragequirks=0x2537:0x1066:u,0x2537:0x1068:u
  7. I thought I'd share some links to JMS578 based enclosures I've found: ACASIS FA-08US - cheapest on ebay but also on ali https://www.aliexpress.com/item/Acasis-fa08us-2-5-inch-usb3-0-aluminum-external-hard-drive-disk-SATA-SSD-mechanical-solid/32818921168.html Metal enclosure with plastic tray, has 4 mounting holes to secure the drive to the tray. Firmware Version: v0.5.0.8 CHIPAL clear enclosure - Firmware Version: v133.2.0.2. This enclosure gave me errors after running fstrim with an ADATA SU650 but not with another SSD I have. It works fine with discard. The SU650
  8. Mt76 based dongles should work. A6210 works OK for me. I get around 160mbit/250mbit on 5ghz AC 110mbit on 2.4ghz Around £15 on ebay. Argos sell them for £30 but reduce to £20 on occasion https://wireless.wiki.kernel.org/en/users/drivers/mediatek The drivers are under active development https://github.com/openwrt/mt76/commits/master some of the RTL8812AU yellow dongles from china come with RTL8812CU now. RTL8812AU perform bad even under windows so likely have poor design
  9. Great work! I have the same problem with a PC 2 which came direct from the manufacturer Your script has some unicode characters so I removed them: sed -i -e '1imw.l 0x01C20020 0x80101810\' /boot/boot.cmd mkimage -C none -A arm -T script -d /boot/boot.cmd /boot/boot.scr
  10. That looks neat and essentially gives me 3 USB ports as I would be using USB-SATA adapter anyway but it's $55 USD including shipping to the UK sound good
  11. I have an orange pi PC that I use as a simple NAS (NFS, smb, iscsi) and for openVPN occasionally but want something new with GbE. What is the best upgrade that will give me 2 or more usb ports, GbE and a faster processor? With decent software support ()? I don't need HDMI or wifi but it would be a plus 512MB-1GB RAM opi zero plus? opi PC 2? Around $20 shipped ideally
  12. Using performance gov on opi PC with Sandisk 16GB A1 on a usb card reader Command line used: iozone -e -I -a -s 100M -r 4k -r 16k -r 512k -r 1024k -r 16384k -i 0 -i 1 -i 2 Output is in kBytes/sec Time Resolution = 0.000001 seconds. Processor cache size set to 1024 kBytes. Processor cache line size set to 32 bytes. File stride size set to 17 * record size. random random bkwd record stride kB reclen write rewrite read reread read
  13. I'd use this to get the HDMI output of your DSLR encoded (720p only) https://blog.danman.eu/new-version-of-lenkeng-hdmi-over-ip-extender-lkv373a/ Then a raspberry pi or pi0 to do the hw h264 re-encoding
  14. Not sure, but I don't think so. AFAIK you can only wake from IR or GPIO You can buy RTC modules based on the DS3231 which have built in wakeup alarms that you can set and trigger a GPIO on the opi to wake it
  15. If you want hardware accelerated decoding you need to use mpv or mplayer. I'm not sure if you can run multiple instances and all use VDPAU edit: mpv segfaults if you open 2 instances