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| Uses for SPI Flash |
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Posted by: NoraCodes - 09-29-2019, 10:53 AM - Forum: General Discussion on Pinebook Pro
- Replies (36)
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The PBP is listed as having 128 MB of SPI flash - I assume this is where UBoot lives, but perhaps it could also be used for e.g. storing crypto keys and the like? Does anyone know if Linux has a good way to do this safely?
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| Ethernet latency |
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Posted by: nethammer - 09-29-2019, 05:42 AM - Forum: Linux on Rock64
- Replies (1)
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Hi Everyone,
I've been using Rock64 boards for about a year now and am overall pleased with them. I'm having NO stability or reliability issues, etc.
However, there has been one issue I've not been able to overcome---Ethernet latency. This is seen directly with ping performance, where ping round-trip times to/from a neighbor on the same LAN will be 650+ uS (microseconds). I've tried a LOT of tests and poked a lot of parameters, no solution found. For comparison, other (non-Rock64) hosts on the same LAN show round-trip latency under 150uS.
I've also tried different kernels, from recent Armbian (kernel: 4.4.182-rockchip64) to my preferred platform, archlinuxarm aarch64, including 4.18.2-1-ARCH
(my early builds from last year) up thru very recent, 5.x kernels.
I'm evaluating these boards for routing/firewall/VPN applications. I've not yet tried to evaluate what impact the network latency might have on performance. Typical routing performance I'm seeing, including VLANs and bridging, will end up with thru-put latency of over 1.6mS....That's a long time !
Any thoughts about a solution??
Thanks!
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| Encrypted disk |
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Posted by: jpakkane - 09-27-2019, 02:29 PM - Forum: Linux on Pinebook Pro
- Replies (11)
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Has anyone looked into running the pbpro with full disk encryption? It works really nicely on x86, but since the whole boot mechanism is different, there is no guarantee it will work out of the box.
Thanks,
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| Hibernation (suspend to disk) progress |
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Posted by: NoraCodes - 09-25-2019, 11:30 AM - Forum: Linux on Pinebook
- Replies (4)
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I have spent the last few days working on getting suspend to disk (hibernate) working, to improve battery life, since suspend to RAM does not improve it that much. I have it working now, with one major caveat. I am doing this on Manjaro ARM but the process should be similar on any OS.
First, it is necessary to create a swapfile using normal techniques. Allocate a swapfile (we'll call it /swapfile), set it as swap, and place an entry for it in /etc/fstab.
Create a 4GB file:
Code: sudo fallocate -l 4G swapfile
Make it a swapfile, make it private to root, and turn it on:
Code: sudo mkswap /swapfile
sudo chmod 0600 /swapfile
sudo swapon /swapfile
Then, add it to fstab, with the line "/swapfile swap swap defaults 0 0".
Now we need to add the resume hook to the initcpio. In /etc/mkinitcpio.conf, change the HOOKS line to include the hook resume:
Code: HOOKS=(base udev autodetect modconf block resume filesystems keyboard fsck)
Now we need to edit the kernel's command line to include the resume target. First we need the UUID and the offset of the file.
Get the UUID with
Code: sudo findmnt -no SOURCE,UUID -T /swapfile
And the offset by looking at the first row of sudo filefrag -e /swapfile, looking at the first column marked physical_offset. This tells the kernel where on the given block device to look.
These values need to be put into the kernel command line in /boot/boot.txt like so:
Code: # Original line
setenv bootargs console=${console} console=tty0 root=PARTUUID=${uuid} rw rootwait
# New line
setenv bootargs console=${console} console=tty0 root=PARTUUID=${uuid} rw rootwait resume=UUID=29a4df6e-1531-4e1b-be79-82bd21f849ff resume_offset=2727936
Then you need to generate a new uboot script by running sudo /boot/mkscr followed by sudo mkinitcpio -P to regenerate the modified initcpio.
Now the machine will hibernate and resume! Try it with systemctl hibernate.
HOWEVER. In my case, when the system resumes, the screen image is as expected, but the screens brightness is at minimum and neither the keyboard or the trackpad work. I have to hard power off the machine and reboot.
If we can solve this problem, Pinebook can have working suspend-to-disk!
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| C4Labs Case Fan Setup |
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Posted by: langerma - 09-25-2019, 07:35 AM - Forum: Clusterboard
- Replies (2)
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Hello,
is anybody using the C4Labs clusterboard case and the fans?
what is the best way to power them up?
i have connected them as described in the docu, but they are not spinning up.
kind regards,
langerma
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| ROCKPro64 5amp PS usable on Pinebook Pro? |
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Posted by: Arwen - 09-25-2019, 04:56 AM - Forum: General Discussion on Pinebook Pro
- Replies (2)
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Would the ROCKPro64 5volt, 5amp power supply be uable with the Pinebook Pro?
Mostly seeing if I mis-place my PBP power supply, would I have a backup power supply using one from my ROCKPro64...
Though, now that I think about it, I have a 5v, 3a USB power brick on my desk to charge various portable devices. That might work using a USC-C cable.
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