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Pine A64+ Gigabit issue... - Printable Version +- PINE64 (https://forum.pine64.org) +-- Forum: PINE A64(+) (https://forum.pine64.org/forumdisplay.php?fid=4) +--- Forum: Linux on Pine A64(+) (https://forum.pine64.org/forumdisplay.php?fid=6) +--- Thread: Pine A64+ Gigabit issue... (/showthread.php?tid=887) |
RE: Pine A64+ Gigabit issue... - tkaiser - 05-04-2016 (05-03-2016, 10:31 PM)rhkean Wrote: I installed the Ubuntu image from this link. Thx for ruling out other problem sources. We discussed in the meantime potential origins of this problem (most people with GbE boards aren't affected of) and thought about whether insufficient power supply might be the reason. The external RTL8211E GbE PHY on the board needs a specific amount of power to work reliable and maybe connecting the board to a 100 Mbits/sec switch avoids the problem. Since still no one took the time to implement voltage readouts the only reliable way to check for a relationship with insufficient DC-IN is to ensure stable DC-IN, eg. powering through the Euler connector: ![]() Another potential issue could be that there's something wrong with the 2 more cable pairs used for GbE. With Fast Ethernet only 4 wires/traces are used, with GbE all 8 are needed. But I would check for powering issues first. RE: Pine A64+ Gigabit issue... - tkaiser - 05-04-2016 Found it: Post 97: http://forum.armbian.com/index.php/topic/853-armbian-customization/?p=8074 The PHY shouldn't need that much voltage (maybe even just 1.8V) but in case DC-IN voltage is insufficient strange things might happen. RE: Pine A64+ Gigabit issue... - rhkean - 05-04-2016 (05-04-2016, 03:01 AM)tkaiser Wrote: Found it: Post 97: http://forum.armbian.com/index.php/topic/853-armbian-customization/?p=8074 a couple questions to clarify... Are you saying to provide power from a controlled source via the Euler bus (pins 2, 4, 6, & 9) INSTEAD of over the micro-USB power port? Also, I have a 3.5A uUSB wall wart that I bought for my Pi2 (I got tired of seeing the rainbow cube while watching videos in kodi). Currently, I'm just using the power supply that I bought with my backer kit. Do you think the 3.5A ps will help? Or, is the AXP803 pmic limiting the voltage (or current) through the board? (which is my guess, and thus powering via euler bus by-passes that... but, power management is not my strong suit) thanks rob RE: Pine A64+ Gigabit issue... - tkaiser - 05-04-2016 (05-04-2016, 06:38 AM)rhkean Wrote: Are you saying to provide power from a controlled source via the Euler bus (pins 2, 4, 6, & 9) INSTEAD of over the micro-USB power port? If the latter successfully prevented that RPi symptom then please give this PSU a try first (since then it's NOT a smart charger but provides the amount of amperage to Pine64 that is needed and not maxes out at 500mA). Regarding Euler bus. When I made the picture above I simply got so sick of Micro USB related power problems that I used 4 cables. 2 are enough (5V to pin 4, GND to pin 6). And according to TL Lim and schematic the Micro USB based DC-IN and these Euler pins are connected directly (so when you power your Pine through the Euler pins you could also use the Micro USB barrel to charge phones and the like ![]() I would give the 3.5A PSU a try first (Pine64 won't exceed 1A with normal 'workloads' but the real problem are voltage drops mostly caused by USB cables with insufficient gauge ratings -- never try anything above AWG 20) Pine A64+ Gigabit issue... - Faye - 05-04-2016 If you scale from 1000MBit to 10Mbit and everything works, doesn't Clock/Interrupt seem like a more likely cause of the problems people are seeing than power? If you change your CPU clock governor to performance and that affects your Ethernet performance, doesn't that suggest the Ethernet is on a governed clock? Are we using the right clock for the job? Is the clock configured correctly? I will note on Gigabit settings an 80% packet loss on the local network at a packet rate of 1/s which is enough to reduce any TCP to a standstill. RE: Pine A64+ Gigabit issue... - tkaiser - 05-04-2016 (05-04-2016, 10:18 AM)Faye Wrote: I will note on Gigabit settings an 80% packet loss on the local network And I have 0% packet loss. Pine A64+ Gigabit issue... - Faye - 05-04-2016 Do you have the 2G REV B? Sent from my iPad using Tapatalk RE: Pine A64+ Gigabit issue... - rahlquist - 05-04-2016 (05-04-2016, 06:32 PM)Faye Wrote: Do you have the 2G REV B? I do, no issues. Code: root@debianpine64:~# date RE: Pine A64+ Gigabit issue... - rhkean - 05-04-2016 (05-04-2016, 07:00 AM)tkaiser Wrote: I would give the 3.5A PSU a try first (Pine64 won't exceed 1A with normal 'workloads' but the real problem are voltage drops mostly caused by USB cables with insufficient gauge ratings -- never try anything above AWG 20) Well that didn't fix it. This is the power supply: http://www.amazon.com/Extra-Charger-HP-Chromebook-11-Pavilion-Adapter-Power-Supply-Cord/dp/B00OPEW1I6 this is the what I did (on gigabit): * new ubuntu image * log in as ubuntu * sudo su - * apt-get update * 20 minutes later, It's still on Hit 6 of 8. this is the what I did (on 100mbps): * new ubuntu image * log in as ubuntu * sudo su - * apt-get update * 8 hits, 15 seconds or so... I'm not sure that I have any decent, non-usb wall warts lying around that I can use for power... RE: Pine A64+ Gigabit issue... - rahlquist - 05-05-2016 (05-04-2016, 09:13 PM)rhkean Wrote:(05-04-2016, 07:00 AM)tkaiser Wrote: I would give the 3.5A PSU a try first (Pine64 won't exceed 1A with normal 'workloads' but the real problem are voltage drops mostly caused by USB cables with insufficient gauge ratings -- never try anything above AWG 20) Have you run the kernel and uboot update scripts? |