Alex, I did more testing by using a remote power switch; using 3 BBBs with 3 different Kernel, no modification on U-Boot, Kernel.
- 3.8.13-bone47 - that came with the board - 3.8.13-bone68 - upgrade via on board script /opt/scripts/tools/update_kerenl.sh - 3.14.22-ti-r31 - download from run-ee.net My test scripts turn power switch wait for 50 seconds, send TCP SYN request per second for 5 times, if no ACK received, declare Failure; then power off for 5 seconds, repeat. One thing I found is that with Console port connected, there was no failure on all my tests (other then bone47). Do you have console port connect when testing ? This is my test results, each test has 600 power cycles, Test 1 Test 2 Test 3 Test 4 3.8.13-bone47 50 8.33% (a) 46 7.76% (a) 41 6.83% (a) 40 6.67% (b) 3.8.13-bone68 20 3.33% (a) 0 0% (b) 0 0% (b) 21 3.5% (a) 3.14.22-ti-r31 0 0% (b) 27 4.5% (a) 0 0% (c) 24 4% (a) (a) no console connected (b) with console connected (c) with patch - DGGND to console GND, VDD_3V3 to Console Tx, VDD_3V3 to Console Rx. I just start looking into this, and have not digest all the notes / manual yet; Hope the information help. Regards KeOu > > Hi KeOu, > > I guess with 3.8.13-bone67 I had "phy not found" as frequently as with the > original image. On one board with 3.8.13-bone67, I had just one occurrence of > "phy not found" in 50 power-on resets. On the other board with the same > kernel I had 22 "phy not found" out of 50 power-on resets. Then I updated the > kernel to 3.8.13-bone68, and still had that error, 12 times out of 50 > power-on resets. > > To perform that kernel update, I followed the instructions from the error > message that showed up after I attempted to run "install-me.sh" from > http://rcn-ee.net/deb/wheezy-armhf/v3.8.13-bone68/ Could you please describe > in more detail what prebuilt image you tried and how exactly you installed > that? Did you also install some other U-Boot? > > Some time ago, I installed and tried one of the rcn-ee.net images following a > procedure similar to that described here > <http://www.armhf.com/boards/beaglebone-black/bbb-sd-install/>. But it didn't > help. > > There is one important thing to remember: "phy not found" happens before > autoboot in U-Boot, and if that happens, no matter which Linux is loaded > afterwards - the transceiver chip doesn't work properly. So, both > 3.8.13-bone67 and 3.8.13-bone68 fail to detect the chip, if it wasn't > detected by U-Boot. > > Regards, > Alex > > On Saturday, December 6, 2014 5:59:56 PM UTC+1, keou...@gmail.com wrote: > Hi Alex, > > In past couple days, I went through the same path as you did. However, with > my limited tests, I see improvement on 3.8.13-bone68. I have BBB Rev C from > Element14 with a generic 5V 2.8A switch power supplier. > > - with 3.8.13-bone47 (the original image) power cycle 50 times, there were 2 > "phy not found" > - with 3.8.13-bone68 (prebuild image from http://rcn-ee.net/ > <http://rcn-ee.net/>, power cycle 50 times, there were no "phy not found" > I also tested 3.14.22-ti-r31, power cycle 50 time, and no "phy not found". > > I'll do more test to see if the issue show up. In you tests, did you see any > improvement in 3.8.13-bone67 vs earlier version ? > > Thanks > > KeOu -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
