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FS#1503 - GL-MT300A Crashes and Reboots in a Loop As of 17.01.2 #6476
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mkresin: Are the snapshots affected by the same bug? If yes, you should find a crashlog after the reboot in /sys/kernel/debug/crashlog. Use 'cat /sys/kernel/debug/crashlog' to get the crashlog contents. |
StefanTT: As soon as WIFI is enabled the router crashes / reboots in a loop. Is there a way to get the crash log? |
mkresin: Well, it doesn't answer my question if the snapshots are affected as well.
According to the reporter:
There should be a 1-2 minute window to ssh into the router, to get the crashlog of the error caused the last reboot. Of course, the easiest way is to attach a serial console and check the output. |
WBINVD: I have no crashes with WiFi on 17.01.4 or a snapshot build. I ran iperf3 between 2 wireless clients connected to the router and didn't encounter any problems. Try stress testing the router on 17.01.1 or official firmware to rule out a power supply or cable problem. |
languagegame: I connected a serial cable and captured the log. This is for LEDE 17.01.4. Only change to default configuration was to enable Wi-Fi. No ethernet cables plugged in. Just the serial cable and the power cable. I'll try snapshot to see if fails there as well. Note that it crashes when I connected via Wi-Fi and open Luci. It doesn't crash under LEDE 17.01.1. After it reboots, I checked to see if there was a crashlog under /sys/kernel/debug, but I did not see anything. Anyway, here is the serial log (you can see it rebooted twice, I pulled the power cord after the second reboot so the log gets cut off at the end).
U-Boot 1.1.3 (Dec 23 2015 - 18:37:46)
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languagegame: I wonder if it could be a power supply issue. I was using a 5W iPhone USB Charger originally. As a test, I switched to the larger 10W iPad USB Charger, and now it seems to be running. Will let it run overnight and see if anything changes. |
languagegame: This is now resolved by changing to a more powerful USB charger. |
languagegame:
The GL.iNet GL-MT300A runs stable on LEDE 17.01.1. This device is an ramips/mt7620 target.
However, two users in the LEDE forum have reported that the device becomes unstable after upgrading it to LEDE 17.01.2 or later (including 17.01.4). The device boots but then crashes and reboots in a loop over and over. The only workaround seems to be to go into recovery mode and then flash back to LEDE 17.01.1 after which it becomes stable again.
It's difficult to debug as you can ssh into the device upon boot, but then it crashes within a minute or two. One user in the form post below suggested it is related to the Wi-Fi driver.
More details here:
https://forum.lede-project.org/t/gl-mt300a-wifi-broken-with-newer-lede/10856
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