Hi,
sometimes on our OS, the USB ports (as well as the modem) don't work.
Not even a mouse or a similar low-power device works in that case.
The hardware should be fine, as IF it works after booting up, it works
totally reliably.
I've attached a dmesg output from a user of the boot process when USB
does NOT work.
I've also asked him to send a dmesg after he plugs in a device, so we
can see what error USB produces.
But there are already a few interesting error messages in the dmesg.
It seems the USB bus is found.. but produces an error.
What's error -110 ?
Any idea how to debug this further?
AFAIR this effect changes based on the U-Boot / MLO setup you use. I
remember that I tried various U-Boot / MLO combinations when starting
the mass production - and one ALWAYS had a failing USB.
Didn't test that thoroughly, so take it with a grain of salt.
But maybe some initialization parameters in the board file or similar
are off?
[7.084037] ehci-omap 4a064c00.ehci: EHCI Host Controller
[7.100253] ehci-omap 4a064c00.ehci: new USB bus registered, assigned
bus number 1
[7.114047] ehci-omap 4a064c00.ehci: irq 106, io mem 0x4a064c00
[7.154177] ehci-omap 4a064c00.ehci: USB 2.0 started, EHCI 1.00
[7.170718] usb usb1: New USB device found, idVendor=1d6b,
idProduct=0002, bcdDevice= 5.06
[7.183576] usb usb1: New USB device strings: Mfr=3, Product=2,
SerialNumber=1
[7.195528] usb usb1: Product: EHCI Host Controller
[7.204562] usb usb1: Manufacturer: Linux 5.6.19-daveiii-pyradef-aufs
ehci_hcd
[7.216372] usb usb1: SerialNumber: 4a064c00.ehci
[7.225588] hub 1-0:1.0: USB hub found
[7.233218] hub 1-0:1.0: 3 ports detected
[7.604098] usb 1-2: new high-speed USB device number 2 using ehci-omap
[7.706183] ehci-omap 4a064c00.ehci: port 2 reset error -110
[16.474154] usb usb1-port2: Cannot enable. Maybe the USB cable is bad?
[16.489352] usb usb1-port2: attempt power cycle
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