Public bug reported: hardware: two arm boards (e.g. a panda and a beagle xm), a usb to mini usb cable
testing scenario: power both boards with external power supply and panda: let it normally boot till login prompt beagle: stop it at u-boot prompt then connect the usb plug to the panda board, and the mini usb to the beagle, on panda console will appear: omap login: [ 227.659362] hub 1-1:1.0: state 7 ports 5 chg 0000 evt 0004 [ 227.666381] hub 1-1:1.0: port 2, status 0101, change 0001, 12 Mb/s [ 228.682250] hub 1-1:1.0: debounce: port 2: total 100ms stable 100ms status 0x101 [ 228.920898] usb 1-1.2: new full speed USB device number 4 using ehci-omap [ 229.230010] usb 1-1.2: skipped 4 descriptors after interface [ 229.236145] usb 1-1.2: default language 0x0409 [ 229.252380] usb 1-1.2: udev 4, busnum 1, minor = 3 [ 229.257415] usb 1-1.2: New USB device found, idVendor=0525, idProduct=a4a7 [ 229.264739] usb 1-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 229.272552] usb 1-1.2: Product: U-Boot 2011.03 [ 229.277282] usb 1-1.2: Manufacturer: Das U-Boot [ 229.282043] usb 1-1.2: SerialNumber: 0000000 [ 229.287231] usb 1-1.2: usb_probe_device [ 229.295227] usb 1-1.2: configuration #1 chosen from 1 choice [ 229.301879] usb 1-1.2: adding 1-1.2:1.0 (config #1, interface 0) [ 229.308990] usb 1-1.2: adding 1-1.2:1.1 (config #1, interface 1) [ 229.340759] cdc_acm 1-1.2:1.0: usb_probe_interface [ 229.345886] cdc_acm 1-1.2:1.0: usb_probe_interface - got id [ 229.351928] cdc_acm 1-1.2:1.0: This device cannot do calls on its own. It is not a modem. [ 229.360961] cdc_acm 1-1.2:1.0: ttyACM0: USB ACM device [ 229.370269] usbcore: registered new interface driver cdc_acm [ 229.376281] cdc_acm: v0.26:USB Abstract Control Model driver for USB modems and ISDN adapters [ 602.088134] omapdss DISPC error: timeout waiting for EVSYNC [ 602.189697] omapdss DISPC error: timeout waiting for EVSYNC now, revert the roles: beagle: make it boot till login prompt panda: stop it at the u-boot prompt connect the usb plug to the beagle and the mini to the panda, on beagle console will appear: omap login: [ 14.907440] twl4030 operation mode cannot be changed on-the-fly [ 14.982788] twl4030 operation mode cannot be changed on-the-fly [ 22.216735] usb0: no IPv6 routers present [ 31.685821] usb 1-2.2: new full speed USB device using ehci-omap and address 4 [ 31.779541] usb 1-2.2: device descriptor read/64, error 18 [ 31.974700] usb 1-2.2: device descriptor read/64, error 18 [ 32.170166] usb 1-2.2: new full speed USB device using ehci-omap and address 5 [ 32.263824] usb 1-2.2: device descriptor read/64, error 18 [ 32.459136] usb 1-2.2: device descriptor read/64, error 18 [ 32.654510] usb 1-2.2: new full speed USB device using ehci-omap and address 6 [ 32.695495] usb 1-2.2: device descriptor read/8, error -61 [ 32.836364] usb 1-2.2: device descriptor read/8, error -61 [ 33.037292] usb 1-2.2: new full speed USB device using ehci-omap and address 7 [ 33.078369] usb 1-2.2: device descriptor read/8, error -61 [ 33.219116] usb 1-2.2: device descriptor read/8, error -61 [ 33.334045] hub 1-2:1.0: unable to enumerate USB device on port 2 software versions used: panda: Texas Instruments X-Loader 1.4.4ss (Mar 18 2011 - 14:14:59) ... U-Boot 2011.03-rc1 (Feb 09 2011 - 01:46:42) ... flag@omap:~$ uname -a Linux omap 2.6.38-1208-omap4 #11-Ubuntu SMP PREEMPT Fri Apr 15 16:34:35 UTC 2011 armv7l GNU/Linux beagle: Texas Instruments X-Loader 1.5.0 (Apr 11 2011 - 09:47:05) ... U-Boot 2011.03 (Apr 20 2011 - 07:19:53) ... tested kernels: Ubuntu 2.6.38-9.43-omap 2.6.38.4 and Ubuntu 2.6.35-29.51-omap 2.6.35.12 ** Affects: linux-ti-omap (Ubuntu) Importance: Undecided Status: New ** Tags: armel ** Tags added: armel -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/784474 Title: usb enumeration fail on beagleboard -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs