On Thu, Jun 20, 2024 at 11:58 AM Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> wrote: > > On Thu, Jun 20, 2024 at 11:25:43AM +0200, Giacinto Cifelli wrote: > > On Thu, Jun 20, 2024 at 8:41 AM Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> wrote: > > > > > On Thu, Jun 20, 2024 at 07:58:13AM +0200, Giacinto Cifelli wrote: > > > > > > greetings, > > > > > > > > > > > > question: > > > > > > > > > > > > on a system (yocto), I have a usb composition that doesn't assign the > > > > > > class for the interfaces: > > > > > > |__ Port 3: Dev 3, If 10, Class=, Driver=cdc_mbim, 480M > > > > > > |__ Port 3: Dev 3, If 8, Class=, Driver=cdc_acm, 480M > > > > > > |__ Port 3: Dev 3, If 6, Class=, Driver=cdc_acm, 480M > > > > > > |__ Port 3: Dev 3, If 4, Class=, Driver=cdc_acm, 480M > > > > > > |__ Port 3: Dev 3, If 2, Class=, Driver=cdc_acm, 480M > > > > > > |__ Port 3: Dev 3, If 11, Class=, Driver=cdc_mbim, 480M > > > > > > |__ Port 3: Dev 3, If 0, Class=, Driver=cdc_acm, 480M > > > > > > |__ Port 3: Dev 3, If 9, Class=, Driver=cdc_acm, 480M > > > > > > |__ Port 3: Dev 3, If 7, Class=, Driver=cdc_acm, 480M > > > > > > |__ Port 3: Dev 3, If 5, Class=, Driver=cdc_acm, 480M > > > > > > |__ Port 3: Dev 3, If 3, Class=, Driver=cdc_acm, 480M > > > > > > |__ Port 3: Dev 3, If 1, Class=, Driver=cdc_acm, 480M > > > > > > Kernel: Linux version 6.1.35 (oe-user@oe-host) (x86_64-poky-linux-gcc > > > > > > (GCC) 11.4.0, GNU ld (GNU Binutils) 2.38.20220708) #1 SMP > > > > > > PREEMPT_DYNAMIC Thu Jun 22 18:03:13 UTC 2023 > > > > > > > > > > > > instead of (arch): > > > > > > |__ Port 004: Dev 004, If 0, Class=Communications, Driver=cdc_acm, 5000M > > > > > > |__ Port 004: Dev 004, If 1, Class=CDC Data, Driver=cdc_acm, 5000M > > > > > > |__ Port 004: Dev 004, If 2, Class=Communications, Driver=cdc_acm, 5000M > > > > > > |__ Port 004: Dev 004, If 3, Class=CDC Data, Driver=cdc_acm, 5000M > > > > > > |__ Port 004: Dev 004, If 4, Class=Communications, Driver=cdc_acm, 5000M > > > > > > |__ Port 004: Dev 004, If 5, Class=CDC Data, Driver=cdc_acm, 5000M > > > > > > |__ Port 004: Dev 004, If 6, Class=Communications, Driver=cdc_acm, 5000M > > > > > > |__ Port 004: Dev 004, If 7, Class=CDC Data, Driver=cdc_acm, 5000M > > > > > > |__ Port 004: Dev 004, If 8, Class=Communications, Driver=cdc_acm, 5000M > > > > > > |__ Port 004: Dev 004, If 9, Class=CDC Data, Driver=cdc_acm, 5000M > > > > > > |__ Port 004: Dev 004, If 10, Class=Communications, Driver=cdc_mbim, 5000M > > > > > > |__ Port 004: Dev 004, If 11, Class=CDC Data, Driver=cdc_mbim, 5000M > > > > > > Kernel: Linux 6.6.34-1-lts #1 SMP PREEMPT_DYNAMIC Sun, 16 Jun 2024 > > > > > > 14:45:31 +0000 x86_64 GNU/Linux > > > > > > > > > > > > This lack of class creates too many /dev/ttyACMx ports, and > > > > > > ModemManager tries to access them all, perhaps also blocking the > > > > > > device, and the whole system doesn't work. > > > > > > > > > > > > For completeness, the device is: > > > > > > Bus 002 Device 004: ID 1e2d:0065 Gemalto M2M GmbH LTE Modem > > > > > > which is supported without any customs in the cdc-acm and cdc_mbim drivers. > > > > > > > > > > > > I spotted only two options not compiled-in in the yocto .config > > > > > > (compared with the arch one), but I strongly doubt this is related: > > > > > > CONFIG_USB_G_MULTI > > > > > > CONFIG_USB_G_MULTI_CDC > > > > > > > > > > > > Would you know why the class is not assigned? > > > > > > > > > > This is just a userspace issue, right? > > > > > > > > I think the class is assigned by the kernel/driver. > > > > > > > > > Or are you saying that somehow > > > > > the same device plugged into two different systems works differently? > > > > > > > > correct: the same device works differently in the two systems... in > > > > the sense of the class not assigned. > > > > > > It's not that it is not assigned, it's that something isn't figuring it > > > out properly. > > > > > > Can you provide the output of 'lsusb -v -d 1e2d:0065' for both systems? > > > > they seem ok with -v, I don't understand it. > > Nope, there are major differences, let's look at the start: > > -yocto: > +arch: > > -Bus 001 Device 003: ID 1e2d:0065 Cinterion LTE Modem > +Bus 002 Device 004: ID 1e2d:0065 Gemalto M2M GmbH LTE Modem > > Ok, this means that for your yocto system you probably do NOT have an > updated hw.ids package installed for lsusb to use to figure out a lot of > different things in text form. this could actually be the issue. I'll look into it. > Things like: > > bLength 18 > bDescriptorType 1 > - bcdUSB 2.00 > - bDeviceClass 239 > - bDeviceSubClass 2 > - bDeviceProtocol 1 > - bMaxPacketSize0 64 > - idVendor 0x1e2d > - idProduct 0x0065 > + bcdUSB 3.10 > + bDeviceClass 239 Miscellaneous Device > + bDeviceSubClass 2 [unknown] > + bDeviceProtocol 1 Interface Association > + bMaxPacketSize0 9 > + idVendor 0x1e2d Gemalto M2M GmbH > + idProduct 0x0065 LTE Modem > > > Class protocol defintions and the like. > > But what's MOST important here is that right away, you see that on your > yocto device you are running at a 2.0 USB speed, not a 3.1 speed, right? > > Perhaps that's the problem here? The device looks quite different for > when it is in a 3.1 supported system, with different configurations > possible, and a different length entirely: > > Configuration Descriptor: > bLength 9 > bDescriptorType 2 > - wTotalLength 0x01a9 > + wTotalLength 0x0215 > > Are you _SURE_ this is the same device? I would suggest getting your > yocto system updated and running at full USB 3 speeds and see if that > fixes the issues here. thanks for the hints, I will do my homework and let you know if I could fix the issue, It is not the same device, it is the same HW and FW, because it is soldered on the yocto system. As for usb2 vs usb3, it shouldn't be the issue, but i will find a usb2 hub or machine to confirm this, too. thank you again, Greg, Kind Regards, Giacinto
