Unable to upgrade firmware from 2025-01-26

I updated glasgow from 2a67f79d6025a06e98277956cbb036c4237960f1 to 8a61053c7b7ff241c096eba68c6ab8fc0e0389f7 in https://github.com/NixOS/nixpkgs/pull/382355. When plugging in, the Glasgow reports in `dmesg`: ``` [199450.331893] usb 1-1: new high-speed USB device number 2 using xhci-hcd [199450.457340] usb 1-1: New USB device found, idVendor=20b7, idProduct=9db1, bcdDevice= 3.33 [199450.457346] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [199450.457350] usb 1-1: Product: Glasgow Interface Explorer (git f050f518) [199450.457353] usb 1-1: Manufacturer: 1BitSquared [199450.457355] usb 1-1: SerialNumber: C3-20241011T135145Z ``` I got prompted to upgrade the firmware, but had issues with `glasgow flash` running into timeouts: ``` I: g.hardware.device: found revC3 device with API level 3 (supported API level is 4) W: g.hardware.device: please run `glasgow flash` to update firmware of device C3-20241011T135145Z W: g.hardware.device: device 001/002 did not re-enumerate after firmware upload E: g.cli: device not found ``` [g.cli-device-not-found.pcapng.zip](https://github.com/user-attachments/files/21473716/g.cli-device-not-found.pcapng.zip) When running a second time (without replugging), I get the following error: ``` I: g.hardware.device: found revC3 device with API level 3 (supported API level is 4) Traceback (most recent call last): File "/nix/store/qc8hf88wdf4f8ijvnxqk0zhcpzbxhdmr-glasgow-0-unstable-2025-07-28/lib/python3.13/site-packages/glasgow/support/usb/libusb1.py", line 58, in wrapper return f(*args, **kwargs) File "/nix/store/qc8hf88wdf4f8ijvnxqk0zhcpzbxhdmr-glasgow-0-unstable-2025-07-28/lib/python3.13/site-packages/glasgow/support/usb/libusb1.py", line 206, in serial_number self._serial_number = self._ensure_open.getASCIIStringDescriptor( ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^ self._impl_device.getSerialNumberDescriptor()) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/nix/store/bpqzv0gm5wcgxx7j637gh4wf9wjr86wj-python3.13-libusb1-3.3.1/lib/python3.13/site-packages/usb1/__init__.py", line 1364, in getASCIIStringDescriptor received = mayRaiseUSBError(libusb1.libusb_get_string_descriptor_ascii( self.__handle, descriptor, create_binary_buffer(descriptor_string)[0], STRING_LENGTH, )) File "/nix/store/bpqzv0gm5wcgxx7j637gh4wf9wjr86wj-python3.13-libusb1-3.3.1/lib/python3.13/site-packages/usb1/__init__.py", line 129, in mayRaiseUSBError __raiseUSBError(value) ~~~~~~~~~~~~~~~^^^^^^^ File "/nix/store/bpqzv0gm5wcgxx7j637gh4wf9wjr86wj-python3.13-libusb1-3.3.1/lib/python3.13/site-packages/usb1/__init__.py", line 121, in raiseUSBError raise __STATUS_TO_EXCEPTION_DICT.get(value, __USBError)(value) usb1.USBErrorTimeout: LIBUSB_ERROR_TIMEOUT [-7] The above exception was the direct cause of the following exception: Traceback (most recent call last): File "/nix/store/qc8hf88wdf4f8ijvnxqk0zhcpzbxhdmr-glasgow-0-unstable-2025-07-28/bin/.glasgow-wrapped", line 9, in <module> sys.exit(run_main()) ~~~~~~~~^^ File "/nix/store/qc8hf88wdf4f8ijvnxqk0zhcpzbxhdmr-glasgow-0-unstable-2025-07-28/lib/python3.13/site-packages/glasgow/cli.py", line 1056, in run_main exit(asyncio.new_event_loop().run_until_complete(main())) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^ File "/nix/store/chgczp3c2zsr14bxkx9vfwsywajbgbgg-python3-3.13.5/lib/python3.13/asyncio/base_events.py", line 725, in run_until_complete return future.result() ~~~~~~~~~~~~~^^ File "/nix/store/qc8hf88wdf4f8ijvnxqk0zhcpzbxhdmr-glasgow-0-unstable-2025-07-28/lib/python3.13/site-packages/glasgow/cli.py", line 605, in main device = await GlasgowDevice.find(args.serial) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/nix/store/qc8hf88wdf4f8ijvnxqk0zhcpzbxhdmr-glasgow-0-unstable-2025-07-28/lib/python3.13/site-packages/glasgow/hardware/device.py", line 187, in find usb_devices = await cls._enumerate_devices(usb_context) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/nix/store/qc8hf88wdf4f8ijvnxqk0zhcpzbxhdmr-glasgow-0-unstable-2025-07-28/lib/python3.13/site-packages/glasgow/hardware/device.py", line 114, in _enumerate_devices device.serial_number) ^^^^^^^^^^^^^^^^^^^^ File "/nix/store/qc8hf88wdf4f8ijvnxqk0zhcpzbxhdmr-glasgow-0-unstable-2025-07-28/lib/python3.13/site-packages/glasgow/support/usb/libusb1.py", line 60, in wrapper map_error(err) ~~~~~~~~~^^^^^ File "/nix/store/qc8hf88wdf4f8ijvnxqk0zhcpzbxhdmr-glasgow-0-unstable-2025-07-28/lib/python3.13/site-packages/glasgow/support/usb/libusb1.py", line 45, in map_error raise Error(str(error)) from error glasgow.support.usb.Error: LIBUSB_ERROR_TIMEOUT [-7] ``` [g.cli-device-not-found-then-libusb_timeout.pcapng.zip](https://github.com/user-attachments/files/21474056/g.cli-device-not-found-then-libusb_timeout.pcapng.zip) I was only able to reproduce when having the older firmware present; running `glasgow flash --remove-firmware` with the new glasgow version was not sufficient. I reproduced this by building nixpkgs' on current `master` (which uses the upstream `.ihex` file "git f050f518" due to a packaging bug), and by building https://github.com/NixOS/nixpkgs/pull/382355 (which produces the same firmware as upstream), by invoking `sudo $(nix-build -A glasgow)/bin/glasgow flash` with a commit before and after the bump to `0-unstable-2025-07-28`. [^1] [^1]: Contrary to the older reports in https://github.com/GlasgowEmbedded/glasgow/pull/958, I was also able to reproduce the issues with the parent commit of that PR.