Details
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Bug
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Resolution: Invalid
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Not Evaluated
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None
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5.15.13, 5.15.10, 6.5.0
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None
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Debian 11.7 amd64
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Linux/X11
Description
Looks like after Debian 11.7 updates udev output have changed, and QSerialPortInfo() now returns Intel CPU vendor/product id's instead of actual USB serial ports.
For example, if we have this code:
#include <QDebug> #include <QSerialPortInfo> int main() { for (const QSerialPortInfo& info: QSerialPortInfo::availablePorts()) qDebug().nospace().noquote() << "vid = 0x" << QString::number(info.vendorIdentifier(), 16) << ", pid = 0x" << QString::number(info.productIdentifier()); }
With these two USB serial devices attached:
# udevadm info /dev/ttyUSB0 P: /devices/pci0000:00/0000:00:14.0/usb1/1-5/1-5:1.0/ttyUSB0/tty/ttyUSB0 N: ttyUSB0 L: 0 S: serial/by-path/pci-0000:00:14.0-usb-0:5:1.0-port0 E: DEVPATH=/devices/pci0000:00/0000:00:14.0/usb1/1-5/1-5:1.0/ttyUSB0/tty/ttyUSB0 E: DEVNAME=/dev/ttyUSB0 E: MAJOR=188 E: MINOR=0 E: SUBSYSTEM=tty E: USEC_INITIALIZED=268864506971 E: ID_BUS=pci E: ID_VENDOR_ID=0x8086 E: ID_MODEL_ID=0x43ed E: ID_PCI_CLASS_FROM_DATABASE=Serial bus controller E: ID_PCI_SUBCLASS_FROM_DATABASE=USB controller E: ID_PCI_INTERFACE_FROM_DATABASE=XHCI E: ID_VENDOR_FROM_DATABASE=Intel Corporation E: ID_PATH=pci-0000:00:14.0-usb-0:5:1.0 E: ID_PATH_TAG=pci-0000_00_14_0-usb-0_5_1_0 E: ID_USB_MODEL=USB2.0-Ser_ E: ID_USB_MODEL_ENC=USB2.0-Ser\x21 E: ID_USB_MODEL_ID=7523 E: ID_USB_SERIAL=1a86_USB2.0-Ser_ E: ID_USB_VENDOR=1a86 E: ID_USB_VENDOR_ENC=1a86 E: ID_USB_VENDOR_ID=1a86 E: ID_USB_REVISION=0254 E: ID_USB_TYPE=generic E: ID_USB_INTERFACES=:ff0102: E: ID_USB_INTERFACE_NUM=00 E: ID_USB_DRIVER=ch341 E: ID_MM_CANDIDATE=1 E: DEVLINKS=/dev/serial/by-path/pci-0000:00:14.0-usb-0:5:1.0-port0 E: TAGS=:systemd: E: CURRENT_TAGS=:systemd:
# udevadm info /dev/ttyACM0 P: /devices/pci0000:00/0000:00:14.0/usb1/1-7/1-7:1.0/tty/ttyACM0 N: ttyACM0 L: 0 S: serial/by-path/pci-0000:00:14.0-usb-0:7:1.0 E: DEVPATH=/devices/pci0000:00/0000:00:14.0/usb1/1-7/1-7:1.0/tty/ttyACM0 E: DEVNAME=/dev/ttyACM0 E: MAJOR=166 E: MINOR=0 E: SUBSYSTEM=tty E: USEC_INITIALIZED=267816820604 E: ID_BUS=pci E: ID_VENDOR_ID=0x8086 E: ID_MODEL_ID=0x43ed E: ID_PCI_CLASS_FROM_DATABASE=Serial bus controller E: ID_PCI_SUBCLASS_FROM_DATABASE=USB controller E: ID_PCI_INTERFACE_FROM_DATABASE=XHCI E: ID_VENDOR_FROM_DATABASE=Intel Corporation E: ID_PATH=pci-0000:00:14.0-usb-0:7:1.0 E: ID_PATH_TAG=pci-0000_00_14_0-usb-0_7_1_0 E: ID_USB_MODEL=Numato_Lab_8_Channel_USB_GPIO_Module E: ID_USB_MODEL_ENC=Numato\x20Lab\x208\x20Channel\x20USB\x20GPIO\x20Module E: ID_USB_MODEL_ID=0800 E: ID_USB_SERIAL=Numato_Systems_Pvt._Ltd._Numato_Lab_8_Channel_USB_GPIO_Module_NLGP210915A0045 E: ID_USB_SERIAL_SHORT=NLGP210915A0045 E: ID_USB_VENDOR=Numato_Systems_Pvt._Ltd. E: ID_USB_VENDOR_ENC=Numato\x20Systems\x20Pvt.\x20Ltd. E: ID_USB_VENDOR_ID=2a19 E: ID_USB_REVISION=0100 E: ID_USB_TYPE=generic E: ID_USB_INTERFACES=:020201:0a0000: E: ID_USB_INTERFACE_NUM=00 E: ID_USB_DRIVER=cdc_acm E: ID_MM_CANDIDATE=1 E: DEVLINKS=/dev/serial/by-path/pci-0000:00:14.0-usb-0:7:1.0 E: TAGS=:systemd: E: CURRENT_TAGS=:systemd:
Application actually prints:
vid = 0x8086, pid = 0x17389 vid = 0x8086, pid = 0x17389 vid = 0x0, pid = 0x0
Ignoring zeroes for now, first two should be 0x1a86 0x7523 for "noname" one and 0x2a19 0x0100 for Numato GPIO serial device. But we get Intel CPU vendor/model!?
On older Udev, there where no ID_USB_X keys, so I guess that's the core issue - Qt needs to parse udev data differently now, i.e. use ID_USB_X if available instead of ID_VENDOR_ID/ID_MODEL_ID ?
You can find older udev output that worked on my Debian bug report: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1035551