049f:505a — Linux-USB "CDC Subset" Device, or Itsy (experimental)
Compaq Computer Corp.
- Vendor ID
- 049f
- Product ID
- 505a
- Combined
- 049f:505a
- Decimal
- 1183:20570
What is this device?
This is the USB identifier for a Linux-USB "CDC Subset" Device, or Itsy (experimental) manufactured by Compaq Computer Corp.. The vendor ID 049f is registered to Compaq Computer Corp. with the USB Implementers Forum, and 505a is the product ID that Compaq Computer Corp. assigned to this particular model. When you run lsusb on Linux, this device appears as 049f:505a Compaq Computer Corp. Linux-USB "CDC Subset" Device, or Itsy (experimental).
How to identify it on your system
Linux
$ lsusb Bus 001 Device 004: ID 049f:505a Compaq Computer Corp. Linux-USB "CDC Subset" Device, or Itsy (experimental)
You can filter directly with lsusb -d 049f:505a, or get the full descriptor dump with lsusb -v -d 049f:505a. Kernel messages from dmesg show the same pair as idVendor=049f, idProduct=505a.
Windows
In Device Manager, open the device, go to Details → Hardware Ids. This device reports:
USB\VID_049F&PID_505A USB\VID_049F&PID_505A&REV_0100
From PowerShell: Get-PnpDevice | Where-Object InstanceId -match "VID_049F&PID_505A"
macOS
$ system_profiler SPUSBDataType
Linux-USB "CDC Subset" Device, or Itsy (experimental):
Product ID: 0x505a
Vendor ID: 0x049f (Compaq Computer Corp.)Driver help
Having driver issues with this device? Most USB devices are handled by a generic class driver; if yours shows up as an unknown device, confirm the ID above first, then check the manufacturer's downloads page.
Raw usb.ids entry
The exact lines this page is generated from, in the upstream source file:
049f Compaq Computer Corp. 505a Linux-USB "CDC Subset" Device, or Itsy (experimental)