HID: usbhid: Insert USB bus/device ID into HID name #6356
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libinput/wlroots/Wayfire/labwc match input device by the device name only. If you add 2 identical USB connected touch devices, you can't select between them. Add the usb bus&device name to the start of the name so that the names end up being unique, Signed-off-by: Dave Stevenson <[email protected]>
pelwell
reviewed
Sep 12, 2024
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| if (dev->product) { | ||
| if (dev->manufacturer) | ||
| strlcat(hid->name, " ", sizeof(hid->name)); | ||
| strlcat(hid->name, dev->product, sizeof(hid->name)); | ||
| } | ||
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| if (!strlen(hid->name)) | ||
| snprintf(hid->name, sizeof(hid->name), "HID %04x:%04x", | ||
| if (strlen(hid->name) == strlen(dev_name(&dev->dev))) |
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Given the snprintf above, and the fact that other changes just append, how can this condition ever be true?
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It can't.
Too many revisions switching from strscpy to snprintf (to add the usb- prefix), and missing updating this condition.
Ideally this issue wants to be sorted further up the stack (xinput was always happy with multiple identical devices, although you had to reference them by id number rather than name), so I'll have a word with Simon and David T later on.
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Draft as this isn't ideal - it renames all mouse and keyboard devices, as well as touch ones.
libinput/wlroots/Wayfire/labwc match input device by the device name only. If you add 2 identical USB connected touch devices, you can't select between them.
Add the usb bus&device name to the start of the name so that the names end up being unique,
https://forums.raspberrypi.com/viewtopic.php?t=376569