Hi, I'm having a weird issue with both the Corsair K65 and K70 USB keyboards. If I release shift before the backslash key when typing a pipe | character it ends up writing |\\. In windows it works fine even though there is no special driver or software that needs to be installed.. Others have reported the same thing for the corsair K60 and K90 as well, so it seems to impact their entire keyboard line.. see: http://forum.corsair.com/v3/showthread.php?t=119654 In the thread above someone posted a patch which ignores the spurious key release message from the keyboard. I've tested it and it works great, but I guess it would cause problems with other brands of keyboards. Any idea what the 'propper' fix might be? It shows up in dmesg like this (kernel 3.12.13): usb 7-1.3: new full-speed USB device number 18 using ehci-pci usb 7-1.3: New USB device found, idVendor=1b1c, idProduct=1b09 usb 7-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0 usb 7-1.3: Product: Corsair K70R Gaming Keyboard [12900.943155] usb 7-1.3: Manufacturer: Corsair input: Corsair Corsair K70R Gaming Keyboard as /devices/pci0000:00/0000:00:1a.7/usb7/7-1/7-1.3/7-1.3:1.0/input/input51 hid-generic 0003:1B1C:1B09.0006: input,hidraw0: USB HID v1.11 Keyboard [Corsair Corsair K70R Gaming Keyboard] on usb-0000:00:1a.7-1.3/input0 input: Corsair Corsair K70R Gaming Keyboard as /devices/pci0000:00/0000:00:1a.7/usb7/7-1/7-1.3/7-1.3:1.1/input/input52 hid-generic 0003:1B1C:1B09.0007: input,hidraw2: USB HID v1.11 Device [Corsair Corsair K70R Gaming Keyboard] on usb-0000:00:1a.7-1.3/input1 input: Corsair Corsair K70R Gaming Keyboard as /devices/pci0000:00/0000:00:1a.7/usb7/7-1/7-1.3/7-1.3:1.2/input/input53 hid-generic 0003:1B1C:1B09.0008: input,hidraw3: USB HID v1.11 Keyboard [Corsair Corsair K70R Gaming Keyboard] on usb-0000:00:1a.7-1.3/input2 Below is a copy of 'Beijmn's post in the above forum: --------------------------------------------------------------------- I purchased a Corsair Vengeance K70B keyboard the other day and noticed the same issues in Arch Linux. I don't know a lot about the Linux kernel, HID, or keyboards in general so bear with me. In HID it seems there is a constant flow of updates for keys informing if they are pressed or not. All of the keys seem ok but the one exception is the backslash key. After depressing the key, a message update is sent saying it was depressed but IMMEDIATELY after another message is sent saying it is lifted up. It seems backslash is the only key that does this. I have whipped up a quick hack for hid-core.c in the linux kernel. All it does is ignore this message. A more permanent and cleaner solution is to provide a custom hid-vengeance driver. Posting messes the whole format up but you get the idea. --- drivers/hid/hid-core.c 2014-01-19 16:27:37.674829730 -0500 +++ hid-core_patched.c 2014-01-19 16:24:39.992006709 -0500 @@ -1130,6 +1130,14 @@ { struct hid_driver *hdrv = hid->driver; int ret; + static bool skip = false; + + if (skip) { + skip = false; + return; + } + if (usage->code == KEY_BACKSLASH && value == 1) + skip = true; if (!list_empty(&hid->debug_list)) hid_dump_input(hid, usage, value); --------------------------------------------------------------------- Thanks, Norbert -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
