[Bug 1817063] Re: Silent "Unknown key" message when pressing keyboard backlight hotkey

** Changed in: linux (Ubuntu Bionic)
Status: Confirmed => Fix Committed

** Changed in: linux (Ubuntu Cosmic)
Status: Confirmed => Fix Committed

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https://bugs.launchpad.net/bugs/1817063

Title:
Silent "Unknown key" message when pressing keyboard backlight hotkey

Status in HWE Next:
New
Status in linux package in Ubuntu:
Fix Committed
Status in linux source package in Bionic:
Fix Committed
Status in linux source package in Cosmic:
Fix Committed
Status in linux source package in Disco:
Fix Committed
Status in linux source package in EE-Series:
New

Bug description:
[Impact]
Kernel message shows this once keyboard backlight hotkey gets pressed:
[ 3285.474172] dell_wmi: Unknown key with type 0x0010 and code 0x003f pressed
It's for notification purpose, doesn't have any function.

[Fix]
Use KE_IGNORE for this type of event, so the keymap won't parse it.

[Test]
Once the patch is applied, the annoyance goes away.

[Regression Potential]
Low. This patch silence the useless message, no functional change.

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