RE: Dell XPS 13 Fn key bug?

-----Original Message-----
From: Ignacy Gawędzki [mailto:bugs@qult.net]
Sent: Thursday, February 2, 2017 11:08 AM
To: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Limonciello, Mario <redacted>; linux-
input@vger.kernel.org
Subject: Re: Dell XPS 13 Fn key bug?

On Thu, Feb 02, 2017 at 08:47:48AM -0800, thus spake Dmitry Torokhov:

quoted

On Thu, Feb 02, 2017 at 09:40:33AM +0100, Ignacy Gawędzki wrote:

quoted

On Wed, Feb 01, 2017 at 04:16:13PM -0800, thus spake Dmitry Torokhov:

quoted

OK, so 'cd' is scancode for KEY_RIGHT and 'cf' is scancode for
KEY_END, and it seems that implementation of FN handling is very
naive as it emits "release" keycodes for the state FN is currently
in, not the state it was when key was pressed.

Ideally Dell would fix that. Mario, any chance of that?

I'm just wondering whether this is still something that could be
fixed or worked around in the input driver,

Well, obviously I'd rather fix the bug at its root rather than piling
workarounds in the driver.

Sure, but supposing that the BIOS has to be fixed, I don't expect Dell to release
a fix for a model that's about five years old.  Unless there's a good soul out
there reading this and able to do anything about it.

There hasn't been any maintenance BIOS releases for the L322X since around the
end of 2013.
I won't be able to get anyone to spin up resources on this unless it was a major 
security vulnerability or proverbial kitten killer type of bug.

quoted

quoted

since the bug obviously doesn't
show up in neither in the linux console nor in Windows.

So where does it not work in Linux? Because keyboard driver in console
and elsewhere is the same. Maybe it is not noticeable when in text
console?

The bug appears only in X11.  Not in the console, although autorepeat is active
there too.

quoted

In Windows the bug might be masked if they use hardware autorepeat for
PS/2 keyboards. I don't know if they do or not.

I have no idea either.

--
To err is human, to purr feline.