Emulator

Game Name?

Super Smash Bros. Melee

Game ID? (right click the game in the game list, properties, info tab)

GALE01

MD5 Hash? (right click the game in the game list, properties, info tab, MD5 Hash: Compute)

0e63d4223b01d9aba596259dc155a174

What's the problem? Describe what went wrong.

Regardless of range and other configurations, the game ignores the control stick modifier key for any direction except right. Dashing is initiated instead of walking.

Which versions of Dolphin did you test on? Does using an older version of Dolphin solve your issue? If yes, which versions of Dolphin used to work?

4.0 and 5.0

What are your PC specifications? (CPU, GPU, Operating System, more)

Intel Core i5 Haswell with integrated GPU

from the 'uname -a' command:
Linux 3.19.0-42-generic #48~14.04.1-Ubuntu SMP Fri Dec 18 10:24:49 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

Is there any other relevant information? (e.g. logs, screenshots,
configuration files)

from ~/.dolphin-emu/Config/GCPadNew.ini:

[GCPad1]
Device = Xlib/0/Keyboard Mouse
Buttons/A = X
Buttons/B = Z
Buttons/X = C
Buttons/Y = S
Buttons/Z = D
Buttons/Start = !Alt_L & Return
Main Stick/Up = Up
Main Stick/Down = Down
Main Stick/Left = Left
Main Stick/Right = Right
C-Stick/Up = I
C-Stick/Down = K
C-Stick/Left = J
C-Stick/Right = L
C-Stick/Modifier = Control_L
C-Stick/Modifier/Range = 50.000000
Triggers/L = Q
Triggers/R = W
D-Pad/Up = T
D-Pad/Down = G
D-Pad/Left = F
D-Pad/Right = H
Main Stick/Modifier/Range = 40.000000
Main Stick/Modifier = Shift_L