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Diffstat (limited to 'marsond.rst')
| -rw-r--r-- | marsond.rst | 40 |
1 files changed, 29 insertions, 11 deletions
diff --git a/marsond.rst b/marsond.rst index c21554f..ad41577 100644 --- a/marsond.rst +++ b/marsond.rst @@ -18,15 +18,22 @@ Fix Enter key timing on Marson/USBLink/MT606-1 PS/2-USB adaptors SYNOPSIS ======== -marsond [**-d** *delay-ms**] [**-f**] [**-k** *keyboard-device*] [**-p** *pause_ms* [**-v**] | [**--help**] | [**--version**] | [**-V**] +marsond [**-d** *delay-ms*] [**-f**] [**-k** *keyboard-device*] [**-p** *pause_ms* [**-v**] | [**--help**] | [**--version**] | [**-V**] DESCRIPTION =========== -**marsond** fixes an issue with a particular model of PS/2 => USB -keyboard adaptor. The symptom: in games and emulators, the Enter key -only works sometimes. This is caused by the firmware in the adaptor -sending the keypress and release events only 8 milliseconds apart. +**marsond** fixes two issues with a particular model of PS/2 => USB +keyboard adaptor. The symptoms: + +- In games and emulators, the Enter key only works sometimes. This is + caused by the firmware in the adaptor sending the keypress and release + events only 8 milliseconds apart. + +- In normal use, pressing and releasing the right Shift key and Enter + key simultaneously causes the shift key to get "stuck" and act like + it's still being held down. + See the **NOTES** section for full details. For normal use, **marsond** will be started by a **udev**\(7) rule @@ -109,12 +116,18 @@ NOTES Hardware -------- -The problem happens with any SDL application (SDL1 or SDL2), as well -as other graphics libraries. It happens regardless of what PS/2 -keyboard you have plugged in, what computer you have the adaptor -plugged into, or what OS that computer is running. +The Enter key dropped keystroke problem happens with any SDL +application (SDL1 or SDL2), as well as other graphics libraries. It +happens regardless of what PS/2 keyboard you have plugged in, what +computer you have the adaptor plugged into, or what OS that computer +is running. -The specific hardware that has the Enter key problem for me is USB +The problem where Shift/Enter causes the Shift key to act "stuck" +happens in any application. It's particularly annoying because I'm an +inaccurate typist, and I hit Shift+Enter about 5% of the time when I'm +just trying to press Enter. + +The specific hardware that has the problems for me is USB vendor ID 04b4, product ID 0101, "Marson Keyboard and Mouse Link Ver:ps2120L". It has a label on the front that says "USBLink", and on the back, the model number is "MT606-1". It looks like: @@ -150,6 +163,11 @@ the real keyboard to the virtual one. When it sees the key release event for the Enter key, it simply pauses for a few milliseconds before delivering it. +It also keeps track of whether the last keypress was the right Shift +key, and when it sees an Enter keypress while right Shift is held +down, it sends a right Shift key release event before the Enter press +event. + This should work with everything that uses the keyboard. It definitely does, with SDL 1 and 2 running under X (and SDL 1 on the console, too). It should also work with Wayland, though I don't use Wayland, @@ -187,7 +205,7 @@ LIMITATIONS Only one MT-606-1 device is supported, out of the box. This shouldn't really be a problem (do you really need 2 keyboards?) but it's worth mentioning. If you really do own two of these adaptors and want to use -them on the same PC, you could add a second udev rule (with -k option +them on the same PC, you could add a second udev rule (with **-k** option for the daemon). This isn't really a **marsond** problem per se, but when Xorg detects |