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notes.txt
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After all these years of this technique working perfectly, libinput goes and breaks it (along with apparantly many other things):
https://bugs.freedesktop.org/show_bug.cgi?id=104030
A normal USB keyboard pressing shift+3:
E: 0.000001 0004 0004 458977 # EV_MSC / MSC_SCAN 458977
E: 0.000001 0001 002a 0001 # EV_KEY / KEY_LEFTSHIFT 1
E: 0.000001 0000 0000 0000 # ------------ SYN_REPORT (0) ---------- +0ms
E: 0.151990 0004 0004 458784 # EV_MSC / MSC_SCAN 458784
E: 0.151990 0001 0004 0001 # EV_KEY / KEY_3 1
E: 0.151990 0000 0000 0000 # ------------ SYN_REPORT (0) ---------- +151ms
#E: 0.327930 0004 0004 458784 # EV_MSC / MSC_SCAN 458784
E: 0.327930 0001 0004 0000 # EV_KEY / KEY_3 0
E: 0.327930 0000 0000 0000 # ------------ SYN_REPORT (0) ---------- +176ms
E: 0.400020 0004 0004 458977 # EV_MSC / MSC_SCAN 458977
E: 0.400020 0001 002a 0000 # EV_KEY / KEY_LEFTSHIFT 0
E: 0.400020 0000 0000 0000 # ------------ SYN_REPORT (0) ---------- +73ms
rusty-keys pre SYN_REPORT fix:
E: 0.000001 0001 002a 0001 # EV_KEY / KEY_LEFTSHIFT 1
E: 0.000001 0001 001a 0001 # EV_KEY / KEY_LEFTBRACE 1
E: 0.000001 0000 0000 0000 # ------------ SYN_REPORT (0) ---------- +0ms
{E: 0.031945 0001 001a 0000 # EV_KEY / KEY_LEFTBRACE 0
E: 0.031945 0001 002a 0000 # EV_KEY / KEY_LEFTSHIFT 0
E: 0.031945 0000 0000 0000 # ------------ SYN_REPORT (0) ---------- +31ms
rusty-keys post SYN_REPORT fix:
E: 0.000001 0001 002a 0001 # EV_KEY / KEY_LEFTSHIFT 1
E: 0.000001 0000 0000 0000 # ------------ SYN_REPORT (0) ---------- +0ms
E: 0.000032 0001 001a 0001 # EV_KEY / KEY_LEFTBRACE 1
E: 0.000032 0000 0000 0000 # ------------ SYN_REPORT (0) ---------- +0ms
{E: 0.096031 0001 001a 0000 # EV_KEY / KEY_LEFTBRACE 0
E: 0.096031 0000 0000 0000 # ------------ SYN_REPORT (0) ---------- +96ms
E: 0.096091 0001 002a 0000 # EV_KEY / KEY_LEFTSHIFT 0
E: 0.096091 0000 0000 0000 # ------------ SYN_REPORT (0) ---------- +0ms
Seems to be good enough for now...