From: Andrey Butirsky <email@example.com> To: firstname.lastname@example.org Subject: first keystroke of BT-keyboards is missed Date: Wed, 30 Jan 2019 22:45:42 +0300 Message-ID: <email@example.com> (raw) On Tue, 21 Jan 2014 12:32:45 +0100, Alexander Holler <holler@xxxxxxxxxxxxx <mailto:holler@DOMAIN.HIDDEN>> wrote: > Hello, > > I can't remember since when I'm seeing the kernel message "unknown > main item tag 0x0" for many Bluetooth input devices, but it is since > quiet some time. > Has someone already tried to find out where that does come from? > > My first guess would be that bluez misses one or more bytes a > connection startup, which is based on the fact that, since ever, it > misses the first keystroke of BT-keyboards too (the keystroke which > wakes up the keyboard and initiates the connection). And I'm pretty > sure my keyboard does transmit that initiating keystroke, because > Windows receives it. ;) Besides that, that guess isn't based on > anything. I neither have tried to search through the source nor did I > run some tests. But because I'm curious I can't completely ignore that > kernel message, even if I haven't experienced any obvious problems. So > here is the question if someone else has a pointer or has already > searched what the reason for that message is. I don't think it's a > fault of the used device(s), as I see this message for multiple > bt-input-devices. Hi, I have the same described problem - after BT-keyboard idle(10 min), the first keystroke is missed, with "unknown main item tag 0x0" message in log. On the same system, Windows 10 doesn't have the problem - the keystroke shows up successfully after reconnect. Also, the same BT keyboard doesn't miss the keystroke with my Android phone (it re-connects still). This bug is very annoying, as I can't use my keyboard properly. Any suggestion on problem resolving? I'm ready to assist in debug it further. Thanks.
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