https://bugs.kde.org/show_bug.cgi?id=503288
Bug ID: 503288
Summary: Android app is still very flaky with connecting to
computer
Classification: Applications
Product: kdeconnect
Version: unspecified
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: common
Assignee: albertv...@gmail.com
Reporter: n...@kde.org
CC: andrew.g.r.hol...@gmail.com
Target Milestone: ---
I previously had an issue whereby the phone and computer would briefly see each
other and then disappear, meaning they couldn't connect: Bug 502427. This got
fixed in version 1.33 of the Android app, and then I was able to pair them!
However since then, the connection is extremely flaky. I'd say that the two
devices can see one another maybe 10% of the time, and it feels very random.
I debugged this locally with Kristen McWilliam. Here were her conclusions,
which will hopefully be useful to a person smarter than me:
kdeconnectd receives a UDP packet with `LanLinkProvider::udpBroadcastReceived`
from the Android app. Looks like `LanLinkProvider::connectError` tries to make
a fallback connection but fails.
```
[ 15:06:41.960 ] kdeconnect.core: LanLinkProvider::udpBroadcastReceived 284:
Datagram
{"id":1745500002554,"type":"kdeconnect.identity","body":{"deviceId":"6de7082082df46769a00928a13601293","deviceName":"SM-G970U1","protocolVersion":8,"deviceType":"phone","incomingCapabilities":["kdeconnect.battery","kdeconnect.bigscreen.stt","kdeconnect.clipboard","kdeconnect.clipboard.connect","kdeconnect.contacts.request_all_uids_timestamps","kdeconnect.contacts.request_vcards_by_uid","kdeconnect.findmyphone.request","kdeconnect.mousepad.keyboardstate","kdeconnect.mousepad.request","kdeconnect.mpris","kdeconnect.mpris.request","kdeconnect.notification.request","kdeconnect.notification.reply","kdeconnect.notification.action","kdeconnect.ping","kdeconnect.notification","kdeconnect.runcommand","kdeconnect.sms.request","kdeconnect.telephony.request","kdeconnect.sms.request_conversations","kdeconnect.sms.request_conversation","kdeconnect.sms.request_attachment","kdeconnect.sftp.request","kdeconnect.share.request","kdeconnect.share.request.update","kdeconnect.systemvolume","kdeconnect.telephony.request_mute"],"outgoingCapabilities":["kdeconnect.battery","kdeconnect.mousepad.request","kdeconnect.bigscreen.stt","kdeconnect.clipboard","kdeconnect.clipboard.connect","kdeconnect.connectivity_report","kdeconnect.contacts.response_uids_timestamps","kdeconnect.contacts.response_vcards","kdeconnect.findmyphone.request","kdeconnect.mpris.request","kdeconnect.mpris","kdeconnect.notification","kdeconnect.ping","kdeconnect.presenter","kdeconnect.notification.request","kdeconnect.mousepad.echo","kdeconnect.mousepad.keyboardstate","kdeconnect.runcommand.request","kdeconnect.sms.messages","kdeconnect.sms.attachment_file","kdeconnect.sftp","kdeconnect.share.request","kdeconnect.systemvolume.request","kdeconnect.telephony"],"tcpPort":1716}}
```
```
[ 15:06:41.960 ] kdeconnect.core: LanLinkProvider::udpBroadcastReceived 332:
Received Udp identity packet from QHostAddress("::ffff:100.64.0.153") asking
for a tcp connection on port 1716
[ 15:06:48.144 ] kdeconnect.core: LanLinkProvider::connectError 360: Socket
error QAbstractSocket::NetworkError
[ 15:06:48.144 ] kdeconnect.core: LanLinkProvider::connectError 361: Fallback
(1), try reverse connection (send udp packet) "Host unreachable"
```
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