I find obexftp does not work fine with the same sympton
So I use strace to find out what happen
After cold booting up, the trace log looks like
...
brk(0x95f2000) = 0x95f2000
socket(PF_BLUETOOTH, SOCK_SEQPACKET, 0) = 3
bind(3, {sa_family=AF_BLUETOOTH,
sa_data="\0\0\333\v\322N#\0\316\356\310\277\6\0"}, 10) = 0
connect(3, {sa_family=AF_BLUETOOTH,
sa_data="\1\0g\240L\337\37\0\316\356\310\277\6\0"}, 10) = -1 ECONNRESET
(Connection reset by peer)
close(3) = 0
dup(2) = 3
...
After suspend-to-ram/resume the trace log looks like
...
write(2, "Connecting...", 13Connecting...) = 13
socket(PF_BLUETOOTH, SOCK_STREAM, 3) = 3
bind(3, {sa_family=AF_BLUETOOTH, sa_data="\0\0\0\0\0\0\0\0\0\0\0\0\0\0"}, 10) = 0
connect(3, {sa_family=AF_BLUETOOTH, sa_data="g\240L\337\37\0\6\0\0\0\0\0\0\0"},
10) = 0
write(3, "\200\0\32\20\0\4\0F\0\23\371\354{\304\225<\21\322\230N"..., 26) = 26
select(4, [3], NULL, NULL, {20, 0}) = 1 (in [3], left {19, 896000})
read(3, "\240\0\37", 3) = 3
read(3, "\2...@\0\313\303\17\245\226j\0\23\371\354{\304\225<\21"..., 28) = 28
...
Looks like I shall dig into kernel/net/bluetooth
--
[Welch's] Dell Bluetooth BT365 + ICH7 + ubuntu 8.10 BT file transfer fails
https://bugs.launchpad.net/bugs/390941
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