SSH into Pi always fails on first attempt

Question

I use PuTTY and a Wi-Fi dongle to SSH into my Pi. It ALWAYS times out on the first attempt and then when I close PuTTY and re-open it, I can SSH into the Pi.

Any ideas why this is happening?

EDIT:

iwconfig:

wlan0     IEEE 802.11bgn  ESSID:"Tom"  Nickname:"<WIFI@REALTEK>"
          Mode:Managed  Frequency:2.442 GHz  Access Point: 30:46:9A:A2:59:D6
          Bit Rate:72.2 Mb/s   Sensitivity:0/0
          Retry:off   RTS thr:off   Fragment thr:off
          Encryption key:****-****-****-****-****-****-****-****   Security mode:open
          Power Management:off
          Link Quality=100/100  Signal level=85/100  Noise level=0/100
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

lo        no wireless extensions.

eth0      no wireless extensions.

lsusb:

Bus 001 Device 004: ID 0bda:8176 Realtek Semiconductor Corp. RTL8188CUS 802.11n WLAN Adapter
Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp. SMSC9512/9514 Fast Ethernet Adapter
Bus 001 Device 002: ID 0424:9514 Standard Microsystems Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

do you mean first attempt after booting? wait a little longer after booting maybe? — Jaromanda X, Apr 22 '16 at 04:12
@JaromandaX It doesn't matter how long I wait. I could wait 10 minutes and I cant ssh into it first attempt.
JayEye how do i get the session log? — user2570937, Apr 22 '16 at 05:43

score 2 · Answer 1 · edited Apr 13 '17 at 12:56

2

Probably you got power saving mode enabled in your WiFi dongle.

You can check it in sudo iwconfig and turn it off: sudo iwconfig wlan0 power off , where wlan0 is your wifi card name in iwconfig list.

If it doesn't help tell us more about your WiFi dongle. Post iwconfig and lsusb by editing your post.

@Edit: Here was similar issue and this post helped:

edited Apr 13 '17 at 12:56

Community

1

answered Apr 22 '16 at 06:22

Huczu

1,251
9
13

I updated the post with info. When i tried running the power off command I got SET failed on device wlan0 ; Operation not permitted. And I ran it as sudo – user2570937 Apr 23 '16 at 01:56
Thanks for update. Here someone had similar issue with the same chipset and this post helped: http://raspberrypi.stackexchange.com/a/7760/42034 . – Huczu Apr 23 '16 at 10:55

score 1 · Accepted Answer · answered Apr 24 '21 at 06:35

1

Pi4,I use this command:

 sudo iw dev wlan0 set power_save off

answered Apr 24 '21 at 06:35

menxin

126
3

SSH into Pi always fails on first attempt

2 Answers2