Why the xcb_get_setup return the null pointer

[bupt-steven]

mm-delay 100 mm-link /home/netlab/TCPgame/180917/env/ATT-LTE-driving.down /home/netlab/TCPgame/180917/env/ATT-LTE-driving.down --meter-downlink --downlink-queue=droptail --downlink-queue-args=packets=140 -- sh -c 'python /home/netlab/TCPgame/180917/env/run_receiver.py $MAHIMAHI_BASE 57083'

Died on std::runtime_error: xcb_get_setup: returned null pointer Died on std::runtime_error: downlink': process exited with failure status 1 Died on std::runtime_error:mm-link /home/netlab/TCPgame/180917/env/ATT-LTE-driving.down /home/netlab/TCPgame/180917/env/ATT-LTE-driving.down --meter-downlink --downlink-queue=droptail --downlink-queue-args=packets=140 -- sh -c python /home/netlab/TCPgame/180917/env/run_receiver.py $MAHIMAHI_BASE 57083': process exited with failure status 1 Died on std::runtime_error: `packetshell': process exited with failure status 1

[keithw]

This indicates an X11 error (xcb_get_setup: returned null pointer) trying to launch the downlink meter you requested (--meter-downlink).

What is your DISPLAY environment variable? Can xlogo successfully pop up a window?

[bupt-steven]

Thanks, I know what happened.

[miqianmimi]

could any one tell me why this happen ?

[miqianmimi]

may any tell me i already installed mahimahi ,but when i use

mm-delay 20 mm-link --meter-all /usr/share/mahimahi/traces/Verizon-LTE-short.up /usr/share/mahimahi/traces/Verizon-LTE-short.down

and i got error >

Died on std::runtime_error: xcb_get_setup: returned null pointer
Died on std::runtime_error: xcb_get_setup: returned null pointer
Died on std::runtime_error: downlink': process exited with failure status 1 Died on std::runtime_error: mm-link --meter-all /usr/share/mahimahi/traces/Verizon-LTE-short.up /usr/share/mahimahi/traces/Verizon-LTE-short.down': process exited with failure status 1
Died on std::runtime_error: `packetshell': process exited with failure status 1

i don't know why .

[keithw]

This indicates an X11 error (xcb_get_setup: returned null pointer) trying to launch the visual meters you requested (--meter-all).

What is your DISPLAY environment variable? Can xlogo successfully pop up a window?

[miqianmimi]

DISPLAY=localhost:10.0 and xlogo can not pop up a window.

Error: Can't open display: localhost:10.0

so how can i fix it ??

[keithw]

If you want the live animated meter, you'll have to get X working. The problem seems to be unrelated to mahimahi. localhost:10.0 suggests you logged in with ssh -X or something and are trying to forward X over the connection, which you also probably don't want to do (because the animation would consume a lot of throughput). You'll have the best results if you use the computer normally (on a graphical consume/monitor) instead of over an SSH connection.

Or you can just run mm-link without the --meter-all option and then you won't get the animation and it won't try to use a graphical display or X11 at all.

[miqianmimi]

thank you ! I know what happened.

[hexi519]

If you want the live animated meter, you'll have to get X working. The problem seems to be unrelated to mahimahi. localhost:10.0 suggests you logged in with ssh -X or something and are trying to forward X over the connection, which you also probably don't want to do (because the animation would consume a lot of throughput). You'll have the best results if you use the computer normally (on a graphical consume/monitor) instead of over an SSH connection.

Or you can just run mm-link without the --meter-all option and then you won't get the animation and it won't try to use a graphical display or X11 at all.

Hi~ Xlogo can pop up and DISPLAY is localhost:12.0, so what should I do to fix it up ？I work with it on a server over an SSH connection and is there any method to show the figure from the remote server?