Arduino yun v1.1.6

Hello my friends, i have a probleme with arduino yun v1.1.6

The board work with ssh, mount unmount key usb, transfert with wifi ok but d ont work single card (only yun power 5vdc)

The yun with uno r3 transfert ok but the programme d ont work or working very slow...

And just uno r3 not a probleme. ...

Do you have a solutions ?

Thank you very much.