Por que minha impressora não está listada ao usar o comando lsusb?
Tenho um HP Photosmart C4780 conectado via USB no Ubuntu 12.04. Eu instalei hplip mas ainda assim, mas isso não parece ter resolvido o problema. A impressora não aparece nas impressoras listadas.
Como posso adicionar a impressora?
Obrigado.
Editar - usando dmesg | cauda -f:
Antes de conectar a impressora
[15358.944014] usb 1-1.4: device descriptor read/all, error -71
[15359.015787] usb 1-1.4: new high-speed USB device number 12 using ehci_hcd
[15359.119684] usb 1-1.4: device descriptor read/all, error -71
[15359.191166] usb 1-1.4: new high-speed USB device number 13 using ehci_hcd
[15359.223171] usb 1-1.4: device descriptor read/8, error -71
[15359.354968] usb 1-1.4: device descriptor read/8, error -71
[15359.530444] usb 1-1.4: new high-speed USB device number 14 using ehci_hcd
[15359.562288] usb 1-1.4: device descriptor read/8, error -71
[15359.694434] usb 1-1.4: device descriptor read/8, error -71
[15359.797753] hub 1-1:1.0: unable to enumerate USB device on port 4
Depois de ligar:
[15498.352933] usb 1-1.4: device descriptor read/all, error -71
[15498.424509] usb 1-1.4: new high-speed USB device number 16 using ehci_hcd
[15498.528717] usb 1-1.4: device descriptor read/all, error -71
[15498.600251] usb 1-1.4: new high-speed USB device number 17 using ehci_hcd
[15498.632144] usb 1-1.4: device descriptor read/8, error -71
[15498.763804] usb 1-1.4: device descriptor read/8, error -71
[15498.939336] usb 1-1.4: new high-speed USB device number 18 using ehci_hcd
[15498.971263] usb 1-1.4: device descriptor read/8, error -71
[15499.103217] usb 1-1.4: device descriptor read/8, error -71
[15499.206663] hub 1-1:1.0: unable to enumerate USB device on port 4