註：以上圖片上傳到紅聯Linux系統教程頻道中。
有網友問：我現在使用的是Ubuntu 14.10，是該重新安裝還是升級到Ubuntu 15.04？哪種方式更好？
建議：如果可以的話，請重新安裝Ubuntu 15.04，這樣更穩當。
PS：有網友從Ubuntu 14.10升級15.04，結果開機時顯示：
[16.546341] usb 4-1.1: device descriptor read/64, error -110
[31.739298] usb 4-1.1: device descriptor read/64, error -110
[31.915499] usb 4-1.1: new high-speed USB device number 4 using ehci-pci
[47.004127] usb 4-1.1: device descriptor read/64, error -110
[62.196866] usb 4-1.1: device descriptor read/64, error -110
[62.372935] usb 4-1.1: new high-speed USB device number 5 using ehci-pci
[72.792293] usb 4-1.1: device not accepting address 5, error -110
[72.864491] usb 4-1.1: new high-speed USB device number 6 using ehci-pci
[83.283856] usb 4-1.1: device not accepting address 6, error -110
[83.284106] usb 4-1-port1: unable to enumerate USB device
雖然最後能正常啟動。