USB devices not detected on startup

[AlSab]

Hello,

I have installed the latest version of Ubuntu and the updates.
I have the following problem. When linux is loaded after reboot or power on, it does not detect all usb devices. I have keyboard, bar-code reader and mouse on the USB. I need to plug them in and out after Ununtu has started, in order to be detected. I have replaced the usb mouse with ps2. Now the mouse is OK, but the problem remains for the bar-code reader. Keyboard seems that is always deteced.

Thanks,
Alex

[Scottydogg]

I have the same problem. If I unplug my USB devices and plug them in again, they are detected.