In have just updated to 15.04 and found that I can't do anything since all my input devices don't work. I think it is a power issue since the LED on my mouse flickers. I have tryed the older kernel and everything works again. Anyone know how to solve this and what is causing it.
Kernel numbers please and mouse/keyboard make would help figuring it out
A complete power off and restart might reinitialise your input devices.
Tried repluging it while the PC is on?
I have tried plugging it all back in and restarting but still no LEDs on keyboard or input signal. It currently works on the 3.16.0.33 kernel and doesn't on the 3.19.0.21 kernel.
what is usbcore.autosuspend set to?
As per this link: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1452830
might be what you are experimenting try to update and upgrade again.
I have no idea where to find the usbcore.autosuspend setting and I will try to fresh install.
it won't work if that the issue is usbcore.autosuspend because Ubuntu has it enabled by default. So if you have a poorly made USB keyboard or the USB power management issue within the USB device ."The USB specification states that all USB devices must support power management. Nevertheless, the sad fact is that many devices do not support it very well. You can suspend them all right, but when you try to resume them they disconnect themselves from the USB bus or they stop working entirely. This seems to be especially prevalent among printers and scanners, but plenty of other types of device have the same deficiency." it been a know issue for years with USB devices so much so that it is noted in the kernel documentation. I recommend trying to login under single user mode as root and disabling it. With Ubuntu usbcore compiled into the kernel so you need to change the kernel boot parameters. how to do it can be found here.(second answer) If that doesn't work i will suggest something else.
I physically can't log in on the latest kernel since there is no input for mouse or keyboard just monitor output. My mouse and keyboard are the razer wired ones so I guess they do support USB power management.
Do the usb peripherals work in BIOS and GRUB? because single user mode is also know as recovery mode. So try what is described here and see if that gets you in. If they are not work in BIOS or GRUB then it a different issue all together. Also i can tell you that Razer while you may spend more money for them they don't always work as you expect, since all that extra stuff they add to it, means that it might be expecting different message from the kernel and when the kernel see the driver not acting as expect the kernel tends to kill the driver causing your peripherals to stop working. Also razor products don't always light up if you don't have their custom driver. Ubuntu doesn't give the option to turn on ssh during the installer or turns it on by default? I am assuming that they worked during install if so getting a liveCD and mounting the drive will also allow you to change the kernel boot options. Just trying to give you option you could always try a different distro that compiles the kernel differently or compile it yourself( i honestly don't know your skill level).
Is linux-image-extra installed for the new kernel?
dpkg -l | awk '/linux-image-[3.19,e]/&&/21/ {print $2}'Sorry it has taken me so long to get back to you, but I have tried the single user mode and I still have no input. I can however boot into the 3.16.0.33 Linux version and keyboard and mouse work fine in BIOS and GRUB.