Keyboard and mouse stoped being recognized

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lucosselin

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I've installed Ubuntu on an iMac late 2013 with success; used it for a while, then stoped for a few weeks.
When I try to start it again, it does not recognize the keyboard and the mice.
So, I've totally lost the use of the computer.
Any cue?
 


Check the batteries?
 
Possibly a dry joint, try unplugging and plugging back in a few times
 
I've succeeded to have other keyboard and mouse detected (it's my Apple k/m that were no more detected by Ubuntu), but Wi-fi and Bluetooth are not on any more.

How can I restart the iMac with the USB I've used to mount Ubuntu on my iMac? I don't know.
 
You have another thread (here) about your wifi and bluetooth. If it has broken again, you should follow up in that thread instead, and just leave this thread for the keyboard/mouse problem.

Reinstalling Ubuntu on your iMac may be your best choice to solve all of these problems, but I know nothing about Apple hardware and can't help much with that. It would probably be good to start a new thread to help you with the reinstall process as well.

Keep in mind that a brand new Ubuntu LTS (22.04) will be out in less than 2 weeks (release date 21st April). If you can be patient, you might want to wait and install that one.
 
Old Tom Bombadil said:
You have another thread (here) about your wifi and bluetooth. If it has broken again, you should follow up in that thread instead, and just leave this thread for the keyboard/mouse problem.

Reinstalling Ubuntu on your iMac may be your best choice to solve all of these problems, but I know nothing about Apple hardware and can't help much with that. It would probably be good to start a new thread to help you with the reinstall process as well.

Keep in mind that a brand new Ubuntu LTS (22.04) will be out in less than 2 weeks (release date 21st April). If you can be patient, you might want to wait and install that one.
Click to expand...
Thank you for the news on the new release; I'm in no hurry and I can wait for it.
But do you know how I can force my Ubuntu version to start from USB?
 
Booting on a Ubuntu USB is the same as you have done before to install it, except instead of "Install" you would choose to "Try Ubuntu". If you haven't already, you have to download the .iso file, and then it is required to properly write the .iso to the USB. You can't simply copy the .iso or it will not boot, so it is critical to properly write it to the USB. There are many instructions on this forum and other sites that describe this process.

With the USB properly prepared, you have to interrupt the boot process of your iMac to boot on the USB instead of the internal hard drive. I have no idea how this is done because I have never used Apple products. You should know how since you have installed Ubuntu before.
 
Old Tom Bombadil said:
Booting on a Ubuntu USB is the same as you have done before to install it, except instead of "Install" you would choose to "Try Ubuntu". If you haven't already, you have to download the .iso file, and then it is required to properly write the .iso to the USB. You can't simply copy the .iso or it will not boot, so it is critical to properly write it to the USB. There are many instructions on this forum and other sites that describe this process.

With the USB properly prepared, you have to interrupt the boot process of your iMac to boot on the USB instead of the internal hard drive. I have no idea how this is done because I have never used Apple products. You should know how since you have installed Ubuntu before.
Click to expand...
Merci.
I'll go through that process again.
(ツ)
 
did the kernel get upgraded from the original install? you could try an older kernel, when kernels get upgraded sometimes older drivers are deprecated so your older hardware no longer works with new kernels
 
lucosselin said:
Merci.
I'll go through that process again.
(ツ)
Click to expand...
Lord Boltar said:
did the kernel get upgraded from the original install? you could try an older kernel, when kernels get upgraded sometimes older drivers are deprecated so your older hardware no longer works with new kernels
Click to expand...
When I restarted the computer, a few weeks after the original installation of Ubuntu, there was a message that an automatic upgrading had been done, indeed. And Apple's keyboard/mouse where not functioning anymore; k & m used for Windows did function, but wi-fi and bluetooth were dead... I suppose all that confirm your analysis.

I still have the USB for the original installation; could it be used to get back to the old kernel? or should I go directly to the next update?

Any cue?
(And merci for your help.)
 
Last edited:
Your old kernel still might be installed - in the terminal run
Code: 
find /boot/vmli*
this will list all kernels installed on your system - if you have the older kernel still installed - Holding down the shift key while booting, will display the Grub menu. You can then select an older kernel version to boot and see if your hardware starts working again
 
lucosselin said:
How can I restart the iMac with the USB I've used to mount Ubuntu on my iMac? I don't know.
Click to expand...
On Mac to bring up a one-time boot menu - turn on your computer and hold down the Option/alt key. After a short delay you'll see a list of available drives, including both internal and external ones. Select your thumb drive
 
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