Q: Hdmi adapter not working after upgrade to iOS8

Same situation here (HDMI cable from apple) on iPhone 4s, dont work anymore on my 4s IOS8, but still work on 4s IOS7 of my wife. I have no error, only black screen, I can hear de sound, but no image.

Same problem, iPad 3 with the official cable. I had to resort to using my phone which is still on 7. Hope this is fixed soon, it's very unfortunate.

Send feedback to Apple to make sure they know about the issue.  That seems a rather urgent one, and I know they are paying close attention to iOS8 bugs right now.

How do we send official feedback to Apple?

https://www.apple.com/feedback/

Done.
Merci.

I Have the same problem too. I have an ipad 2 updated to ios8 and the hdmi cable came up with the message"not supported with this device". My husband who has not udated can still use the cable with no issues.  The cable is not an apple product but has in the past worked fine.

I can wait a little before going back to 7, as soon as i know that it is working good with 8, il keep inform here.

I have iPad 2 it just happen to me right after I updated to IOS 8 but it has happen to me before in IOS 7. I have Sony TV to fix it I would shut the TV off unplug then plug the HDMI adapter back into the IPad then turn on the tv. It still has back screen then I would touch the screen for input then the picture is on . Sometimes I would have to do this couple times . I would go months without any problems then the message would show up then I would have to do the something over again. Do not know if it's the Sony TV or the IPad not communicating with each other. The HDMI adapter I have  is from Apple.

if you full screen the vide fist, then connect the hdmi, it will work. Still ***** that we have to do it though 

I have the same problem.

After I updated ipad 2 to ios8 and When I plugged the hdmi cable in to my Sony Bravi TV came up with the message "not supported with this device".

Cable still works fine with other IOS 7.2.1 devices

Please help.

iPad 3 and 3rd party adapter - worked OK prior to update now "accessory not supported".

Following hot on the heals of my 1 year old £1700 iMac developing a hardware fault - it's fair to say that Apple aren't my favourite company at the moment!

Dusted off my 4 year old £500 HP PC whilst it's repaired - not as pretty but at least it works.