CO/UA IFE
There has yet to be a CO/UA 777 long haul flight I have been on where there weren't IFE issues.
The system usually has to be rebooted 3-4 times before the issue is fixed, and in that case it doesn't always fix the issue.
My last flight was last month EWR-BOM, and my IFE was working just fine, but others weren't. The solution? Reboot the entire damn plane multiple times. Took me a good 3 hours to watch a 2 hour movie.
Share your pain man, I really wish they would have done some more intensive stress testing on the IFE before deployment.