Messages in this thread | | | Date | Wed, 20 Jun 2012 17:48:42 +0200 | From | Dominik Brodowski <> | Subject | Thunderbolt, Apple Monitor & MBA, and excess kworker load |
| |
Hi,
At work, I wish to attach a 27" Apple Display using thunderbolt to my Mac Book Air 4,2 13". Using OS X, it works fine, but as I prefer using Linux, I tested out Ubuntu's stock kernel and (among other) 3.5.0-rc3+ as of f40759e. Hotplug doesn't work (known issue), but also with coldplug the display reacts _very_ slow, way too slow for real use: The screen updates only every half second or so. Is this a known bug? Might something go afoul with kworker -- they need about 75% of the CPU with the large display attached, and less than 1% _without_ the large display.
Any hints are most welcome, also on where I may dig further to determine the root causes...
Thanks & best,
Dominik
| |