Tried to install ubuntu 12.10 on that machine but failed. The kernel in the installation iso is 3.5.0-17, there is no i915-hsw module.
So I tried to do a fresh installation of 12.04.2. The xorg stack is lts-quantal. Without 2:2.20.9-0ubuntu2.3~precise1 in precise-proposed, this issue can be reproduced. After installing this package, this issue is fixed.
Tried to install ubuntu 12.10 on that machine but failed. The kernel in the installation iso is 3.5.0-17, there is no i915-hsw module.
So I tried to do a fresh installation of 12.04.2. The xorg stack is lts-quantal. Without 2:2.20. 9-0ubuntu2. 3~precise1 in precise-proposed, this issue can be reproduced. After installing this package, this issue is fixed.