Hi Adam, thanks for your reply, On Wed, Dec 7, 2016 at 2:17 AM, Adam Jackson <[email protected]> wrote: > On Thu, 2016-11-17 at 14:18 +0800, Yu Chen wrote: > >> May I know why Xorg takes 200ms+ before acking with VT_RELDISP? > > Because it's been asked to set the hardware back to text mode, which > requires reprogramming the GPU, which takes time. > > 200ms is more time than it probably _should_ take, but you haven't > specified (either in this email or in the bug you link to) what GPU > this is and which driver you're using, so I can't be any more specific > about what exactly is taking so much time and how it can be avoided > without that. The GPU is： 00:02.0 VGA compatible controller: Intel Corporation Broadwell-U Integrated Graphics (rev 09) (prog-if 00 [VGA controller]) Subsystem: Apple Inc. Broadwell-U Integrated Graphics driver in use: i915 Xorg version: X.Org X Server 1.18.3 Release Date: 2016-04-04
thanks, Yu _______________________________________________ [email protected]: X.Org development Archives: http://lists.x.org/archives/xorg-devel Info: https://lists.x.org/mailman/listinfo/xorg-devel
