On 2021-09-16 08:27, Christian König wrote: > Good morning, > > for the background I advised to contact you Michel since we couldn't find an explanation. > > Alex explanation might be correct, but the CS seems to come from the X server and is always roughly 60 seconds after going into power save. > > Any idea what that could be? For the DRM_IOCTL_MODE_* ioctls, attaching gdb to Xorg and setting a breakpoint on drmIoctl should show where they're coming from. The AMDGPU_CS ioctls are probably from glamor calling OpenGL, most likely for X11 drawing protocol requests. Note that in this case drmIoctl/ioctl will likely be called from a separate thread. Pierre / Marek should be able to help you find out where the OpenGL calls are coming from. In general, Xorg only ever does anything in response to: * X11 protocol requests, i.e. on behalf of clients. * Input events, i.e. on behalf of the user. * Other kernel events, e.g. hotplug events. FWIW, with only xfwm4 & xterm running on Xorg, I'm not seeing any drmIoctl calls during DPMS off. So the ioctls you're seeing are most likely triggered by clients. -- Earthling Michel Dänzer | https://redhat.com Libre software enthusiast | Mesa and X developer
