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The following commit from about a year ago removed nouveau_dp_dpms() which did steps required to suspend and resume a monitor connected via DisplayPort. commit 0a0afd282fd715dd63d64b243299a64da14f8e8d Author: Ben Skeggs <bskeggs at redhat.com> Date: Mon Feb 18 23:17:53 2013 -0500 drm/nv50-/disp: move DP link training to core and train fro...

On 5 May 2014 01:43, Ben Skeggs <skeggsb at gmail.com> wrote: > On Mon, May 5, 2014 at 4:48 AM, Sergei Antonov <saproj at gmail.com> wrote: >> The following commit from about a year ago removed nouveau_dp_dpms() which >> did steps required to suspend and resume a monitor connected via DisplayPort. >> >> commit 0a0afd282fd715dd63d64b243299a64da14f8e8d >> Author: Ben Skeggs <bskeggs at redhat.com> >> Date: Mon Feb 18 23:17:53 2013 -0500 >> drm/nv...

On Mon, May 5, 2014 at 4:48 AM, Sergei Antonov <saproj at gmail.com> wrote: > The following commit from about a year ago removed nouveau_dp_dpms() which > did steps required to suspend and resume a monitor connected via DisplayPort. > > commit 0a0afd282fd715dd63d64b243299a64da14f8e8d > Author: Ben Skeggs <bskeggs at redhat.com> > Date: Mon Feb 18 23:17:53 2013 -0500 > drm/nv50-/disp: move DP link t...

...org Created attachment 96206 --> https://bugs.freedesktop.org/attachment.cgi?id=96206&action=edit RFC patch on top of 34d59508 (drm/nouveau: fix TTM_PL_TT memtype on pre-nv50) Commit 0a0afd28 (drm/nv50-/disp: move DP link training to core and train from supervisor) removed a call to 'nouveau_dp_dpms' at the bottom of nv50_display.c. Without this call, 'xset dpms force {on,off}' does not have any effect on my DP-attached monitor. The attached proof-of-concept patch re-adds the call, as well as a partial version of nouveau_dp_dpms which causes 'force off' to work again. I...