I will accept a redirect to another list if this is the wrong one.<div><br></div><div>When I run a loop of "xset dpms force off; sleep 1; xset dpms force on; sleep 1" to repeatedly turn on and off the panel (connected through i915 LVDS), it does not come back on after a while. The backlight comes on, but the framebuffer is not displayed.</div>
<div><br></div><div>I probed the LVD_A_CLKM signal and saw that the "force on" would transition it from 0V to 1V, but I would not see the clock oscillation that I usually see.</div><div>I do not have a differential probe to see the pretty picture with both CLKM and CLKP, but I expect to see _something_. And this corresponds with my blank screen.</div>
<div><br></div><div>Has this been reported before?</div><div><br></div><div>I dumped a bunch of i915 registers, but I do not see a significant difference between "working" and "not working". Just some (undocumented, as far as I can tell) sequential counter at 0x61100 and a scanline counter at 0x71000.</div>
<div><br></div><div>bryan.</div>