<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - LVDS blank screen on GM45" href="https://bugs.freedesktop.org/show_bug.cgi?id=94825#c26">Comment # 26</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - LVDS blank screen on GM45" href="https://bugs.freedesktop.org/show_bug.cgi?id=94825">bug 94825</a> from <a class="email" href="mailto:ville.syrjala@linux.intel.com" title="Ville Syrjala <ville.syrjala@linux.intel.com>"> Ville Syrjala</a> <pre>(In reply to Rob Kramer from <a href="show_bug.cgi?id=94825#c25">comment #25</a>) > Ah, I just noticed there is still this issue: > > [drm:intel_enable_lvds [i915]] *ERROR* timed out waiting for panel to > power on > > This occurs every time I restart X, which perhaps does a mode switch to the > same mode? The panel seems to work fine though.. > > When there is a mode switch (or X is started), a relay clicks in this > display setup. I'm not sure why or what that's for, or if that could > introduce an external delay that the driver doesn't expect. > > if (wait_for((I915_READ(stat_reg) & PP_ON) != 0, 1000)) > DRM_ERROR("timed out waiting for panel to power on\n"); > > Is there a way to see if the panel is detected as switched on after a longer > period of time (some seconds)? In /sys, debugfs, or with intel-gpu-tools? Please open a new bug for that, and attach the dmesg, opregion, and 'intel_reg dump' there. Make sure you grab intel-gpu-tools fresh from git since we had a bug there which make 'intel_reg dump' fail on gen4. I pushed the fix for that a few days ago.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are on the CC list for the bug.</li> <li>You are the assignee for the bug.</li> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>