<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - [GLK DSI] Display not working with i915 driver" href="https://bugs.freedesktop.org/show_bug.cgi?id=109267#c62">Comment # 62</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO - [GLK DSI] Display not working with i915 driver" href="https://bugs.freedesktop.org/show_bug.cgi?id=109267">bug 109267</a> from <a class="email" href="mailto:markwynngarcia@outlook.com" title="Mark Wynn Garcia <markwynngarcia@outlook.com>"> Mark Wynn Garcia</a> <pre>Created <a href="attachment.cgi?id=144151" name="attach_144151" title="dmesg-max-cdclk">attachment 144151</a> <a href="attachment.cgi?id=144151&action=edit" title="dmesg-max-cdclk">[details]</a> dmesg-max-cdclk So I tried something, which is to modify the patch and max the cdclk to 316800. It actually completely removed all flicker/modesetting that happens when starting X11. It also reduced flickering to just once instance in between grub and boot. Right now I really want to know what will happen if we can remove that modeset on boot, that maybe at least we will preserve working states even if there is still a bug in i915's initialization routines for GLK. In the attached dmesg, I think these are what's triggering the modeset: [ 4.941737] [drm:pipe_config_err [i915]] mismatch in base.adjusted_mode.crtc_vtotal (expected 1334, found 1335) [ 4.941786] [drm:pipe_config_err [i915]] mismatch in base.adjusted_mode.crtc_vblank_end (expected 1334, found 1335) [ 4.941834] [drm:pipe_config_err [i915]] mismatch in dsi_pll.ctrl (expected 0x00000132, found 0x00000532) I'll try hacking around this one, and if you any ideas, if you think this is a good direction to pursue, please let me know.</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 QA Contact for the bug.</li> <li>You are the assignee for the bug.</li> </ul> </body> </html>