<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [BYT][VLV] No picture on DSI display after DRM loads on Teclast X80H tablet" href="https://bugs.freedesktop.org/show_bug.cgi?id=96996#c18">Comment # 18</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [BYT][VLV] No picture on DSI display after DRM loads on Teclast X80H tablet" href="https://bugs.freedesktop.org/show_bug.cgi?id=96996">bug 96996</a> from <a class="email" href="mailto:mail@schorn-stephan.de" title="Stephan Schorn <mail@schorn-stephan.de>"> Stephan Schorn</a> <pre>Created <a href="attachment.cgi?id=129075" name="attach_129075" title="dmesg of 4.10.0-rc3 drm-tip with i915.fastboot=1 (forced to work by dirty patch), DSI screen works">attachment 129075</a> <a href="attachment.cgi?id=129075&action=edit" title="dmesg of 4.10.0-rc3 drm-tip with i915.fastboot=1 (forced to work by dirty patch), DSI screen works">[details]</a> dmesg of 4.10.0-rc3 drm-tip with i915.fastboot=1 (forced to work by dirty patch), DSI screen works I got it working! At least with a very dirty patch: In intel_display.c, I changed the line FROM if (i915.fastboot && intel_pipe_config_compare(dev, to_intel_crtc_state(crtc->state), pipe_config, true)) { TO if (i915.fastboot) { That way, fastboot can be enabled by kernel parameter i915.fastboot=1 again. Although, if you only add this kernel parameter, the system won't boot, it will hang. I don't know why. You have to remove quiet and splash (or only one of them, I don't know). Then, the system will boot absolutely normal. Acceleration works, rotating the screen works etc. The other problems like the real time clock bug and system freezes persist, but you'll get a working system - for a few minutes. I don't have time to further investigate this stuff this evening, but I hope you'll be happy to know that the screen can be made working! You'll find the dmesg of my successful boot as attachment.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> </ul> </body> </html>