<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [LPT SPT KBP] Acer V3-772G screen brightness cannot be adjusted with i915.fastboot enabled" href="https://bugs.freedesktop.org/show_bug.cgi?id=108225#c29">Comment # 29</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [LPT SPT KBP] Acer V3-772G screen brightness cannot be adjusted with i915.fastboot enabled" href="https://bugs.freedesktop.org/show_bug.cgi?id=108225">bug 108225</a> from <a class="email" href="mailto:jwrdegoede@fedoraproject.org" title="Hans de Goede <jwrdegoede@fedoraproject.org>"> Hans de Goede</a> <pre>About the short flicker, I've been tracking down a regression in 4.20 (and thus also drm-next) which causes the screen to briefly go purple with DSI panels. Can you try: git revert 516a49cc19467e298d08a404f73a6e311f4548d1 That fixes the purple flash for me (I need to write a proper commit message and then submit this revert upstream for 4.20). While debugging the purple flash I found another possible suspect commit, so if that revert does not help, you can also try: git revert 9b27390139dbe0dc10d1899545248862fe826b61 For me that commit makes the initial hw-state readout think none of the pipes have any active planes (but strangely enough I see no negative effects from this). And for good measure if neither revert helps, try combining both.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> </ul> </body> </html>