<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - [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#c42">Comment # 42</a> on <a class="bz_bug_link bz_status_ASSIGNED " title="ASSIGNED - [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:cevelnet@gmail.com" title="Tolga Cakir <cevelnet@gmail.com>"> Tolga Cakir</a> <pre>I checked out at d6a09cee2458adeed5c07882c7e0b91f089515b8 and applied both your patches from Nov 29th. Fresh boot and S3 resume work the same as before, but S4 resume is still bugged. I get a dark screen. After the kernel takes over, the backlight gets turned off and the display seems to be blank. I have used my smartphone's LED light and I couldn't spot any sort of display content. I had blind console access though. So I created a script for backlight setting, but echoing to /sys/class/backlight/intel_backlight/brightness in that situation didn't bring the backlight up (it works on S3 / normal boot). So, backlight controls still don't work after S4 resume. I want to note, that my laptop seems to do some sort of "modeset", before it puts itself into hibernate. When I initiate hibernate, the screen turns off, shortly turns on again (shows screen contents, backlight on, a bit brighter) and turns off again + whole device shuts down (S4). Maybe your new code saves / points to the wrong values because of this? Haven't found anything in the logs. Since I have blind console access, I can prepare scripts for blindly debugging. Any instructions / ideas?</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>