<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO --- - After suspend/resume, screen is black for all but the highest levels with i915 driver on MacBook Air 6,2" href="https://bugs.freedesktop.org/show_bug.cgi?id=67454#c85">Comment # 85</a> on <a class="bz_bug_link bz_status_NEEDINFO " title="NEEDINFO --- - After suspend/resume, screen is black for all but the highest levels with i915 driver on MacBook Air 6,2" href="https://bugs.freedesktop.org/show_bug.cgi?id=67454">bug 67454</a> from <a class="email" href="mailto:sam.attwell@gmail.com" title="sam.attwell@gmail.com <sam.attwell@gmail.com>"> sam.attwell@gmail.com</a> <pre>(In reply to <a href="show_bug.cgi?id=67454#c81">comment #81</a>) > (In reply to <a href="show_bug.cgi?id=67454#c79">comment #79</a>) > > Thank you Patrick! Good work - your module works great on my Macbook Air > > 6.2 in EFI-Mode. (Kernel 3.13-rc3). I'd love to understand the actual > > problem, did you figure out, why the standard backlight mechanism in i915 > > doesn't work? > > I still don't understand what the actual problem is but the backlight driver > (LP8550) that my module is controlling doesn't change any of it's settings > after suspend. It takes a PWM signal on one of the input pins and that > signal must be getting screwed up. How that pin is wired might be harder to > figure out. > > What my module does is to ignore that input pin and instead write the > brightness value to an on-chip register and set it up so it becomes the > source for the LP8550. I access the LP8550 over SMBUS through ACPI methods. > It might be better to access the SMBUS directly but this was the fastest way > to get something working. > > If you find any bugs/issues with mba6x_bl please report it on github. Hi Patrick, Trying to make install from the git repository fails for me with: "Can't read private key DEPMOD 3.11.0-15-generic make[1]: Leaving directory `/usr/src/linux-headers-3.11.0-15-generic'" Anything obvious i'm doing wrong?</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are the assignee for the bug.</li> </ul> </body> </html>