On 1 March 2015 at 22:15, Julien Cristau <jcristau@debian.org> wrote: > On Sun, Mar 1, 2015 at 22:03:38 +0000, Luca Boccassi wrote: > >> Dear Maintainer(s), >> >> I am attaching a Git patch that backports the fixes needed in order to >> solve the backlight problem. I have tested this on a Dell Latitude >> E5540 (Intel Haswell i7-4600U with GPU HD Graphics 4400) running >> Debian Jessie. I hope this can be useful. >> > This is way too big a change to ship in jessie. Seems like the > backlight helper is mostly useful when X doesn't run as root, which is > irrelevant here, so we could do without the code movement. Do you know > what exact change does fix your backlight issue? Hello Julien, Unfortunately I do not know. As you can see from the log, it's just those 5 commits, and most of the changes are in one single commit (rest is dependencies), so it is not possible to use bisect to restrict the changeset to the fix for the black screen. The tools/backlight.c helper itself looks rather small, with the bulk of the changes in the code that goes in the Xorg intel_drv.so itself. I am not familiar with that code, so I'm afraid I cannot see which chunks could be relevant for the fix and which are not. Kind regards, Luca Boccassi
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