Kevin, I can't reproduce this issue on an older dell latitude laptop. When pressing the brightness hardware keys (actually Fn + up/down arrow) the brightness slider moves accordingly, and then moving the slider correctly changes the brightness.
Note that I am running zesty with a locally fixed systemd package (see bug 1661568). I wonder if what you are seeing is a side-effect of the aforementioned systemd issue.
My proposal is to try again in a few days, when the fixed systemd package will have landed to zesty (hopefully). If the problem persists we can investigate further.
Kevin, I can't reproduce this issue on an older dell latitude laptop. When pressing the brightness hardware keys (actually Fn + up/down arrow) the brightness slider moves accordingly, and then moving the slider correctly changes the brightness.
Note that I am running zesty with a locally fixed systemd package (see bug 1661568). I wonder if what you are seeing is a side-effect of the aforementioned systemd issue.
My proposal is to try again in a few days, when the fixed systemd package will have landed to zesty (hopefully). If the problem persists we can investigate further.