Harris composed on 2016-09-17 08:57 (UTC): > I just got a new Dell laptop to replace my former one that I ran Debian on > with no issues -- unfortunately with this one, the screen flickers when I > have it at essentially the next-to-highest brightness setting. I say > "essentially" because it happens in GNOME at the second-highest brightness > level (using the keyboard up/down buttons) although in other desktops (e.g., > Xfce) I cannot reproduce the problem using these keys, because Xfce does not > have such fine increments when I use the keys -- the increments are larger. > However, I CAN reproduce the problem in Xfce (as well as in LXDE and MATE) if > I (a) reproduce the problem in GNOME using the keys, then (b) log out and log > into one of these other DE's without touching the brightness keys.
> It appears that this is not a problem with the hardware, as I did a test of > reinstalling Windows 10 (which is what shipped with this laptop) and the > problem did not appear. However, now that I've learned that the brightness > keys produce different brightness percentages depending on the specific > desktop environment, I can't be sure that this does not happen in Windows. > Anyway, does anyone have any knowledge of this type of problem, and advice on > some potential solutions? > Here are my system specs: > Dell Inspiron 15 3000 Series > Intel Core i3-5005U Processor (3M Cache, 2.00 GHz) > 4GB, 1600MHz, DDR3L memory > Intel HD Graphics 5500 > 15.6-inch HD (1366 x 768) Truelife LED-Backlit Display > - In GNOME Settings, the graphics is indicated as Gallium 0.4 on llvmpipe > (LLVM 3.5, 256 bits) > I'm running Jessie 8.5. > Thanks very much in advance! Give a driver switch a try: # apt-get purge xserver-xorg-video-intel # apt-get install xserver-xorg-video-modesetting restart Xserver. Next time, include output from 'lspci -v'. Forgot to mention originally why: http://www.phoronix.com/scan.php?page=news_item&px=Ubuntu-Debian-Abandon-Intel-DDX -- "The wise are known for their understanding, and pleasant words are persuasive." Proverbs 16:21 (New Living Translation) Team OS/2 ** Reg. Linux User #211409 ** a11y rocks! Felix Miata *** http://fm.no-ip.com/
