Recently I installed Ubuntu 12.04 on my Dell 1554 laptop.

I was adjusting my screen brightness when this happened :


this has become a recurring problem which is really annoying.

I also want to tell you that :

  1. I have installed the graphics drivers ATI/AMD FGLRX graphics driver.
  2. I have got my graphics driver checked by Dell.

Can anybody tell me a solution to this and moreover is anybody out there who is having the same problem?

Thanks in advance.

H/W and S/w details:

Dell Studio 1554 Processor : Intel® Core™ i5 CPU M 430 @ 2.27GHz × 4
Memory : 4 GB
VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Manhattan [Mobility Radeon HD 5400 Series]

OS : Ubuntu Release 12.04 (precise) 64-bit
Kernel: Linux 3.2.0-34-generic

  • Well, your video card somehow switched to console mode. If it doesn't happen in Windows, it's certainly a driver bug (or an Ubuntu bug -- try updating to 14.04 or at least a kernel in the 3.5.0 series). Also this might be due to the "age" of the video card -- how old is it? (if the problem also appears in Windows). Try not tweaking the brightness though from the driver; use the physical controls on your display (if there are any) -- I am unable to use software controls since I upgraded to the last version of Windows... – Paul Stelian Sep 23 '14 at 11:35
  • This has some connection to new amd drivers. I had similar problem with radeon 5470. I sold the laptop before I had time to solve it. – Iľja Nov 11 '14 at 13:23
  • 2
    Is your system having an Intel graphics card as well(Hybrid)? – saji89 Dec 6 '14 at 3:35
  • Updating to 14.04 is not a good solution. But installing linux-image-generic-lts-trusty and xserver-xorg-lts-trusty packages on 12.04 may help. – N0rbert Dec 9 '14 at 10:10

I'm not sure how you're adjusting the brightness, but using xrandr, may yield different results.

As in xrandr --output VGA-0 --brightness 1.1 or 0.8 for darker, etc (see xrandr's output for your output name, maybe HDMI-0 or so)

[Q showed up in "Unanswered Questions", may help someone with a different brightness option. Probably will never get a reply from @Maverick Snyder though, last seen in 2013]

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