Description of problem: I have a brand new lenovo T530 laptop. I installed F17 from DVD in late December. Somewhere in late January, after applying updates, my brightness/backlight controls stopped functioning properly. I used to be able to press Fn+F8 'sunshine-' and Fn+F9 'sunshine+' to adjust the brightness of the built in display to any or all of the available levels. After updating, when I use the fn+f8,f9 keys, I am only able to adjust the brightness down one notch/step. Version-Release number of selected component (if applicable): Up-to-date Fedora 17 How reproducible: every time. Steps to Reproduce: 1. Log in to an up-to-date freshly booted F17 system 2. Depress Fn+F8 to reduce brightness, repeat Actual results: Crippled backlight key functionality - brightness decreases one step only. Adjustments must be made through the system settings applet. :^( Expected results: The Fn+{F8,F9} backlight adjustment keys should work without issue. Additional info: These keys worked before on the initial install from DVD and yum -y update broke them... The keys work fine in Windows 8 & OpenBSD...
I don't know if this is related - but when I use "shutdown -h now", more often than not the system reboots :^( I ran updates yesterday evening - both problems still exist. Linux bieszczady 3.7.9-101.fc17.x86_64 #1 SMP Mon Feb 18 22:04:06 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
After fresh F18 install, I wasn't able to adjust brightness at all. Appending "acpi_backlight=vendor" to kernel command-line (temporarily) fixed the issue for me.
As the reported behavior is slightly different than what I observed in F18, there is a separate [bug 947976] for that.
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Fedora 17 changed to end-of-life (EOL) status on 2013-07-30. Fedora 17 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. Thank you for reporting this bug and we are sorry it could not be fixed.