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Description of problem: System Settings -> Color panel doesn't list my monitor information, saying "no devices supporting color management detected" Version-Release number of selected component (if applicable): gnome-settings-daemon-3.2.1-4.fc16.x86_64 How reproducible: every time - with both the nvidia and nouveau drivers Steps to Reproduce: 1.System Settings 2.Color 3."no devices..." Additional info: .xsession-errors file shows the following: (gnome-settings-daemon:1858): color-plugin-WARNING **: failed to get edid: unable to get EDID for output My monitor is DELL U2410, and the color management worked perfectly in F15. The Xorg.0.log is full of EDID data received by the drivers. May be it's a kind of permission issue: [root@home ~]# monitor-get-edid mmap /dev/mem: Permission denied [root@home ~]# ll -Z /dev/mem crw-r-----. root kmem system_u:object_r:memory_device_t:s0 /dev/mem
Accidently hit on this bugreport while debugging an unrelated kernel crash on modprobe nouveau modeset=1 The permission issue in this case can be solved like this: [root@linux ~]# ll -Z /dev/mem crw-r-----. root kmem system_u:object_r:memory_device_t:s0 /dev/mem [root@linux ~]# monitor-edid --v probing EDID using VBE (port 0) mmap /dev/mem: Permission denied VBE: could not initialize LRMI VBE info call failed, skipping all ports [root@linux ~]# tail -5 /var/log/messages | grep setroubleshoot Nov 25 08:26:03 linux setroubleshoot: SELinux is preventing /usr/bin/dosemu.bin from mmap_zero access on the memprotect Unknown. For complete SELinux messages. run sealert -l 42ab0559-1bc8-4b52-99b2-b42d4a846516 sealert -l 42ab0559-1bc8-4b52-99b2-b42d4a846516 .. SELinux is preventing /usr/bin/dosemu.bin from mmap_zero access on the memprotect Unknown. .. If you want to control the ability to mmap a low area of the address space, as configured by /proc/sys/kernel/mmap_min_addr. Then you must tell SELinux about this by enabling the 'mmap_low_allowed' boolean. Do setsebool -P mmap_low_allowed 1 [root@linux ~]# setsebool -P mmap_low_allowed 1 and now monitor-edid works You should probably revert the boolean after finishing your testing as the mmap low memory in the kernel is a security risk. [root@linux ~]# setsebool -P mmap_low_allowed 0 Good luck with solving your original problem. For me personally ever since enabling SELinux half of the time something doesn't work as expected there is an SELinux warning in the log.
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Fedora 16 changed to end-of-life (EOL) status on 2013-02-12. Fedora 16 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.