Description of problem: Powering down the dedicated NVIDIA graphics chip results in a x11 kernel panic when switching power states. See bug 896400. Version-Release number of selected component (if applicable): xorg-x11-drv-nouveau-1.0.6-1.fc18.x86_64 How reproducible: Disable (power down) the unused dedicated nvidia graphics chip and reboot / power down / suspend etc. the computer. Steps to Reproduce: 1. Boot the computer with switchable graphics enabled in BIOS 2. Check the running on IGD adapter, both apdapters powered (hitting bug 896400) # cat /sys/kernel/debug/vgaswitcheroo/switch 0:IDG:+:Pwr:000xxxxxx 1:DIS: :Pwr:000xxxxxx 3. Powerdown the DIS adapter: # echo OFF> /sys/kernel/debug/vgaswitcheroo/switch 4. Confirm the swiched off GPU: # cat /sys/kernel/debug/vgaswitcheroo/switch 0:IDG:+:Pwr:000xxxxxx 1:DIS: :Off:000xxxxxx 5. Optional, confirm this with powertop (my notebook actually consumes 5-6W less per h) 6. # reboot - Panic - Actual results: kernel panic Expected results: Workaround: I have tested two workarounds: 1. Disable NVIDIA GPU in BIOS - or - 2. Powerdown the GPU while X11 not runnung: # systemctl start multi-user.target # echo OFF> /sys/kernel/debug/vgaswitcheroo/switch [ 71.046869] VGA switcheroo: switched nouveau off [ 71.048137] nouveau E[ PFIFO][0000:01:00.0] write fault at 0x0000000000 [PAGE_NOT_PRESENT] from PCOPY0/PCOPY0 on channel 0x003fe1b000 [ 73.045525] nouveau E[ PFIFO][0000:01:00.0] channel 0 kick timeout [ 73.045575] nouveau E[ PFIFO][0000:01:00.0][0xc000906f][ffff88021c9bed80] failed to detach PCE0 context, -16 [ 73.045642] nouveau E[ PCE0][0000:01:00.0][0x0300c01b][ffff88021c64c600] failed suspend, -16 [ 73.045747] nouveau E[ DRM] 0xcccc0000:0x000490b5 suspend failed with -16 [ 73.045804] nouveau E[ DRM] 0xdddddddd:0xcccc0000 suspend failed with -16 [ 73.045919] nouveau E[ DRM] 0xffffffff:0xdddddddd suspend failed with -16 [ 73.046010] nouveau E[ DRM] 0xffffffff:0xffffffff suspend failed with -16 # systemctl start graphical.target This can be done by systemd before Additional info: Requires a notebook with switchable graphics. Tested with Lenovo Thinkpad E330; NVIDIA GT + Intel i915.
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Fedora 18 changed to end-of-life (EOL) status on 2014-01-14. Fedora 18 is no longer maintained, which means that it will not receive any further security or bug fix updates.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. If you are unable to reopen this bug, please file a new report against the current release. If you experience problems, please add a comment to this bug. Thank you for reporting this bug and we are sorry it could not be fixed.