Bug 804359

Summary: kernel pci_root PNP0A08:00: ignoring host bridge window (conflicts with Video ROM [mem 0x000c0000-0x000cebff])
Product: [Fedora] Fedora Reporter: collura
Component: kernelAssignee: Kernel Maintainer List <kernel-maint>
Status: CLOSED NOTABUG QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: unspecified    
Version: 17CC: collura, gansalmon, itamar, jforbes, jonathan, kernel-maint, madhu.chinakonda, midgoon
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
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Clone Of: Environment:
Last Closed: 2013-04-02 18:46:07 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description Flags
part of /var/log/messages file with video rom memory error none

Description collura 2012-03-18 08:20:51 UTC 
Created attachment 570868 [details]
part of /var/log/messages file with video rom memory error

Description of problem:

  from var log messages:

  pci_root PNP0A08:00: ignoring host bridge window [mem 0x000cc000-0x000cffff] (conflicts with Video ROM [mem 0x000c0000-0x000cebff])


Version-Release number of selected component (if applicable):

  kernel-3.3.0-0.rc6.git0.2.fc17.x86_64

How reproducible:

   always

Steps to Reproduce:
1. boot
2. read message log
3.
  
Actual results:

   error message

Expected results:

   no error message

Additional info:
   would like error related to the disappearing brightness slider that happens with kernels > 3.1.9-1.fc16.x86_64 (https://bugzilla.redhat.com/show_bug.cgi?id=784532) but seem to remember the error with kernel-3.1.9-1.fc16.x86_64 as well

  http://www.smolts.org/client/show/pub_d71dc9ab-d675-4ee2-a9a9-303efc25df83
Comment 1 collura 2012-06-03 10:15:32 UTC 
still there with:

  kernel-3.3.7-1.fc17.x86_64
  xorg-x11-drv-ati-6.14.4-6.20120602git930760942.fc17.x86_64
Comment 2 Justin M. Forbes 2012-09-11 15:36:49 UTC 
Is this still happening with 3.5.3 kernels?
Comment 3 collura 2012-09-13 08:20:28 UTC 
yes it lives.

still there as of 

  kernel-3.5.3-1.fc17.x86_64
  xorg-x11-drv-ati-6.14.4-6.20120602git930760942.fc17.x86_64

"kernel: [    0.506392] pci_root PNP0A08:00: ignoring host bridge window [mem 0x000cc000-0x000cffff] (conflicts with Video ROM [mem 0x000c0000-0x000cebff])"
Comment 4 collura 2012-10-12 20:58:42 UTC 
still there as of

   kernel-3.6.1-1.fc17.x86_64
   xorg-x11-drv-ati-6.14.4-6.20120602git930760942.fc17.x86_64

var log messages:
"kernel: [    0.507828] pci_root PNP0A08:00: ignoring host bridge window [mem 0x000cc000-0x000cffff] (conflicts with Video ROM [mem 0x000c0000-0x000cebff])"
Comment 5 Álvaro Castillo 2013-01-12 09:05:59 UTC 
Add another devices info:

HP-G6 2145SS laptop.
AMD Dual-Core A6-4400M APU with Radeon HD 7520G Discrete-Class Graphics
Kernel version: 3.6.11-1.fc17.x86_64

error message:
[    1.066744] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug
[    1.067117] pci_root PNP0A08:00: ignoring host bridge window [mem 0x000cc000-0x000cffff] (conflicts with Video ROM [mem 0x000c0000-0x000cf9ff])
[    1.067129] pci_root PNP0A08:00: [Firmware Info]: MMCONFIG for domain 0000 [bus 00-3f] only partially covers this bridge
Comment 6 Josh Boyer 2013-03-14 17:46:58 UTC 
Is this still happening with 3.8.2 in updates-testing?  If so, could someone please summarize what the actual problem is?  What isn't working correctly?
Comment 7 collura 2013-03-21 07:48:49 UTC 
as of:

  kernel-3.8.3-201.fc18.x86_64
  xorg-x11-drv-ati-7.0.0-0.9.20121015gitbd9e2c064.fc18.x86_64

var log messages:
"
Mar 18 04:45:37 <removed> kernel: [    0.512944] pci_root PNP0A08:00: ACPI _OSC support notification failed, disabling PCIe ASPM
Mar 18 04:45:37 <removed> kernel: [    0.512948] pci_root PNP0A08:00: Unable to request _OSC control (_OSC support mask: 0x08)
Mar 18 04:45:37 <removed> kernel: [    0.513809] pci_root PNP0A08:00: ignoring host bridge window [mem 0x000cc000-0x000cffff] (conflicts with Video ROM [mem 0x000c0000-0x000cebff])
Mar 18 04:45:37 <removed> kernel: [    0.513816] pci_root PNP0A08:00: [Firmware Info]: MMCONFIG for domain 0000 [bus 00-0f] only partially covers this bridge
"

summary: 'conflicts with Video ROM' appears unfriendly.  if message is not as bad as seems then might be worth adding that to message. :')
Comment 8 Josh Boyer 2013-03-21 11:43:24 UTC 
So everything is working fine, you just see these in dmesg?  Is anything actually broken?
Comment 9 collura 2013-04-03 01:23:40 UTC 
when filed had various video related issues with no obviuos log messages.  (screen brightness setting/forgetfulness related issues.  forgetfullness still there but not sure if related.)  

an error about memory conflicts and video seem like good place to look.  

if memory conflict message is no problem them maybe i should file upstream to reword it.

thanks for looking it over. :')