lspci returns error on devices that don't have pci adapters (arm)

The output from a normal console:

ubuntu@beagle-maverick:~$ lspci -vvnn
pcilib: Cannot open /proc/bus/pci
lspci: Cannot find any working access method.

This patch is just a simple fix the issue by verifying the return string of the command lspci.

The proper fix would probably involve checking correctly the output from command_output, but then depends on how do you want to display the error when it happens.

Setting medium as this only affects arm but does prevent it from reporting linux bugs.

hrw@efika:/tmp$ diff -u hookutils.py.orig hookutils.py
--- hookutils.py.orig 2011-03-02 16:06:36.872525099 +0100
+++ hookutils.py 2011-03-02 16:06:26.762526842 +0100
@@ -407,6 +407,11 @@
 def pci_devices(*pci_classes):
     '''Return a text dump of PCI devices attached to the system.'''

+ try:
+ os.stat("/proc/bus/pci")
+ except:
+ return ""
+
     if not pci_classes:
         return command_output(['lspci', '-vvnn'])

This change will work on any PCI-less system (as long as /proc/bus/ interface is present) and does not require to call lspci.

Other option is to check for /sys/bus/pci/

Slightly different patch pushed to trunk, thanks Marcin!

This bug was fixed in the package apport - 1.20-0ubuntu1

---------------
apport (1.20-0ubuntu1) natty; urgency=low

  * New upstream release. Changes since our previous snapshot:
    - Add support for -w/--window option which will enable user to select a
      window as a target for filing a problem report. Thanks Abhinav Upadhyay.
      (LP: #357847)
    - Disable the filtering on SIGABRT without assertion messages. Turns out
      that developers want these crash reports after all. (LP: #729223)
    - Add support for a "DuplicateSignature" report fields. This allows
      package hooks to implement custom duplicate problem handling which
      doesn't need to be hardcoded in Apport itself. Update the launchpad
      backend to tag such bugs as "need-duplicate-check".
    - hookutils.py Update WifiSyslog regex to correctly catch application log
      messages in syslog. Thanks Mathieu Trudel-Lapierre. (LP: #732917)
    - hookutils.py, attach_hardware(): Avoid error message if machine does not
      have a PCI bus. Thanks Marcin Juszkiewicz. (LP: #608449)
    - backends/packaging-apt-dpkg.py: Replace deprecated getChanges() call
      with get_changes().
    - apport-gtk: Fix broken dialog heading if the name of the crashed program
      contains an & or other markup specific characters.
    - apport-gtk: Don't crash if GTK cannot be initialized. This usually
      happens without a $DISPLAY or when the session is being shut down. Just
      print an error message. If there are pending crashes, they will be shown
      again the next time a session starts. (LP: #730569)
  * debian/local/apport-chroot: In retracing mode, fix the passed --auth and
    --duplicate-db arguments to be paths within the fakechroot.
  * debian/local/apport-chroot: Apply the same absolute path fix to retracing
    mode that we already applied to login mode in 1.19-0ubuntu1.
 -- Martin Pitt <email address hidden> Fri, 18 Mar 2011 16:39:07 +0100

Same issue here in 2020.

=======================
➜ fa sudo lspci
pcilib: Cannot open /proc/bus/pci
lspci: Cannot find any working access method.
➜ fa uname -a
Linux retropie 4.14.98-v7+ #1200 SMP Tue Feb 12 20:27:48 GMT 2019 armv7l GNU/Linux
➜ fa whoami
root
➜ fa lspci
pcilib: Cannot open /proc/bus/pci
lspci: Cannot find any working access method.
➜ fa

=======================

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