[Bug 28106] New: radeon KMS causes hardware conflict/interference with Intel wifi and audio, crashes wireless

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=28106

           Summary: radeon KMS causes hardware conflict/interference with
                    Intel wifi and audio, crashes wireless
           Product: xorg
           Version: 7.5
          Platform: x86 (IA32)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: jasonporter at gmail.com
         QAContact: xorg-team at lists.x.org


Several Launchpad bug reports in process report radeon KMS conflicts with Intel
wifi and audio output, causing wireless to hang/drop until power cycle and
audio to crackle during any high GPU load.  Disabling KMS as a workaround
returns normal system operation.

Relevant Launchpad reports:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/564376
https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/578342
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/571770
And one on Bugzilla:
https://bugzilla.kernel.org/show_bug.cgi?id=15912

My own hardware is a Thinkpad T60 with Radeon X1400 and Intel wireless (iwl3945
driver) running vanilla Ubuntu 10.04.  Users of Radeon X1250, X1300, and Xpress
200M chipsets have also reported the same behavior, on Lenovo, Dell and LG
laptops.  Using a mainline kernel does not change the behavior.

This may possibly be due to a difference in PCI configuration between KMS and
UMS, they use different IRQs for "Pin A" as detailed in the Bugzilla report
linked above.

Thanks for any assistance you can provide!  And thanks for all your hard work!

-- 
Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.