[Bug 58914] New: Cannot start Radeon driver: "drmOpenByBusid: drmGetBusid reports " no bus ID

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=58914

          Priority: medium
            Bug ID: 58914
          Assignee: dri-devel at lists.freedesktop.org
           Summary: Cannot start Radeon driver: "drmOpenByBusid:
                    drmGetBusid reports " no bus ID
          Severity: blocker
    Classification: Unclassified
                OS: Linux (All)
          Reporter: david.hagood at gmail.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: XOrg CVS
         Component: DRM/Radeon
           Product: DRI

Created attachment 72358
  --> https://bugs.freedesktop.org/attachment.cgi?id=72358&action=edit
X Start up log messages

The Radeon driver will not load with the Radeon kernel drivers in Linux 3.8.0

The following is an excerpt from the startup:

[   109.112] (II) Loading extension DRI2
[   109.112] (II) LoadModule: "radeon"
[   109.112] (II) Loading /usr/lib/xorg/modules/drivers/radeon_drv.so
[   109.112] (II) Module radeon: vendor="X.Org Foundation"
[   109.112]    compiled for 1.12.3, module version = 7.0.99
[   109.112]    Module class: X.Org Video Driver
[   109.112]    ABI class: X.Org Video Driver, version 12.0
[   109.112] (II) RADEON: Driver for ATI Radeon chipsets:
        ATI Radeon Mobility X600 (M24) 3150 (PCIE), ATI FireMV 2400 (PCI),
(many cards snipped)
[   109.114] (--) using VT number 8

[   109.119] (II) [KMS] Kernel modesetting enabled.
[   109.120] (II) RADEON(0): Creating default Display subsection in Screen
section
        "Default Screen Section" for depth/fbbpp 24/32
[   109.120] (==) RADEON(0): Depth 24, (--) framebuffer bpp 32
[   109.120] (II) RADEON(0): Pixel depth = 24 bits stored in 4 bytes (32 bpp
pixmaps)
[   109.120] (==) RADEON(0): Default visual is TrueColor
[   109.120] (==) RADEON(0): RGB weight 888
[   109.120] (II) RADEON(0): Using 8 bits per RGB (8 bit DAC)
[   109.120] (--) RADEON(0): Chipset: "ATI Radeon HD 4350" (ChipID = 0x954f)
[   109.120] drmOpenDevice: node name is /dev/dri/card0
[   109.120] drmOpenDevice: open result is 9, (OK)
[   109.120] drmOpenByBusid: Searching for BusID pci:0000:04:00.0
[   109.120] drmOpenDevice: node name is /dev/dri/card0
[   109.120] drmOpenDevice: open result is 9, (OK)
[   109.120] drmOpenByBusid: drmOpenMinor returns 9
[   109.120] drmOpenByBusid: Searching for BusID pci:0000:04:00.0
[   109.120] drmOpenDevice: node name is /dev/dri/card0
[   109.120] drmOpenDevice: open result is 9, (OK)
[   109.120] drmOpenByBusid: drmOpenMinor returns 9
[   109.120] drmOpenByBusid: Interface 1.4 failed, trying 1.1
[   109.120] drmOpenByBusid: drmGetBusid reports 

That last line is not a copy/paste issue - it literally is
"[   109.120] drmOpenByBusid: drmGetBusid reports "

(as in, there is no bus ID given)

Then the X Radeon driver looks for any other DRI node, fails, and dies.

[   109.120] drmOpenDevice: node name is /dev/dri/card1
[   109.125] drmOpenByBusid: drmOpenMinor returns -1
(snip many other searches)
[   109.170] drmOpenDevice: node name is /dev/dri/card14
[   109.174] drmOpenByBusid: drmOpenMinor returns -1
[   109.174] drmOpenDevice: node name is /dev/dri/card15
[   109.178] drmOpenByBusid: drmOpenMinor returns -1
[   109.178] drmOpenDevice: node name is /dev/dri/card0
[   109.178] drmOpenDevice: open result is 9, (OK)
[   109.178] drmOpenDevice: node name is /dev/dri/card0
[   109.178] drmOpenDevice: open result is 9, (OK)
[   109.178] drmGetBusid returned ''
[   109.178] (EE) RADEON(0): [drm] failed to set drm interface version.
[   109.178] (EE) RADEON(0): Kernel modesetting setup failed
[   109.178] (II) UnloadModule: "radeon"
[   109.178] (EE) Screen(s) found, but none have a usable configuration.

I have tried the following:
1) adding the following parameters in /etc/modprobe.d/radeon.conf
   options radeon modeset=1 dynclks=1 gartsize=256 audio=1 pcie_gen2=-1 msi=1
2) Adding the following to /etc/initramfs-tools/modules
   radeon modeset=1 dynclks=1 gartsize=256 audio=1 pcie_gen2=-1 msi=1
and rebuilding the ramdisk.

The kernel has the following configuration with respect to the Radeon drivers:
CONFIG_DRM_RADEON=m
CONFIG_DRM_RADEON_KMS=y
# CONFIG_FB_RADEON is not set

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