Bug 14239

Summary:	"modprobe radeon modeset=1" prints kernel stack trace if monitor is not connected to second radeon videocard
Product:	Drivers	Reporter:	Mikhail Kshevetskiy (mikhail.kshevetskiy)
Component:	Video(DRI - non Intel)	Assignee:	drivers_video-dri
Status:	CLOSED OBSOLETE
Severity:	normal	CC:	alan
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	2.6.31-git16	Subsystem:
Regression:	No	Bisected commit-id:

Description Mikhail Kshevetskiy 2009-09-26 19:27:10 UTC

hello i've got the following kernel messages with kms enabled in linux-2.6.31-git16

I have two videocards: 
  -- primary:    integrated Radeon HD 3300
  -- additional: Radeon HD 4350

when both videocards have a monitor connected, then no problem occurred
if the monitor connected only to primary card, then the following kernel messages appears in dmesg:

[   68.976785] ------------[ cut here ]------------
[   68.979815] WARNING: at drivers/gpu/drm/drm_crtc_helper.c:953 drm_helper_initial_config+0x31/0x4a [drm_kms_helper]()
[   68.983080] Hardware name: System Product Name
[   68.986417] Connected connector with 0 modes
[   68.989804] Modules linked in: radeon(+) xt_mac xt_tcpudp ipt_ULOG xt_owner ipt_LOG xt_limit xt_state iptable_filter nf_nat_ftp nf_conntrack_irc nf_conntrack_ftp iptable_nat nf_nat ip_tables x_tables nf_conntrack_ipv4 nf_conntrack nf_defrag_ipv4 nls_utf8 nls_cp866 vfat fat ttm drm_kms_helper drm i2c_algo_bit fuse sbp2 loop dm_crypt dm_mod snd_hda_codec_atihdmi snd_hda_codec_realtek snd_emu10k1_synth snd_emux_synth snd_seq_virmidi snd_seq_midi_emul snd_hda_intel snd_emu10k1 usblp snd_ac97_codec ac97_bus snd_util_mem snd_hda_codec snd_seq_midi snd_rawmidi snd_hwdep snd_pcm_oss snd_seq_midi_event snd_mixer_oss snd_seq snd_pcm amd64_edac_mod snd_seq_device snd_timer i2c_piix4 k8temp edac_core shpchp pcspkr evdev i2c_core emu10k1_gp pci_hotplug gameport asus_atk0110 snd processor snd_page_alloc soundcore wmi reiserfs raid10 raid456 async_raid6_recov async_pq async_xor xor async_memcpy async_tx raid6_pq raid1 raid0 multipath linear md_mod ide_cd_mod cdrom sd_mod crc_t10dif usbhid ata_generic hid ide_pci_generic usb_storage firewire_ohci firewire_core crc_itu_t ahci ohci_hcd libata ohci1394 ieee1394 e100 mii sky2 atiixp ehci_hcd ide_core floppy scsi_mod thermal fan thermal_sys [last unloaded: radeon]
[   69.027085] Pid: 3457, comm: modprobe Not tainted 2.6.31-git16 #3
[   69.032435] Call Trace:
[   69.037813]  [<ffffffffa01e2887>] ? drm_helper_initial_config+0x31/0x4a [drm_kms_helper]
[   69.043419]  [<ffffffffa01e2887>] ? drm_helper_initial_config+0x31/0x4a [drm_kms_helper]
[   69.049009]  [<ffffffff8104d461>] ? warn_slowpath_common+0x77/0xa3
[   69.054670]  [<ffffffff8104d4e9>] ? warn_slowpath_fmt+0x51/0x59
[   69.060368]  [<ffffffffa01e2764>] ? drm_helper_probe_single_connector_modes+0x1a9/0x235 [drm_kms_helper]
[   69.066231]  [<ffffffffa01e2825>] ? drm_helper_probe_connector_modes+0x35/0x66 [drm_kms_helper]
[   69.072177]  [<ffffffffa01e2887>] ? drm_helper_initial_config+0x31/0x4a [drm_kms_helper]
[   69.078221]  [<ffffffffa05183c7>] ? radeon_modeset_init+0x4c1/0x4d2 [radeon]
[   69.084282]  [<ffffffffa0445306>] ? drm_get_dev+0x336/0x420 [drm]
[   69.090369]  [<ffffffff81190102>] ? local_pci_probe+0x12/0x16
[   69.096433]  [<ffffffff81190cc8>] ? pci_device_probe+0x58/0x80
[   69.102475]  [<ffffffff812082e1>] ? driver_probe_device+0xa3/0x14b
[   69.108500]  [<ffffffff812083d8>] ? __driver_attach+0x4f/0x6f
[   69.114523]  [<ffffffff81208389>] ? __driver_attach+0x0/0x6f
[   69.120465]  [<ffffffff81207ba8>] ? bus_for_each_dev+0x43/0x74
[   69.126356]  [<ffffffff8120756e>] ? bus_add_driver+0xaf/0x1f2
[   69.132236]  [<ffffffff8120868f>] ? driver_register+0xa7/0x111
[   69.138155]  [<ffffffffa055e000>] ? radeon_init+0x0/0xc0 [radeon]
[   69.144075]  [<ffffffff81190f02>] ? __pci_register_driver+0x50/0xb7
[   69.149998]  [<ffffffffa055e000>] ? radeon_init+0x0/0xc0 [radeon]
[   69.155921]  [<ffffffff8100a065>] ? do_one_initcall+0x64/0x174
[   69.161850]  [<ffffffff8107ad84>] ? sys_init_module+0xc5/0x21a
[   69.167778]  [<ffffffff81010ac2>] ? system_call_fastpath+0x16/0x1b
[   69.173724] ---[ end trace 78b551a70e2c8a7f ]---