Created attachment 45600 [details]
kernel.log

Radeon driver crash with module parameter modeset=1.

HW environment: M4A88TD-V EVO/USB3 motherboard, AMD Phenom x6 CPU, 8GB RAM, 32 bit Linux OS. 2.6.39-rc3+ kernel.

Integrated graphic card:

goldenfish@goldenfish:~$ lspci -s "01:05.0" 
01:05.0 VGA compatible controller: ATI Technologies Inc RS880 [Radeon HD 4250]

Steps to reproduce:
0) boot with parameter radeon.modeset=0 .With parameter radeon.modeset=1 computer crash.
1) stop X-server
2) unload module radeon
3) load radeon module: modprobe radeon modeset=1

I got this Oops:

Apr 13 21:40:30 goldenfish kernel: ------------[ cut here ]------------
Apr 13 21:40:30 goldenfish kernel: kernel BUG at drivers/gpu/drm/drm_irq.c:923!
Apr 13 21:40:30 goldenfish kernel: invalid opcode: 0000 [#2] SMP 
Apr 13 21:40:30 goldenfish kernel: last sysfs file: /sys/devices/pci0000:00/0000:00:01.0/0000:01:05.0/graphics/fb0/uevent
Apr 13 21:40:30 goldenfish kernel: Modules linked in: radeon(+) tcp_diag inet_diag binfmt_misc battery ipv6 powernow_k8 mperf cpufreq_ondemand cpufreq_stats freq_table cpufreq_userspace cpufreq_conservative cpufreq_powersave loop usbhid hid snd_hda_codec_hdmi snd_hda_codec_realtek snd_ice1724 snd_ice17xx_ak4xxx snd_ac97_codec snd_hda_intel ac97_bus snd_hda_codec snd_ak4xxx_adda snd_seq_dummy snd_hwdep snd_ak4114 snd_pt2258 snd_i2c snd_seq_oss snd_ak4113 snd_pcm_oss snd_seq_midi snd_mixer_oss snd_rawmidi snd_pcm snd_seq_midi_event snd_seq ohci_hcd snd_timer snd_seq_device snd xhci_hcd rtc_cmos rtc_core firewire_ohci(+) ehci_hcd soundcore usbcore firewire_core ttm rtc_lib drm_kms_helper r8169 snd_page_alloc drm processor asus_atk0110 evdev crc_itu_t button [last unloaded: radeon]
Apr 13 21:40:30 goldenfish kernel: 
Apr 13 21:40:30 goldenfish kernel: Pid: 4657, comm: work_for_cpu Tainted: G      D     2.6.39-rc3+ #171 System manufacturer System Product Name/M4A88TD-V EVO/USB3
Apr 13 21:40:30 goldenfish kernel: EIP: 0060:[<f8370ab8>] EFLAGS: 00010246 CPU: 0
Apr 13 21:40:30 goldenfish kernel: EIP is at drm_vblank_put+0x16/0x4f [drm]
Apr 13 21:40:30 goldenfish kernel: EAX: 00000000 EBX: f23cfc00 ECX: f23cfc00 EDX: f1e08c40
Apr 13 21:40:30 goldenfish kernel: ESI: 00000000 EDI: f23cfd70 EBP: f1f29a40 ESP: f1f29a38
Apr 13 21:40:30 goldenfish kernel:  DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
Apr 13 21:40:30 goldenfish kernel: Process work_for_cpu (pid: 4657, ti=f1f28000 task=f16264f0 task.ti=f1f28000)
Apr 13 21:40:30 goldenfish kernel: Stack:
Apr 13 21:40:30 goldenfish kernel:  f23cfc00 00000000 f1f29a54 f8370b3c f1cbd000 f166a000 f23cfc00 f1f29a68
Apr 13 21:40:30 goldenfish kernel:  f866907c f1cbd000 f23cfea0 f23418d0 f1f29a74 f86690e2 f86e039c f1f29c48
Apr 13 21:40:30 goldenfish kernel:  f854952c 00000000 00000000 00000000 f86de5e4 f23cfea4 f1675480 01000000
Apr 13 21:40:30 goldenfish kernel: Call Trace:
Apr 13 21:40:30 goldenfish kernel:  [<f8370b3c>] drm_vblank_post_modeset+0x4b/0x5d [drm]
Apr 13 21:40:30 goldenfish kernel:  [<f866907c>] atombios_crtc_dpms+0x6b/0xc4 [radeon]
Apr 13 21:40:30 goldenfish kernel:  [<f86690e2>] atombios_crtc_commit+0xd/0x19 [radeon]
Apr 13 21:40:30 goldenfish kernel:  [<f854952c>] drm_crtc_helper_set_mode+0x2d4/0x3ac [drm_kms_helper]
Apr 13 21:40:30 goldenfish kernel:  [<f8549cab>] drm_crtc_helper_set_config+0x5b4/0x79a [drm_kms_helper]
Apr 13 21:40:30 goldenfish kernel:  [<f85483d3>] drm_fb_helper_set_par+0x5c/0x97 [drm_kms_helper]
Apr 13 21:40:30 goldenfish kernel:  [<c1197dbc>] fbcon_init+0x2c1/0x3aa
Apr 13 21:40:30 goldenfish kernel:  [<c11f6c11>] visual_init+0xd2/0x127
Apr 13 21:40:30 goldenfish kernel:  [<c11f79d3>] bind_con_driver+0x217/0x305
Apr 13 21:40:30 goldenfish kernel:  [<c11f7ae9>] take_over_console+0x28/0x33
Apr 13 21:40:30 goldenfish kernel:  [<c119724e>] fbcon_takeover+0x53/0x8d
Apr 13 21:40:30 goldenfish kernel:  [<c119a445>] fbcon_event_notify+0x1ea/0x4f1
Apr 13 21:40:30 goldenfish kernel:  [<c10e7b84>] ? sysfs_add_one+0x12/0x80
Apr 13 21:40:30 goldenfish kernel:  [<c10473d9>] notifier_call_chain+0x26/0x48
Apr 13 21:40:30 goldenfish kernel:  [<c1047594>] __blocking_notifier_call_chain+0x34/0x48
Apr 13 21:40:30 goldenfish kernel:  [<c10475b4>] blocking_notifier_call_chain+0xc/0xe
Apr 13 21:40:30 goldenfish kernel:  [<c118dee9>] fb_notifier_call_chain+0x11/0x13
Apr 13 21:40:30 goldenfish kernel:  [<c118ed3c>] register_framebuffer+0x202/0x214
Apr 13 21:40:30 goldenfish kernel:  [<f85485c5>] drm_fb_helper_single_fb_probe+0x1b7/0x241 [drm_kms_helper]
Apr 13 21:40:30 goldenfish kernel:  [<f8548a47>] drm_fb_helper_initial_config+0x3f8/0x405 [drm_kms_helper]
Apr 13 21:40:30 goldenfish kernel:  [<c10e7b84>] ? sysfs_add_one+0x12/0x80
Apr 13 21:40:30 goldenfish kernel:  [<f8547907>] ? drm_fb_helper_init+0xb6/0x12f [drm_kms_helper]
Apr 13 21:40:30 goldenfish kernel:  [<f85479b4>] ? drm_fb_helper_single_add_all_connectors+0x34/0x9c [drm_kms_helper]
Apr 13 21:40:30 goldenfish kernel:  [<f8684e7b>] radeon_fbdev_init+0xb0/0xba [radeon]
Apr 13 21:40:30 goldenfish kernel:  [<f867fa8f>] radeon_modeset_init+0x793/0x7a5 [radeon]
Apr 13 21:40:30 goldenfish kernel:  [<f866277e>] radeon_driver_load_kms+0xbd/0xec [radeon]
Apr 13 21:40:30 goldenfish kernel:  [<f8374999>] drm_get_pci_dev+0x12d/0x20c [drm]
Apr 13 21:40:30 goldenfish kernel:  [<f86dc8df>] radeon_pci_probe+0xb3/0xba [radeon]
Apr 13 21:40:30 goldenfish kernel:  [<c103f43b>] ? cwq_dec_nr_in_flight+0x64/0x64
Apr 13 21:40:30 goldenfish kernel:  [<c1184ea2>] local_pci_probe+0xe/0x10
Apr 13 21:40:30 goldenfish kernel:  [<c103f447>] do_work_for_cpu+0xc/0x1b
Apr 13 21:40:30 goldenfish kernel:  [<c1043a09>] kthread+0x62/0x67
Apr 13 21:40:30 goldenfish kernel:  [<c10439a7>] ? kthread_worker_fn+0x107/0x107
Apr 13 21:40:30 goldenfish kernel:  [<c12f1776>] kernel_thread_helper+0x6/0xd
Apr 13 21:40:30 goldenfish kernel: Code: b0 64 01 00 00 01 de 8b 36 39 f2 75 cd 89 d0 5a 5b 5e 5f 5d c3 55 89 c1 89 e5 56 53 c1 e2 02 03 90 74 01 00 00 8b 02 85 c0 75 02 <0f> 0b f0 ff 0a 0f 94 c0 84 c0 74 29 a1 64 68 38 f8 85 c0 74 20 
Apr 13 21:40:30 goldenfish kernel: EIP: [<f8370ab8>] drm_vblank_put+0x16/0x4f [drm] SS:ESP 0068:f1f29a38
Apr 13 21:40:30 goldenfish kernel: ---[ end trace 7da9328bd40673d3 ]---