Message-Id: <201111152305.09451.sftp.mtuci@gmail.com>
Date:	Tue, 15 Nov 2011 23:05:08 +0400
From:	"Sergey V." <sftp.mtuci@...il.com>
To:	David Airlie <airlied@...ux.ie>
Cc:	Alex Deucher <alexander.deucher@....com>,
	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: radeon/kms: black screen when loading radeon with modeset=1

Kernel from Linus tree, HEAD at 7f80850d3f9fd8fda23a317044aef3a6bafab06b

Loading radeon module with modeset=1 causes black screen.

Usually it happens at boot time, but if run kernel with radeon.modeset=0 then 
`rmmod radeon; modprobe radeon modeset=1` I can get dmesg over ssh (thanks to 
glisse from #radeon for help).

Backtrace below:

[   89.905890] BUG: unable to handle kernel NULL pointer dereference at 
0000000000000008
[   89.906016] IP: [<ffffffffa05998ed>] 
radeon_atombios_parse_power_table_1_3+0x13d/0x810 [radeon]
[   89.906016] PGD 6a0e1067 PUD 6a09d067 PMD 0 
[   89.906016] Oops: 0002 [#1] SMP 
[   89.906016] CPU 0 
[   89.906016] Modules linked in: radeon(+) snd_seq_dummy snd_seq_oss 
snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss ipv6 btrfs 
cpufreq_ondemand powernow_k8 freq_table mperf lp ppdev parport_pc parport fuse 
snd_hda_codec_hdmi snd_hda_codec_realtek processor ttm drm_kms_helper drm 
thermal i2c_piix4 joydev agpgart video snd_hda_intel r8169 thermal_sys 
i2c_algo_bit i2c_core k8temp battery sdhci_pci snd_hda_codec evdev hwmon mii 
button ac shpchp sdhci snd_hwdep snd_pcm psmouse serio_raw mmc_core snd_timer 
sg snd soundcore snd_page_alloc [last unloaded: radeon]
[   89.906016] 
[   89.906016] Pid: 2189, comm: modprobe Tainted: G        W    3.2.0-rc1+ #4 
Micro-Star International PR210/MS-1222
[   89.906016] RIP: 0010:[<ffffffffa05998ed>]  [<ffffffffa05998ed>] 
radeon_atombios_parse_power_table_1_3+0x13d/0x810 [radeon]
[   89.906016] RSP: 0018:ffff880075959948  EFLAGS: 00010246
[   89.906016] RAX: 0000000000000000 RBX: ffff880075b72000 RCX: 
0000000000000000
[   89.906016] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 
ffff880076c73c00
[   89.906016] RBP: ffff880075959a98 R08: 0000000000000000 R09: 
ffff880076c73a00
[   89.906016] R10: ffff8800758a0000 R11: 0000000000000006 R12: 
ffff8800758aadde
[   89.906016] R13: ffff8800758aadde R14: 0000000000000000 R15: 
0000000000000000
[   89.906016] FS:  00007f57d0b27720(0000) GS:ffff88007bc00000(0000) 
knlGS:00000000f702a6d0
[   89.906016] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[   89.906016] CR2: 0000000000000008 CR3: 000000006a0a6000 CR4: 
00000000000006f0
[   89.906016] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 
0000000000000000
[   89.906016] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 
0000000000000400
[   89.906016] Process modprobe (pid: 2189, threadinfo ffff880075958000, task 
ffff880075abc6d0)
[   89.906016] Stack:
[   89.906016]  ffff88000000ffff ffff8800768f400a ffff880000000000 
00ffffff00000000
[   89.906016]  ffff880037653663 ffff880075b73158 ffff880075b73174 
0000000675959acf
[   89.906016]  ffffffff81b6112c ffff880075959a38 ffffffff81b6112e 
ffff880075959ad5
[   89.906016] Call Trace:
[   89.906016]  [<ffffffff81289dce>] ? vsnprintf+0x31e/0x5d0
[   89.906016]  [<ffffffff81289dce>] ? vsnprintf+0x31e/0x5d0
[   89.906016]  [<ffffffff81076511>] ? up+0x31/0x50
[   89.906016]  [<ffffffff81050494>] ? console_unlock+0x1c4/0x230
[   89.906016]  [<ffffffffa059cb98>] 
radeon_atombios_get_power_modes+0x228/0x8e0 [radeon]
[   89.906016]  [<ffffffffa05e7e01>] radeon_pm_init+0x3b1/0x590 [radeon]
[   89.906016]  [<ffffffffa05d0039>] ? rs600_irq_set+0x109/0x180 [radeon]
[   89.906016]  [<ffffffffa05b7ca9>] radeon_modeset_init+0x4c9/0x8a0 [radeon]
[   89.906016]  [<ffffffffa05fb3dc>] ? radeon_acpi_init+0x8c/0xbc [radeon]
[   89.906016]  [<ffffffffa0598760>] radeon_driver_load_kms+0x120/0x170 
[radeon]
[   89.906016]  [<ffffffffa024d82e>] drm_get_pci_dev+0x18e/0x2c0 [drm]
[   89.906016]  [<ffffffffa05fb4b9>] radeon_pci_probe+0xad/0xb5 [radeon]
[   89.906016]  [<ffffffff812a8edf>] local_pci_probe+0x5f/0xd0
[   89.906016]  [<ffffffff812a97b8>] pci_device_probe+0x88/0xb0
[   89.906016]  [<ffffffff81331bca>] ? driver_sysfs_add+0x7a/0xb0
[   89.906016]  [<ffffffff81331ed6>] driver_probe_device+0x96/0x1b0
[   89.906016]  [<ffffffff81332093>] __driver_attach+0xa3/0xb0
[   89.906016]  [<ffffffff81331ff0>] ? driver_probe_device+0x1b0/0x1b0
[   89.906016]  [<ffffffff81330e9e>] bus_for_each_dev+0x5e/0x90
[   89.906016]  [<ffffffff81331b4e>] driver_attach+0x1e/0x20
[   89.906016]  [<ffffffff81331745>] bus_add_driver+0x155/0x280
[   89.906016]  [<ffffffff81332676>] driver_register+0x76/0x140
[   89.906016]  [<ffffffff812a9a45>] __pci_register_driver+0x55/0xd0
[   89.906016]  [<ffffffffa024da71>] drm_pci_init+0x111/0x120 [drm]
[   89.906016]  [<ffffffffa0639000>] ? 0xffffffffa0638fff
[   89.906016]  [<ffffffffa0639000>] ? 0xffffffffa0638fff
[   89.906016]  [<ffffffffa06390ec>] radeon_init+0xec/0xee [radeon]
[   89.906016]  [<ffffffff810002d4>] do_one_initcall+0x44/0x170
[   89.906016]  [<ffffffff8108c332>] sys_init_module+0x92/0x1e0
[   89.906016]  [<ffffffff817fba6b>] system_call_fastpath+0x16/0x1b
[   89.906016] Code: 16 44 3b b5 ec fe ff ff 0f 8d 40 01 00 00 48 8b 83 58 11 
00 00 49 63 cf 48 89 ca 48 c1 e1 06 48 c1 e2 04 48 29 d1 48 8b 44 08 08 <c7> 
40 08 00 00 00 00 0f b6 45 8f 3c 02 75 ac 4c 8b 83 58 11 00 
[   89.906016] RIP  [<ffffffffa05998ed>] 
radeon_atombios_parse_power_table_1_3+0x13d/0x810 [radeon]
[   89.906016]  RSP <ffff880075959948>
[   89.906016] CR2: 0000000000000008
[   89.918682] ---[ end trace 758728fd12807b58 ]---

Whole dmesg output attached.

View attachment "dmesg" of type "text/plain" (68668 bytes)

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