[Bug 36173] oopses somewhere in radeon

[Colin Watson]

Public bug reported:
https://launchpad.net/malone/bugs/36173

Affects: linux-source-2.6.15 (Ubuntu)
       Severity: Normal
       Priority: (none set)
         Status: Unconfirmed

Description:
I'm afraid I can't give you any reproduction recipe more detailed than
"my laptop seems to crash whenever my wife tries to switch to her user".
It's a 15" PowerBook with this graphics card:

0000:00:10.0 VGA compatible controller: ATI Technologies Inc RV350
[Mobility Radeon 9600 M10]

Here's the syslog output from the crash:

[63449.447500] Machine check in kernel mode.
[63449.447523] Caused by (from SRR1=149030): Transfer error ack signal
[63449.447541] Oops: Machine check, sig: 7 [#1]
[63449.447548] Modules linked in: nls_utf8 hfsplus hfs nls_cp437 loop isofs x25 appletalk ipx rose netrom ax25 binfmt_misc rfcomm l2cap radeon drm cpufreq_userspace cpufreq_stats cpufreq_powersave cpufreq_ondemand cpufreq_conservative ipv6 af_packet dm_mod md_mod therm_adt746x sr_mod snd_powermac snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd soundcore snd_page_alloc sbp2 scsi_mod apm_emu prism54 pcmcia hci_usb bluetooth ohci1394 ieee1394 sungem sungem_phy uninorth_agp agpgart bcm43xx yenta_socket rsrc_nonstatic pcmcia_core ieee80211softmac ieee80211 ieee80211_crypt evdev tsdev ext3 jbd ehci_hcd ohci_hcd usbcore ide_disk ide_cd cdrom i2c_keywest capability commoncap
[63449.447652] NIP: E26B4C9C LR: E261F120 CTR: E26B4D50
[63449.447663] REGS: dd931dd0 TRAP: 0200   Not tainted  (2.6.15-18-powerpc)
[63449.447672] MSR: 00149030 <EE,ME,IR,DR>  CR: 28004422  XER: 00000000
[63449.447691] TASK = c1bc1870[4174] 'Xorg' THREAD: dd930000
[63449.447698] GPR00: 3FD88BD4 DD931E80 C1BC1870 E26C7110 E26C6660 00000036 00000036 000003E9
[63449.447718] GPR08: 000000CC E2600000 00000036 DC7909A0 28004428 101E024C 101D8448 101D8424
[63449.447738] GPR16: 101D8D2C 101D8CDC 101D8CDC 101E9B28 7FCB35D0 101D8448 00000000 DC7A4600
[63449.447757] GPR24: E2630000 DE9B1D20 20006444 DF36FF60 00000044 000000D4 DFA94024 C1EE9000
[63449.447778] NIP [E26B4C9C] radeon_do_cp_idle+0x14c/0x200 [radeon]
[63449.447821] LR [E261F120] drm_ioctl+0xe0/0x230 [drm]
[63449.447879] Call Trace:
[63449.447886] [DD931E80] [101D8CDC] 0x101d8cdc (unreliable)
[63449.447902] [DD931EA0] [E261F120] drm_ioctl+0xe0/0x230 [drm]
[63449.447931] [DD931ED0] [C0097514] do_ioctl+0x84/0x90
[63449.447948] [DD931EE0] [C00975AC] vfs_ioctl+0x8c/0x4b0
[63449.447960] [DD931F10] [C0097A64] sys_ioctl+0x94/0xb0
[63449.447972] [DD931F40] [C00115DC] ret_from_syscall+0x0/0x4c
[63449.447989] --- Exception: c01 at 0xfd392d8
[63449.448004]     LR = 0xfdbc5fc
[63449.448009] Instruction dump:
[63449.448044] Machine check in kernel mode.
[63449.448051] Caused by (from SRR1=149030): Transfer error ack signal
[63449.448060] Oops: Machine check, sig: 7 [#2]
[63449.448065] Modules linked in: nls_utf8 hfsplus hfs nls_cp437 loop isofs x25 appletalk ipx rose netrom ax25 binfmt_misc rfcomm l2cap radeon drm cpufreq_userspace cpufreq_stats cpufreq_powersave cpufreq_ondemand cpufreq_conservative ipv6 af_packet dm_mod md_mod therm_adt746x sr_mod snd_powermac snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd soundcore snd_page_alloc sbp2 scsi_mod apm_emu prism54 pcmcia hci_usb bluetooth ohci1394 ieee1394 sungem sungem_phy uninorth_agp agpgart bcm43xx yenta_socket rsrc_nonstatic pcmcia_core ieee80211softmac ieee80211 ieee80211_crypt evdev tsdev ext3 jbd ehci_hcd ohci_hcd usbcore ide_disk ide_cd cdrom i2c_keywest capability commoncap
[63449.448145] NIP: C0146678 LR: C0146650 CTR: 00000006
[63449.448153] REGS: dfb6de60 TRAP: 0200   Not tainted  (2.6.15-18-powerpc)
[63449.448161] MSR: 00149030 <EE,ME,IR,DR>  CR: 22008042  XER: 20000000
[63449.448175] TASK = dffc0610[4] 'events/0' THREAD: dfb6c000
[63449.448181] GPR00: 2C4C007C DFB6DF10 DFFC0610 00000000 DFB6DEF8 0000000C 00022C6B 00000001
[63449.448197] GPR08: E1010000 C02C0000 C216404C 00000062 82008028 00000000 00000000 41400000
[63449.448213] GPR16: 0171D48C 0171D490 0023FAB8 0023FB04 0023FABC 0171C448 0166EEF0 0171DAC8
[63449.448230] GPR24: 00000000 C02B0000 C02B90F4 DFFC8C60 00000001 001E8480 0000000F DFFC8240
[63449.448246] NIP [C0146678] radeon_set_backlight_enable+0xa8/0x830
[63449.448271] LR [C0146650] radeon_set_backlight_enable+0x80/0x830
[63449.448283] Call Trace:
[63449.448288] [DFB6DF10] [C0146650] radeon_set_backlight_enable+0x80/0x830 (unreliable)
[63449.448304] [DFB6DF30] [C0021D1C] backlight_callback+0x13c/0x170
[63449.448328] [DFB6DF60] [C0040A98] worker_thread+0x188/0x230
[63449.448341] [DFB6DFC0] [C00463A8] kthread+0x108/0x110
[63449.448358] [DFB6DFF0] [C00128F8] kernel_thread+0x44/0x60
[63449.448372] Instruction dump:
[63449.448377] 63bd8480 4bef1f75 4800001c 60000000 60000000 60000000 4bec6d91 37bdffff
[63449.448394] 41820754 811f0358 38080e40 7c00042c <0c000000> 4c00012c 5400067e 38600001
[63449.448412]  815f0010 812b0010 38090714 7d40052c 7c0006ac 60000000 60000000 60000000
[63449.448457] 817f00d8 812b0010 38090710 7c00042c <0c000000> 4c00012c 80010024 7fe3fb78