[Bug 199621] New: iMac 2009, Mobility Radeon HD 4670: black screen on boot

bugzilla-daemon at bugzilla.kernel.org bugzilla-daemon at bugzilla.kernel.org
Fri May 4 07:57:25 UTC 2018 

https://bugzilla.kernel.org/show_bug.cgi?id=199621

            Bug ID: 199621
           Summary: iMac 2009, Mobility Radeon HD 4670: black screen on
                    boot
           Product: Drivers
           Version: 2.5
    Kernel Version: 4.15.0-20
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri at kernel-bugs.osdl.org
          Reporter: floe at butterbrot.org
        Regression: No

I'm running Ubuntu 18.04 on a old-ish iMac from 2009. As soon as the kernel
modesetting kicks in, I only get a black screen. This is not a duplicate of
https://bugzilla.kernel.org/show_bug.cgi?id=100301 - if I try to enable the
screen via sysfs or xrandr, I get the following oops in dmesg:

May  4 09:17:19 igor01 kernel: [ 1193.227376] ------------[ cut here
]------------
May  4 09:17:19 igor01 kernel: [ 1193.227377] unknown DP link BW code 0, using
162000
May  4 09:17:19 igor01 kernel: [ 1193.227401] WARNING: CPU: 1 PID: 915 at
/build/linux-5s7Xkn/linux-4.15.0/drivers/gpu/drm/drm_dp_helper.c:157
drm_dp_bw_code_to_link_rate+0x41/0x50 [drm_kms_helper]
May  4 09:17:19 igor01 kernel: [ 1193.227401] Modules linked in: rfcomm ccm
bnep snd_hda_codec_cirrus snd_hda_codec_generic applesmc input_polldev arc4
coretemp kvm_intel kvm irqbypass uvcvideo videobuf2_vmalloc
 joydev input_leds btusb btrtl btbcm btintel videobuf2_memops videobuf2_v4l2
bluetooth ecdh_generic videobuf2_core videodev media ath9k ath9k_common
ath9k_hw ath mac80211 cfg80211 snd_hda_codec_hdmi snd_hda_inte
l snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event
snd_rawmidi shpchp snd_seq snd_seq_device snd_timer snd soundcore apple_bl
mac_hid sch_fq_codel parport_pc ppdev lp parport ip_table
s x_tables autofs4 hid_appleir uas usb_storage hid_generic usbhid hid pata_acpi
radeon i2c_algo_bit ttm firewire_ohci drm_kms_helper syscopyarea sysfillrect
firewire_core sysimgblt crc_itu_t forcedeth fb_sys_fop
s
May  4 09:17:19 igor01 kernel: [ 1193.227454]  ahci drm libahci i2c_nforce2
May  4 09:17:19 igor01 kernel: [ 1193.227459] CPU: 1 PID: 915 Comm: Xorg
Tainted: G        W        4.15.0-20-generic #21-Ubuntu
May  4 09:17:19 igor01 kernel: [ 1193.227460] Hardware name: Apple Inc.
iMac10,1/Mac-F2268DC8, BIOS    IM101.88Z.00CC.B00.0909031926 09/03/09
May  4 09:17:19 igor01 kernel: [ 1193.227467] RIP:
0010:drm_dp_bw_code_to_link_rate+0x41/0x50 [drm_kms_helper]
May  4 09:17:19 igor01 kernel: [ 1193.227469] RSP: 0018:ffff9e06415e7ad8
EFLAGS: 00010282
May  4 09:17:19 igor01 kernel: [ 1193.227471] RAX: 0000000000000000 RBX:
ffff8f00362f1000 RCX: 0000000000000006
May  4 09:17:19 igor01 kernel: [ 1193.227472] RDX: 0000000000000007 RSI:
0000000000000096 RDI: ffff8f003fd16490
May  4 09:17:19 igor01 kernel: [ 1193.227474] RBP: ffff9e06415e7ae0 R08:
0000000000000001 R09: 0000000000000fe6
May  4 09:17:19 igor01 kernel: [ 1193.227475] R10: 0000000000000040 R11:
0000000000000000 R12: 000000000000fde8
May  4 09:17:19 igor01 kernel: [ 1193.227477] R13: ffff8f00362f1000 R14:
0000000000000018 R15: ffff8f002b0bddc4
May  4 09:17:19 igor01 kernel: [ 1193.227479] FS:  00007f9d8d3c9600(0000)
GS:ffff8f003fd00000(0000) knlGS:0000000000000000
May  4 09:17:19 igor01 kernel: [ 1193.227481] CS:  0010 DS: 0000 ES: 0000 CR0:
0000000080050033
May  4 09:17:19 igor01 kernel: [ 1193.227482] CR2: 00007f9d8d3e2000 CR3:
0000000233cac000 CR4: 00000000000406e0
May  4 09:17:19 igor01 kernel: [ 1193.227483] Call Trace:
May  4 09:17:19 igor01 kernel: [ 1193.227513] 
radeon_dp_get_dp_link_config+0x45/0x150 [radeon]
May  4 09:17:19 igor01 kernel: [ 1193.227542] 
radeon_dp_mode_valid_helper+0x4e/0xb0 [radeon]
May  4 09:17:19 igor01 kernel: [ 1193.227558]  ?
drm_mode_connector_list_update+0x113/0x180 [drm]
May  4 09:17:19 igor01 kernel: [ 1193.227581]  radeon_dp_mode_valid+0xcd/0xd0
[radeon]
May  4 09:17:19 igor01 kernel: [ 1193.227589] 
drm_helper_probe_single_connector_modes+0x418/0x710 [drm_kms_helper]
May  4 09:17:19 igor01 kernel: [ 1193.227607] 
drm_mode_getconnector+0x15d/0x340 [drm]
May  4 09:17:19 igor01 kernel: [ 1193.227610]  ? import_iovec+0x3a/0xe0
May  4 09:17:19 igor01 kernel: [ 1193.227627]  ?
drm_mode_connector_property_set_ioctl+0x60/0x60 [drm]
May  4 09:17:19 igor01 kernel: [ 1193.227641]  drm_ioctl_kernel+0x5f/0xb0 [drm]
May  4 09:17:19 igor01 kernel: [ 1193.227655]  drm_ioctl+0x31b/0x3d0 [drm]
May  4 09:17:19 igor01 kernel: [ 1193.227672]  ?
drm_mode_connector_property_set_ioctl+0x60/0x60 [drm]
May  4 09:17:19 igor01 kernel: [ 1193.227691]  radeon_drm_ioctl+0x4f/0x90
[radeon]
May  4 09:17:19 igor01 kernel: [ 1193.227694]  do_vfs_ioctl+0xa8/0x630
May  4 09:17:19 igor01 kernel: [ 1193.227696]  ? __sys_recvmsg+0x80/0x90
May  4 09:17:19 igor01 kernel: [ 1193.227699]  SyS_ioctl+0x79/0x90
May  4 09:17:19 igor01 kernel: [ 1193.227701]  ? SyS_clock_gettime+0x88/0xb0
May  4 09:17:19 igor01 kernel: [ 1193.227704]  do_syscall_64+0x73/0x130
May  4 09:17:19 igor01 kernel: [ 1193.227706] 
entry_SYSCALL_64_after_hwframe+0x3d/0xa2
May  4 09:17:19 igor01 kernel: [ 1193.227708] RIP: 0033:0x7f9d8a7c25d7
May  4 09:17:19 igor01 kernel: [ 1193.227709] RSP: 002b:00007fff59e6d978
EFLAGS: 00000246 ORIG_RAX: 0000000000000010
May  4 09:17:19 igor01 kernel: [ 1193.227712] RAX: ffffffffffffffda RBX:
0000559d87d158d0 RCX: 00007f9d8a7c25d7
May  4 09:17:19 igor01 kernel: [ 1193.227713] RDX: 00007fff59e6d9b0 RSI:
00000000c05064a7 RDI: 000000000000000c
May  4 09:17:19 igor01 kernel: [ 1193.227715] RBP: 00007fff59e6d9b0 R08:
0000000000000001 R09: 0000000000000000
May  4 09:17:19 igor01 kernel: [ 1193.227716] R10: 0000000000000000 R11:
0000000000000246 R12: 00000000c05064a7
May  4 09:17:19 igor01 kernel: [ 1193.227718] R13: 000000000000000c R14:
000000000000000c R15: 00007fff59e6d9b0
May  4 09:17:19 igor01 kernel: [ 1193.227719] Code: 3d 08 00 74 2d 40 80 ff 06
b8 d0 78 02 00 74 22 55 40 0f b6 f7 48 c7 c7 b8 0b 12 c0 48 89 e5 48 83 ec 08
89 45 fc e8 8f f0 77 c9 <0f> 0b 8b 45 fc c9 c3 f3 c3 66 0f 1f 44 00 00 66 66 66
66 90 55 
May  4 09:17:19 igor01 kernel: [ 1193.227764] ---[ end trace d2b3e21bce6f63f8
]---

Best, Florian

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