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<base href="https://bugs.freedesktop.org/">
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [CFL] Screen goes blank right after boot."
href="https://bugs.freedesktop.org/show_bug.cgi?id=104139">104139</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[CFL] Screen goes blank right after boot.
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>kai.heng.feng@canonical.com
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
<p>
<div>
<pre>Kernel: drm/drm-intel drm-intel-next-queued branch
Firmware: drm/drm-firmware master branch
Once the i915 is loaded, the screen goes full blank.
I can see the trace from i915:
[ 7.206826] WARN_ON(!intel_gmbus_is_valid_pin(dev_priv, pin))
[ 7.206837] ------------[ cut here ]------------
[ 7.206860] WARNING: CPU: 3 PID: 305 at drivers/gpu/drm/i915/intel_i2c.c:741
intel_gmbus_get_adapter+0x43/0x50 [i915]
[ 7.206861] Modules linked in: hid_multitouch dell_wmi wmi_bmof mxm_wmi
nls_iso8859_1 intel_rapl dell_laptop x86_pkg_temp_thermal dell_smbios
intel_powerclamp dcdbas coretemp i915 kvm_intel kvm snd_hda_intel snd_hda_codec
irqbypass crct10dif_pclmul snd_hwdep crc32_pclmul snd_hda_core
ghash_clmulni_intel pcbc aesni_intel snd_pcm aes_x86_64 crypto_simd cryptd
glue_helper intel_cstate snd_seq intel_rapl_perf snd_timer i2c_algo_bit
snd_seq_device joydev drm_kms_helper input_leds snd serio_raw soundcore
syscopyarea sysfillrect idma64 sysimgblt fb_sys_fops virt_dma drm
intel_lpss_pci intel_lpss shpchp processor_thermal_device intel_soc_dts_iosf
int3403_thermal int340x_thermal_zone wmi intel_hid int3400_thermal mac_hid
sparse_keymap acpi_thermal_rel acpi_pad parport_pc ppdev lp parport autofs4
btrfs xor
[ 7.206885] zstd_compress raid6_pq dm_mirror dm_region_hash dm_log psmouse
alx ahci mdio libahci i2c_hid video hid pinctrl_cannonlake pinctrl_intel
[ 7.206892] CPU: 3 PID: 305 Comm: kworker/u24:4 Not tainted 4.14.0-rc7+ #1
[ 7.206892] Hardware name: Dell Inc. G7 7587/ , BIOS 0.2.1 11/15/2017
[ 7.206895] Workqueue: events_unbound async_run_entry_fn
[ 7.206896] task: ffff9d55d94e2f00 task.stack: ffffad6ec3acc000
[ 7.206918] RIP: 0010:intel_gmbus_get_adapter+0x43/0x50 [i915]
[ 7.206918] RSP: 0018:ffffad6ec3acfb90 EFLAGS: 00010286
[ 7.206919] RAX: 0000000000000031 RBX: 0000000000000006 RCX:
ffffffffbb85fd48
[ 7.206920] RDX: 0000000000000000 RSI: 0000000000000096 RDI:
0000000000000202
[ 7.206920] RBP: ffffad6ec3acfba0 R08: 0000000000000031 R09:
00000000000004a9
[ 7.206921] R10: ffffad6ec3acfbd0 R11: 0000000000000031 R12:
ffff9d55ccfe0000
[ 7.206921] R13: ffff9d55ccfe0000 R14: ffff9d55cd4bf000 R15:
ffffffffc1053e00
[ 7.206922] FS: 0000000000000000(0000) GS:ffff9d55ddac0000(0000)
knlGS:0000000000000000
[ 7.206923] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 7.206923] CR2: 00007fa638d56624 CR3: 0000000491409003 CR4:
00000000003606e0
[ 7.206924] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[ 7.206925] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
[ 7.206925] Call Trace:
[ 7.206947] intel_hdmi_set_edid+0x3f/0x1c0 [i915]
[ 7.206966] intel_hdmi_detect+0x8d/0xb0 [i915]
[ 7.206970] drm_helper_probe_detect+0x75/0xa0 [drm_kms_helper]
[ 7.206973] drm_helper_probe_single_connector_modes+0xee/0x730
[drm_kms_helper]
[ 7.206977] drm_setup_crtcs+0x139/0x9e0 [drm_kms_helper]
[ 7.206981] __drm_fb_helper_initial_config_and_unlock+0x3f/0x3b0
[drm_kms_helper]
[ 7.206983] ? __switch_to+0x1f3/0x4d0
[ 7.206986] drm_fb_helper_initial_config+0x35/0x40 [drm_kms_helper]
[ 7.207009] intel_fbdev_initial_config+0x18/0x30 [i915]
[ 7.207011] async_run_entry_fn+0x36/0x150
[ 7.207013] process_one_work+0x156/0x3f0
[ 7.207014] worker_thread+0x4b/0x460
[ 7.207015] kthread+0x109/0x140
[ 7.207016] ? process_one_work+0x3f0/0x3f0
[ 7.207017] ? kthread_create_on_node+0x70/0x70
[ 7.207019] ret_from_fork+0x25/0x30
[ 7.207020] Code: 84 c0 74 14 48 69 db 48 04 00 00 49 8d 84 1c a8 0b 00 00
5b 41 5c 5d c3 48 c7 c6 08 27 07 c1 48 c7 c7 36 38 08 c1 e8 de c3 ad f9 <0f> ff
31 c0 5b 41 5c 5d c3 0f 1f 40 00 0f 1f 44 00 00 8b 87 f4
[ 7.207039] ---[ end trace 694c65d4d242db88 ]---
[ 7.207041] BUG: unable to handle kernel NULL pointer dereference at
0000000000000010
[ 7.207047] IP: i2c_transfer+0xe/0xc0
[ 7.207048] PGD 0 P4D 0
[ 7.207050] Oops: 0000 [#1] SMP
[ 7.207051] Modules linked in: hid_multitouch dell_wmi wmi_bmof mxm_wmi
nls_iso8859_1 intel_rapl dell_laptop x86_pkg_temp_thermal dell_smbios
intel_powerclamp dcdbas coretemp i915 kvm_intel kvm snd_hda_intel snd_hda_codec
irqbypass crct10dif_pclmul snd_hwdep crc32_pclmul snd_hda_core
ghash_clmulni_intel pcbc aesni_intel snd_pcm aes_x86_64 crypto_simd cryptd
glue_helper intel_cstate snd_seq intel_rapl_perf snd_timer i2c_algo_bit
snd_seq_device joydev drm_kms_helper input_leds snd serio_raw soundcore
syscopyarea sysfillrect idma64 sysimgblt fb_sys_fops virt_dma drm
intel_lpss_pci intel_lpss shpchp processor_thermal_device intel_soc_dts_iosf
int3403_thermal int340x_thermal_zone wmi intel_hid int3400_thermal mac_hid
sparse_keymap acpi_thermal_rel acpi_pad parport_pc ppdev lp parport autofs4
btrfs xor
[ 7.207078] zstd_compress raid6_pq dm_mirror dm_region_hash dm_log psmouse
alx ahci mdio libahci i2c_hid video hid pinctrl_cannonlake pinctrl_intel
[ 7.207084] CPU: 3 PID: 305 Comm: kworker/u24:4 Tainted: G W
4.14.0-rc7+ #1
[ 7.207086] Hardware name: Dell Inc. G7 7587/ , BIOS 0.2.1 11/15/2017
[ 7.207089] Workqueue: events_unbound async_run_entry_fn
[ 7.207090] task: ffff9d55d94e2f00 task.stack: ffffad6ec3acc000
[ 7.207093] RIP: 0010:i2c_transfer+0xe/0xc0
[ 7.207094] RSP: 0018:ffffad6ec3acfa78 EFLAGS: 00010246
[ 7.207096] RAX: 0000000000000001 RBX: 0000000000000005 RCX:
0000000000000001
[ 7.207097] RDX: 0000000000000002 RSI: ffffad6ec3acfad0 RDI:
0000000000000000
[ 7.207099] RBP: ffffad6ec3acfa90 R08: 0000000000000001 R09:
0000000000000050
[ 7.207100] R10: 0000000000000001 R11: 0000000000000031 R12:
0000000000000002
[ 7.207102] R13: ffffad6ec3acfabe R14: ffffad6ec3acfabf R15:
ffffad6ec3acfb6f
[ 7.207103] FS: 0000000000000000(0000) GS:ffff9d55ddac0000(0000)
knlGS:0000000000000000
[ 7.207105] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 7.207107] CR2: 0000000000000010 CR3: 0000000491409003 CR4:
00000000003606e0
[ 7.207108] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[ 7.207110] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
[ 7.207111] Call Trace:
[ 7.207121] drm_do_probe_ddc_edid+0xed/0x160 [drm]
[ 7.207129] drm_get_edid+0xe9/0x3d0 [drm]
[ 7.207137] ? drm_get_edid+0xe9/0x3d0 [drm]
[ 7.207161] ? intel_gmbus_get_adapter+0x45/0x50 [i915]
[ 7.207183] intel_hdmi_set_edid+0x4a/0x1c0 [i915]
[ 7.207204] intel_hdmi_detect+0x8d/0xb0 [i915]
[ 7.207209] drm_helper_probe_detect+0x75/0xa0 [drm_kms_helper]
[ 7.207213] drm_helper_probe_single_connector_modes+0xee/0x730
[drm_kms_helper]
[ 7.207218] drm_setup_crtcs+0x139/0x9e0 [drm_kms_helper]
[ 7.207222] __drm_fb_helper_initial_config_and_unlock+0x3f/0x3b0
[drm_kms_helper]
[ 7.207225] ? __switch_to+0x1f3/0x4d0
[ 7.207229] drm_fb_helper_initial_config+0x35/0x40 [drm_kms_helper]
[ 7.207253] intel_fbdev_initial_config+0x18/0x30 [i915]
[ 7.207255] async_run_entry_fn+0x36/0x150
[ 7.207258] process_one_work+0x156/0x3f0
[ 7.207260] worker_thread+0x4b/0x460
[ 7.207262] kthread+0x109/0x140
[ 7.207263] ? process_one_work+0x3f0/0x3f0
[ 7.207265] ? kthread_create_on_node+0x70/0x70
[ 7.207267] ret_from_fork+0x25/0x30
[ 7.207269] Code: fb ff ff 89 c2 eb d8 45 31 ff e9 f9 fc ff ff 0f 1f 40 00
66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 41 55 41 54 53 <48> 8b
47 10 48 89 fb 48 83 38 00 74 6a 65 8b 05 5e 66 ea 44 a9
[ 7.207291] RIP: i2c_transfer+0xe/0xc0 RSP: ffffad6ec3acfa78
[ 7.207292] CR2: 0000000000000010
[ 7.207294] ---[ end trace 694c65d4d242db89 ]---</pre>
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