Comment 6 for bug 1846335

You-Sheng Yang (vicamo) wrote :

It seems for linux-oem 4.15, there will be error messages in regard to i915. Since there are still some changes, e.g. bug 1848491, waiting to be SRU-ed to 4.15 and it seems 4.15 backport is not so urgent right now, I'll not try to include more fix for this task for linux-oem 4.15.

  [drm:wait_panel_status [i915]] *ERROR* PPS state mismatch
  ------------[ cut here ]------------
  eDP powered off while attempting aux channel communication.
  WARNING: CPU: 9 PID: 462 at /build/linux-oem-0v3Pg9/linux-oem-4.15.0/drivers/gpu/drm/i915/intel_dp.c:933 intel_dp_aux_ch+0x3fc/0x660 [i915]
  Modules linked in: dell_wmi dell_smbios nouveau dell_wmi_descriptor intel_wmi_thunderbolt wmi_bmof mxm_wmi snd_hda_intel(+) snd_hda_codec intel_rapl x86_pkg_temp_thermal snd_hda_core intel_powerclamp coretemp snd_hwdep arc4 snd_pcm kvm_intel kvm joydev irqbypass snd_seq_midi crct10dif_pclmul snd_seq_midi_event crc32_pclmul ghash_clmulni_intel pcbc snd_rawmidi aesni_intel iwlmvm(OE) aes_x86_64 crypto_simd glue_helper cryptd mac80211(OE) snd_seq intel_cstate i915(+) dcdbas dell_smm_hwmon snd_seq_device snd_timer uvcvideo btusb videobuf2_vmalloc input_leds iwlwifi(OE) btrtl videobuf2_memops btbcm ttm videobuf2_v4l2 btintel serio_raw videobuf2_core intel_rapl_perf snd bluetooth videodev 8250_dw drm_kms_helper rtsx_pci_ms media memstick soundcore drm cfg80211(OE) hid_multitouch ecdh_generic
   i2c_algo_bit ucsi_acpi fb_sys_fops idma64 syscopyarea processor_thermal_device sysfillrect virt_dma typec_ucsi intel_soc_dts_iosf compat(OE) sysimgblt mac_hid wmi typec int3403_thermal int340x_thermal_zone video intel_hid int3400_thermal acpi_thermal_rel sparse_keymap acpi_pad sch_fq_codel parport_pc ppdev lp parport ip_tables x_tables autofs4 rtsx_pci_sdmmc intel_lpss_pci psmouse i2c_i801 rtsx_pci thunderbolt intel_lpss i2c_hid hid
  CPU: 9 PID: 462 Comm: systemd-udevd Tainted: G OE 4.15.0-1060-oem #69-Ubuntu
  Hardware name: Dell Inc. Precision 5550/, BIOS 0.3.0 10/08/2019
  RIP: 0010:intel_dp_aux_ch+0x3fc/0x660 [i915]
  RSP: 0000:ffffbc5fc19776c8 EFLAGS: 00010286
  RAX: 0000000000000000 RBX: ffff91103c248000 RCX: 0000000000000006
  RDX: 0000000000000007 RSI: 0000000000000096 RDI: ffff911044056490
  RBP: ffffbc5fc1977768 R08: 0000000000000451 R09: 0000000000000004
  R10: ffffbc5fc1977508 R11: 0000000000000001 R12: ffff91103f50d100
  R13: 0000000000000004 R14: ffff91103f50d100 R15: ffff91103c248000
  FS: 00007f9ba90968c0(0000) GS:ffff911044040000(0000) knlGS:0000000000000000
  CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  CR2: 0000557926f77290 CR3: 0000000275fc2005 CR4: 00000000003606e0
  DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
  DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
  Call Trace:
   ? vsnprintf+0x226/0x510
   intel_dp_aux_transfer+0xac/0x240 [i915]
   ? fwtable_read32+0x8d/0x1d0 [i915]
   ? fwtable_write32+0xf7/0x240 [i915]
   drm_dp_dpcd_access+0x75/0x120 [drm_kms_helper]
   drm_dp_dpcd_read+0x31/0x70 [drm_kms_helper]
   intel_dp_read_dpcd+0x29/0x60 [i915]
   intel_dp_init_connector+0x9cd/0x1320 [i915]
   intel_ddi_init+0x336/0x480 [i915]
   intel_setup_outputs+0x15b/0x990 [i915]
   intel_modeset_init+0x57a/0x1010 [i915]
   ? intel_i2c_reset+0x4e/0x60 [i915]
   ? intel_setup_gmbus+0x2ac/0x2c0 [i915]
   i915_driver_load+0xa73/0x1270 [i915]
   ? _cond_resched+0x19/0x40
   i915_pci_probe+0x42/0x70 [i915]
   ? driver_probe_device+0x490/0x490
   ? 0xffffffffc0a8c000
   ? 0xffffffffc0a8c000
   i915_init+0x5c/0x5f [i915]
   ? __vunmap+0x8e/0xc0
   ? _cond_resched+0x19/0x40
   ? kmem_cache_alloc_trace+0x14e/0x1b0
   ? do_init_module+0x27/0x213
   ? ima_post_read_file+0x96/0xa0
   ? SYSC_finit_module+0xfc/0x120
  RIP: 0033:0x7f9ba93232e9
  RSP: 002b:00007ffc6305a568 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
  RAX: ffffffffffffffda RBX: 000056048fc99490 RCX: 00007f9ba93232e9
  RDX: 0000000000000000 RSI: 00007f9ba9204cad RDI: 0000000000000015
  RBP: 00007f9ba9204cad R08: 0000000000000000 R09: 000056048fc99490
  R10: 0000000000000015 R11: 0000000000000246 R12: 0000000000000000
  R13: 000056048fc91e40 R14: 0000000000020000 R15: 000056048fc99490
  Code: ff ff e8 e8 dd ff ff 84 c0 0f 85 b8 fc ff ff 4c 89 f7 e8 68 de ff ff 84 c0 0f 85 a8 fc ff ff 48 c7 c7 a0 54 a3 c0 e8 e4 c5 cd c7 <0f> 0b 49 8b be 00 ff ff ff 48 8d 55 a8 4c 89 f6 4c 8b a3 18 07
  ---[ end trace cb6acee37c46ac83 ]---