[Bug 93578] Intel HD 520 failed to train DP when connected with a external monitor

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Thu Apr 21 16:57:41 UTC 2016 

https://bugs.freedesktop.org/show_bug.cgi?id=93578

--- Comment #33 from lesiehnie at web.de ---
Using the latest kernel 4.5.2 with the Dell WD15 works now, but still an error
is displayed:

With Minidisplayport connected:
[  136.078236] ------------[ cut here ]------------
[  136.078253] WARNING: CPU: 1 PID: 757 at drivers/gpu/drm/i915/intel_pm.c:3553
skl_update_other_pipe_wm+0xb7/0xf3 [i915]()
[  136.078254] WARN_ON(!wm_changed)
[  136.078255] Modules linked in:
[  136.078256]  rfcomm snd_hda_codec_hdmi bnep cpufreq_conservative
cpufreq_userspace cpufreq_powersave cpufreq_stats dell_led
snd_hda_codec_realtek snd_hda_codec_generic snd_usb_audio snd_hwdep
snd_usbmidi_lib snd_rawmidi snd_seq_device btusb btrtl cdc_ether usbnet
uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 hid_multitouch
videodev videobuf2_core usbhid r8152 mii dell_wmi coretemp intel_rapl
x86_pkg_temp_thermal intel_powerclamp kvm_intel kvm irqbypass crct10dif_pclmul
crct10dif_common crc32_pclmul ghash_clmulni_intel hwmon aesni_intel dell_laptop
aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd serio_raw pcspkr
nls_utf8 nls_cp437 i2c_i801 vfat fat snd_hda_intel snd_hda_codec snd_hda_core
snd_pcm snd_timer snd soundcore brcmfmac brcmutil cfg80211
processor_thermal_device intel_lpss_pci
[  136.078283]  intel_soc_dts_iosf wmi battery i915 hci_uart btbcm btqca
btintel video bluetooth rfkill intel_lpss_acpi intel_lpss int3403_thermal
int340x_thermal_zone int3400_thermal intel_hid acpi_thermal_rel sparse_keymap
acpi_pad ac tpm_tis tpm processor evdev fbcon bitblit softcursor font button
i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm
intel_agp intel_gtt agpgart ipv6 rtsx_pci_sdmmc mmc_core crc32c_intel psmouse
rtsx_pci mfd_core xhci_pci xhci_hcd usbcore usb_common fan thermal i2c_hid hid
i2c_core rtc_cmos
[  136.078305] CPU: 1 PID: 757 Comm: Xorg Tainted: G        W       4.5.2 #206
[  136.078306] Hardware name: Dell Inc. XPS 13 9350/0VM5NC, BIOS 1.3.3
03/01/2016
[  136.078307]  0000000080000000 ffffffff8126c6eb ffff880465727a50
0000000000000009
[  136.078309]  ffffffff8103fb7b ffffffffa0456018 ffff88046a14a000
ffff880465727aa8
[  136.078310]  ffff88046a2b995c ffff88046a2b9960 ffffffff8103fbd3
ffffffffa04f2bf9
[  136.078312] Call Trace:
[  136.078316]  [<ffffffff8126c6eb>] ? dump_stack+0x46/0x59
[  136.078319]  [<ffffffff8103fb7b>] ? warn_slowpath_common+0x89/0x9e
[  136.078325]  [<ffffffffa0456018>] ? skl_update_other_pipe_wm+0xb7/0xf3
[i915]
[  136.078327]  [<ffffffff8103fbd3>] ? warn_slowpath_fmt+0x43/0x4b
[  136.078333]  [<ffffffffa0456018>] ? skl_update_other_pipe_wm+0xb7/0xf3
[i915]
[  136.078340]  [<ffffffffa0456160>] ? skl_update_wm+0x10c/0x4fd [i915]
[  136.078342]  [<ffffffff8142a226>] ? _raw_write_unlock_irqrestore+0xf/0x20
[  136.078351]  [<ffffffffa04bd320>] ?
intel_ddi_enable_transcoder_func+0x1af/0x1bb [i915]
[  136.078361]  [<ffffffffa04a576f>] ? haswell_crtc_enable+0x351/0x74c [i915]
[  136.078370]  [<ffffffffa04a2cd9>] ? intel_atomic_commit+0x604/0x1118 [i915]
[  136.078375]  [<ffffffffa01e9ce1>] ? drm_atomic_check_only+0x273/0x52a [drm]
[  136.078378]  [<ffffffffa023baf8>] ? drm_atomic_helper_set_config+0x45/0x8c
[drm_kms_helper]
[  136.078383]  [<ffffffffa01dcb23>] ? drm_mode_set_config_internal+0x50/0xd7
[drm]
[  136.078388]  [<ffffffffa01e0cd1>] ? drm_mode_setcrtc+0x3a0/0x410 [drm]
[  136.078392]  [<ffffffffa01d57fd>] ? drm_ioctl+0x225/0x353 [drm]
[  136.078397]  [<ffffffffa01e0931>] ? drm_mode_setplane+0x160/0x160 [drm]
[  136.078399]  [<ffffffff811002fc>] ? __vfs_write+0x96/0xbe
[  136.078401]  [<ffffffff8110e5a4>] ? vfs_ioctl+0x16/0x23
[  136.078403]  [<ffffffff8110eac2>] ? do_vfs_ioctl+0x49e/0x50e
[  136.078404]  [<ffffffff8105a6ad>] ? get_parent_ip+0x9/0x1b
[  136.078406]  [<ffffffff8104701d>] ? recalc_sigpending+0x11/0x3e
[  136.078407]  [<ffffffff81047895>] ? __set_task_blocked+0x5a/0x5e
[  136.078409]  [<ffffffff81116578>] ? __fget+0x6b/0x75
[  136.078411]  [<ffffffff8110eb6b>] ? SyS_ioctl+0x39/0x55
[  136.078412]  [<ffffffff8142a61b>] ? entry_SYSCALL_64_fastpath+0x16/0x6a
[  136.078413] ---[ end trace 38a5644275f8026b ]---

With HDMI connected:
[  369.128515] ------------[ cut here ]------------
[  369.128528] WARNING: CPU: 1 PID: 757 at drivers/gpu/drm/i915/intel_pm.c:3553
skl_update_other_pipe_wm+0xb7/0xf3 [i915]()
[  369.128529] WARN_ON(!wm_changed)
[  369.128529] Modules linked in:
[  369.128530]  af_packet rfcomm snd_hda_codec_hdmi bnep cpufreq_conservative
cpufreq_userspace cpufreq_powersave cpufreq_stats dell_led
snd_hda_codec_realtek snd_hda_codec_generic snd_usb_audio snd_hwdep
snd_usbmidi_lib snd_rawmidi snd_seq_device btusb btrtl cdc_ether usbnet
uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 hid_multitouch
videodev videobuf2_core usbhid r8152 mii dell_wmi coretemp intel_rapl
x86_pkg_temp_thermal intel_powerclamp kvm_intel kvm irqbypass crct10dif_pclmul
crct10dif_common crc32_pclmul ghash_clmulni_intel hwmon aesni_intel dell_laptop
aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd serio_raw pcspkr
nls_utf8 nls_cp437 i2c_i801 vfat fat snd_hda_intel snd_hda_codec snd_hda_core
snd_pcm snd_timer snd soundcore brcmfmac brcmutil cfg80211
processor_thermal_device
[  369.128558]  intel_lpss_pci intel_soc_dts_iosf wmi battery i915 hci_uart
btbcm btqca btintel video bluetooth rfkill intel_lpss_acpi intel_lpss
int3403_thermal int340x_thermal_zone int3400_thermal intel_hid acpi_thermal_rel
sparse_keymap acpi_pad ac tpm_tis tpm processor evdev fbcon bitblit softcursor
font button i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt
fb_sys_fops drm intel_agp intel_gtt agpgart ipv6 rtsx_pci_sdmmc mmc_core
crc32c_intel psmouse rtsx_pci mfd_core xhci_pci xhci_hcd usbcore usb_common fan
thermal i2c_hid hid i2c_core rtc_cmos
[  369.128596] CPU: 1 PID: 757 Comm: Xorg Tainted: G        W       4.5.2 #206
[  369.128597] Hardware name: Dell Inc. XPS 13 9350/0VM5NC, BIOS 1.3.3
03/01/2016
[  369.128598]  0000000080000000 ffffffff8126c6eb ffff880465727a50
0000000000000009
[  369.128599]  ffffffff8103fb7b ffffffffa0456018 ffff88046a14a000
ffff880465727aa8
[  369.128601]  ffff88046a2b995c ffff88046a2b9960 ffffffff8103fbd3
ffffffffa04f2bf9
[  369.128603] Call Trace:
[  369.128606]  [<ffffffff8126c6eb>] ? dump_stack+0x46/0x59
[  369.128609]  [<ffffffff8103fb7b>] ? warn_slowpath_common+0x89/0x9e
[  369.128616]  [<ffffffffa0456018>] ? skl_update_other_pipe_wm+0xb7/0xf3
[i915]
[  369.128617]  [<ffffffff8103fbd3>] ? warn_slowpath_fmt+0x43/0x4b
[  369.128624]  [<ffffffffa0456018>] ? skl_update_other_pipe_wm+0xb7/0xf3
[i915]
[  369.128631]  [<ffffffffa0456160>] ? skl_update_wm+0x10c/0x4fd [i915]
[  369.128633]  [<ffffffff8142a226>] ? _raw_write_unlock_irqrestore+0xf/0x20
[  369.128642]  [<ffffffffa04bd320>] ?
intel_ddi_enable_transcoder_func+0x1af/0x1bb [i915]
[  369.128652]  [<ffffffffa04a576f>] ? haswell_crtc_enable+0x351/0x74c [i915]
[  369.128662]  [<ffffffffa04a2cd9>] ? intel_atomic_commit+0x604/0x1118 [i915]
[  369.128667]  [<ffffffffa01e9ce1>] ? drm_atomic_check_only+0x273/0x52a [drm]
[  369.128670]  [<ffffffffa023baf8>] ? drm_atomic_helper_set_config+0x45/0x8c
[drm_kms_helper]
[  369.128675]  [<ffffffffa01dcb23>] ? drm_mode_set_config_internal+0x50/0xd7
[drm]
[  369.128681]  [<ffffffffa01e0cd1>] ? drm_mode_setcrtc+0x3a0/0x410 [drm]
[  369.128684]  [<ffffffffa01d57fd>] ? drm_ioctl+0x225/0x353 [drm]
[  369.128690]  [<ffffffffa01e0931>] ? drm_mode_setplane+0x160/0x160 [drm]
[  369.128692]  [<ffffffff811002fc>] ? __vfs_write+0x96/0xbe
[  369.128694]  [<ffffffff8110e5a4>] ? vfs_ioctl+0x16/0x23
[  369.128696]  [<ffffffff8110eac2>] ? do_vfs_ioctl+0x49e/0x50e
[  369.128697]  [<ffffffff8105a6ad>] ? get_parent_ip+0x9/0x1b
[  369.128699]  [<ffffffff8104701d>] ? recalc_sigpending+0x11/0x3e
[  369.128700]  [<ffffffff81047895>] ? __set_task_blocked+0x5a/0x5e
[  369.128702]  [<ffffffff81116578>] ? __fget+0x6b/0x75
[  369.128704]  [<ffffffff8110eb6b>] ? SyS_ioctl+0x39/0x55
[  369.128705]  [<ffffffff8142a61b>] ? entry_SYSCALL_64_fastpath+0x16/0x6a
[  369.128706] ---[ end trace 38a5644275f8026c ]---

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