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wwwael

Member

Registered: 2021-05-05

Posts: 21

[SOLVED] no hdmi out (Failed to probe LSPCON)

i found this issue to be similar to
https://forum.manjaro.org/t/no-hdmi-out … ptop/45121
but nothing really changed anything.

dmesg:

[    3.017833] [drm:lspcon_init [i915]] *ERROR* Failed to probe lspcon
[    3.942836] [drm:lspcon_init [i915]] *ERROR* Failed to probe lspcon
[    4.867853] [drm:lspcon_init [i915]] *ERROR* Failed to probe lspcon
[ 1578.998714] [drm:lspcon_init [i915]] *ERROR* Failed to probe lspcon
[ 1578.998782] [drm:intel_dp_detect [i915]] *ERROR* LSPCON init failed on port B
[ 1582.259980] [drm:lspcon_init [i915]] *ERROR* Failed to probe lspcon
[ 1582.260048] [drm:intel_dp_detect [i915]] *ERROR* LSPCON init failed on port B

i also noticed that this is similar to another issue, but that wasn't doing me good
LSPCON doesn't work in ANY situations.

journalctl:

May 24 12:03:28 yorat kernel: drm_dp_i2c_do_msg: 14 callbacks suppressed
May 24 12:03:29 yorat kernel: [drm:lspcon_init [i915]] *ERROR* Failed to probe lspcon
May 24 12:03:29 yorat kernel: [drm:intel_dp_detect [i915]] *ERROR* LSPCON init failed on port B
May 24 12:03:32 yorat kernel: [drm:lspcon_init [i915]] *ERROR* Failed to probe lspcon
May 24 12:03:32 yorat kernel: [drm:intel_dp_detect [i915]] *ERROR* LSPCON init failed on port B

maybe me trying to fix it through kernel parameters isn't doing me much, as lspcon in the beginning isn't even being probed at all,

Last edited by wwwael (2021-06-05 23:19:59)

wwwael

Member

Registered: 2021-05-05

Posts: 21

Re: [SOLVED] no hdmi out (Failed to probe LSPCON)

am i allowed to bump?

ewaller

Administrator

From: Pasadena, CA

Registered: 2009-07-13

Posts: 19,772

Re: [SOLVED] no hdmi out (Failed to probe LSPCON)

am i allowed to bump?

No.

But...   We invite you to tell us more.  These are active forums, so silence is a sure sign there is not enough information.  Tell us what you have tried since your first post.  Or tell us what you have read or learned about the problem.  Where you have tried to find information.

Also, You did not describe your question.  You referred us to another page on another site.   I, for one, will not follow such links.   Tell us the problem in your own words.

Tell us -- specifically -- what commands you ran to cause those messages to appear in the logs.

Last edited by ewaller (2021-06-05 16:49:21)

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loqs

Member

Registered: 2014-03-06

Posts: 17,321

Re: [SOLVED] no hdmi out (Failed to probe LSPCON)

Please also post the full output of dmesg and list what kernel versions you have tried that show the issue.
Edit:
Please also list what displays are connected along with the connection type each is using.

Last edited by loqs (2021-06-05 17:02:24)

wwwael

Member

Registered: 2021-05-05

Posts: 21

Re: [SOLVED] no hdmi out (Failed to probe LSPCON)

this issue is ongoing (fixed by using linux-drm-tip-git) with https://gitlab.freedesktop.org/drm/intel/-/issues/2875, but i will still give information as with linux 5.13 this might be fixed.

# uname -r -v
5.12.9-arch1-1  

# dmesg | grep i915
[    2.064444] i915 0000:00:02.0: vgaarb: deactivate vga console
[    2.065879] i915 0000:00:02.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=io+mem:owns=io+mem
[    2.066341] i915 0000:00:02.0: [drm] Finished loading DMC firmware i915/tgl_dmc_ver2_08.bin (v2.8)
[    3.009406] [drm:lspcon_init [i915]] *ERROR* Failed to probe lspcon
[    3.933530] [drm:lspcon_init [i915]] *ERROR* Failed to probe lspcon
[    4.857674] [drm:lspcon_init [i915]] *ERROR* Failed to probe lspcon
[    4.857793] [drm] Initialized i915 1.6.0 20201103 for 0000:00:02.0 on minor 0
[    4.861379] fbcon: i915drmfb (fb0) is primary device
[    4.893070] i915 0000:00:02.0: [drm] fb0: i915drmfb frame buffer device
[   18.349437] mei_hdcp 0000:00:16.0-b638ab7e-94e2-4ea2-a552-d1c54b627f04: bound 0000:00:02.0 (ops i915_hdcp_component_ops [i915])
[   18.362508] sof-audio-pci-intel-tgl 0000:00:1f.3: bound 0000:00:02.0 (ops i915_audio_component_bind_ops [i915])

these will pop up after i plug in the hdmi

[   99.136043] [drm:lspcon_init [i915]] *ERROR* Failed to probe lspcon
[   99.137931] [drm:intel_dp_detect [i915]] *ERROR* LSPCON init failed on port B 
[  102.406780] [drm:lspcon_init [i915]] *ERROR* Failed to probe lspcon                        
[  102.408716] [drm:intel_dp_detect [i915]] *ERROR* LSPCON init failed on port B  

another thing is i have a seperate issue, but thats onhold because its fixed by blacklisting elan_i2c

# xrandr
Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 32767 x 32767
eDP1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 310mm x 170mm
   1920x1080     60.00*+  59.93
   1680x1050     59.88
   1400x1050     59.98
   1600x900      60.00    59.95    59.82
   1280x1024     60.02
   1400x900      59.96    59.88
   1280x960      60.00
   1368x768      60.00    59.88    59.85
   1280x800      59.81    59.91
   1280x720      59.86    60.00    59.74
   1024x768      60.00
   1024x576      60.00    59.90    59.82
   960x540       60.00    59.63    59.82
   800x600       60.32    56.25
   864x486       60.00    59.92    59.57
   640x480       59.94
   720x405       59.51    60.00    58.99
   640x360       59.84    59.32    60.00
DP1 disconnected (normal left inverted right x axis y axis)
DP2 disconnected (normal left inverted right x axis y axis)
DP3 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)

^^ while the hdmi is plugged in

loqs

Member

Registered: 2014-03-06

Posts: 17,321

Re: [SOLVED] no hdmi out (Failed to probe LSPCON)

If it is fixed by https://git.kernel.org/pub/scm/linux/ke … 6881110890 that is in 5.13-rc1+
You can check using linux-mainline from Unofficial_user_repositories#miffe or building the package from AUR.

wwwael

Member

Registered: 2021-05-05

Posts: 21

Re: [SOLVED] no hdmi out (Failed to probe LSPCON)

yes, its fixed in 5.13.0-rc4-1-mainline, video, sound works and everything
thank you for letting me know of this, another question is that will this fix be pushed into stable linux 5.13?
if the answer above is correct, i will just mark this as solved.

Last edited by wwwael (2021-06-05 23:13:22)

loqs

Member

Registered: 2014-03-06

Posts: 17,321

Re: [SOLVED] no hdmi out (Failed to probe LSPCON)

rc-4 is the abbreviation for release candidate four.  Everything from this release candidate will be in 5.13 plus additional fixes.  Unless a fix added between rc-4 and release breaks this fix it should work in 5.13.
5.13 mainline will be the base for the 5.13.Y stable series which again will contain additional fixes back ported from mainline.  So hopefully all being well the first stable release containing the fix would be 5.13.1.

Last edited by loqs (2021-06-05 23:18:04)

wwwael

Member

Registered: 2021-05-05

Posts: 21

Re: [SOLVED] no hdmi out (Failed to probe LSPCON)

alright thanks, will be marking this as solved (im guessing i should just change the title to [SOLVED]

loqs

Member

Registered: 2014-03-06

Posts: 17,321

Re: [SOLVED] no hdmi out (Failed to probe LSPCON)

Yes edit the first post and prepend [SOLVED] to the title.  If it is too long you might have to shorten is a bit.

nik_gr

Member

Registered: 2021-08-29

Posts: 2

Re: [SOLVED] no hdmi out (Failed to probe LSPCON)

For me this issue has actually _appeared_ recently, about 1-2 weeks ago, not more. After the kernel upgrade.

Running 5.14.6-arch1-1 now, everything up to date. On Lenovo T15g Gen1 laptop, with integrated Intel card + Nvidia prime. Not connected to the external monitor. The following messages pop up on the console every time the machine wakes up:

[10118.013359] [drm:lspcon_init [i915]] *ERROR* Failed to probe lspcon
[10118.013435] [drm:intel_dp_detect [i915]] *ERROR* LSPCON init failed on port D
[10119.277861] [drm:lspcon_init [i915]] *ERROR* Failed to probe lspcon
[10119.278073] [drm:intel_dp_detect [i915]] *ERROR* LSPCON init failed on port D
[10120.593332] [drm:lspcon_init [i915]] *ERROR* Failed to probe lspcon
[10120.593414] [drm:intel_dp_detect [i915]] *ERROR* LSPCON init failed on port D

nik_gr

Member

Registered: 2021-08-29

Posts: 2

Re: [SOLVED] no hdmi out (Failed to probe LSPCON)

...and the problem is gone with 5.14.7