Arch Linux

Oulipopo

Member

Registered: 2014-09-17

Posts: 11

[SOLVED] HDMI disappeared

After having had my external monitor disconnected last night, and coincidentally upgrading the system, the HDMI2 output is no longer showing, and my external monitor is all black. Output of xrandr below.

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     60.01*+  59.93    40.00  
   1680x1050     59.95    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)
HDMI1 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)

Yesterday this showed an HDMI2 output as well.

I have tried to degragede yesterdays upgraded packages.

lspci shows an entry for

00:02.0 VGA compatible controller: Intel Corporation UHD Graphics 620 (rev 07)

dmesg: https://pastebin.com/raw/wDpraKKQ

All help would be very much appreciated.

Edit
I seemed to have an old Xorg.0.log (https://pastebin.com/raw/NKv70CCg) lying around, with the newest being (https://pastebin.com/raw/c2FpTLvN).

Last edited by Oulipopo (2020-05-07 05:38:49)

Oulipopo

Member

Registered: 2014-09-17

Posts: 11

Re: [SOLVED] HDMI disappeared

In an attempt to start to clean up my system, I think I've now configured it such that I use "modesetting" graphics driver. This seems to have altered the names of my outputs, now xrandr gives the following:

Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 16384 x 16384
eDP-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 309mm x 173mm
   1920x1080     60.01*+  60.01    59.97    59.96    59.93    40.00  
   1680x1050     59.95    59.88  
   1400x1050     59.98  
...
   320x180       59.84    59.32  
DP-1 disconnected (normal left inverted right x axis y axis)
HDMI-1 disconnected (normal left inverted right x axis y axis)

Xorg.0.log (https://pastebin.com/raw/cVSEuAMj) seems a little cleaner now, but it still does not show anything regarding HDMI-2,

[  4501.286] (II) modeset(0): Output eDP-1 has no monitor section
[  4501.286] (II) modeset(0): Output DP-1 has no monitor section
[  4501.289] (II) modeset(0): Output HDMI-1 has no monitor section
...
[  4501.291] (II) modeset(0): EDID for output DP-1
[  4501.294] (II) modeset(0): EDID for output HDMI-1
[  4501.294] (II) modeset(0): Output eDP-1 connected
[  4501.294] (II) modeset(0): Output DP-1 disconnected
[  4501.294] (II) modeset(0): Output HDMI-1 disconnected

Last edited by Oulipopo (2020-05-05 10:37:50)

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,381

Re: [SOLVED] HDMI disappeared

Anything in dmesg? Maybe try downgrading the kernel a version, you might've hit a regression.

Oulipopo

Member

Registered: 2014-09-17

Posts: 11

Re: [SOLVED] HDMI disappeared

Anything in dmesg? Maybe try downgrading the kernel a version, you might've hit a regression.

dmesg --  https://pastebin.com/raw/wDpraKKQ

as far as I can tell there is nothing there to indicate that anything's wrong.

I did try to downgrade the kernel ... or at least I think I did, I ran

# pacman -U linux-5.6.8.arch1-1-x86_64.pkg.tar.xz

Note, I did see that the wiki told me to

downgrade at least linux, linux-headers and any kernel modules.

This is my revealing my ignorance, but is it possible that any kernel modules were upgraded that would not show running the following?

grep -i upgraded /var/log/pacman.log

Oulipopo

Member

Registered: 2014-09-17

Posts: 11

Re: [SOLVED] HDMI disappeared

In my latest dmesg (pastebin https://pastebin.com/raw/n235ZYST) this line

[    5.791641] pcieport 0000:02:00.0: can't change power state from D3cold to D0 (config space inaccessible)

has showed up before ... but could it still be regarding what is wrong?

seth

Member

From: Won't reply 2 private help req

Registered: 2012-09-03

Posts: 77,821

Re: [SOLVED] HDMI disappeared

i915 is on 0000:00:02.0, not 0000:02:00.0 - do you still have a journal from a "good" boot?

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Oulipopo

Member

Registered: 2014-09-17

Posts: 11

Re: [SOLVED] HDMI disappeared

i915 is on 0000:00:02.0, not 0000:02:00.0 - do you still have a journal from a "good" boot?

Ah ... I see.

Unfortunately, no, I only had the old Xorg.0.log because I think I started the x-server differently initially, so that was under /var/log, while I now get them under ~/.local/share/log ... I never thought to keep a dmesg log. (Should I?)

seth

Member

From: Won't reply 2 private help req

Registered: 2012-09-03

Posts: 77,821

Re: [SOLVED] HDMI disappeared

sudo journalctl -b -5 # system journal incl. dmesg from 5 boots ago

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Oulipopo

Member

Registered: 2014-09-17

Posts: 11

Re: [SOLVED] HDMI disappeared

Of course there's a journalctl option for that ... thank you!

Dmesg journal from a good boot, https://pastebin.com/raw/Qg9WvMmk.

Last edited by Oulipopo (2020-05-05 16:01:36)

seth

Member

From: Won't reply 2 private help req

Registered: 2012-09-03

Posts: 77,821

Re: [SOLVED] HDMI disappeared

So the old one has

Apr 28 05:29:34 archtop kernel: [drm] Finished loading DMC firmware i915/kbl_dmc_ver1_04.bin (v1.4)
Apr 28 05:29:34 archtop kernel: mei_hdcp 0000:00:16.0-b638ab7e-94e2-4ea2-a552-d1c54b627f04: bound 0000:00:02.0 (ops i915_hdcp_component_ops [i915])

While the new one has this flipped

[    3.688525] mei_hdcp 0000:00:16.0-b638ab7e-94e2-4ea2-a552-d1c54b627f04: bound 0000:00:02.0 (ops i915_hdcp_component_ops [i915])
[    3.690256] [drm] Finished loading DMC firmware i915/kbl_dmc_ver1_04.bin (v1.4)

Not sure how relevant that is because

Apr 28 05:29:34 archtop kernel: [drm] Initialized i915 1.6.0 20200114 for 0000:00:02.0 on minor 0

happens afterwards in any case.

You could
1. check other boots to see whether this flip is a pattern
2. try the LTS kernel
3. try early KMS (copy the i915 module into the initramfs), maybe you'll also have to copy the firmware to imapct this - https://wiki.archlinux.org/index.php/Ke … _KMS_start

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How to upload text · How to boot w/o GUI · Disable Windows Fast-Start! · Fix your xinitrc

Oulipopo

Member

Registered: 2014-09-17

Posts: 11

Re: [SOLVED] HDMI disappeared

...
2. try the LTS kernel

That did it!

dmesg from LTS boot: http://ix.io/2kZk

Do you have any suggestion as to where I should post a bug-report?

Edit: Okay ... now I am once again confused. I thougt I'd set LTS to my default boot by changing default in /boot/loader/loader.conf. However, rebooting it still chose the 5.6.10 kernel, but now with a fully functioning HDMI-2 output.

dmesg from current 5.6.10 boot: http://ix.io/2kZm

Do you have any idea what could have happened?

Last edited by Oulipopo (2020-05-06 10:09:56)