[Bug 110371] HP Dreamcolor display *Error* No EDID read

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=110371

--- Comment #11 from Babblebones at gmail.com ---
Created attachment 144277
  --> https://bugs.freedesktop.org/attachment.cgi?id=144277&action=edit
EDID file

Don't know if this helps but ALL kernels seem affected by not being able to
grab EDID on startup but the changes after 4.18 break something further as to
make the display unusable by changing the default behavior of the panel's mode
without EDID.

[    0.000000] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.18.20
root=/dev/sdb2 ro amdgpu.ppfeaturemask=0xffffffff amdgpu.dpm=1 amdgpu.dc=1
amdgpu.gpu_recovery=1 amdgpu.powerplay=1 drm.edid_firmware=eDP-1:edid/edid.bin
[    4.340989] [drm] Got external EDID base block and 0 extensions from
"edid/edid.bin" for connector "eDP-1"
[    4.451624]  drm_do_probe_ddc_edid+0xb9/0x130
[    4.451628]  ? drm_edid_block_valid+0x180/0x180
[    4.451629]  drm_do_get_edid+0xb1/0x330
[    4.451631]  drm_get_edid+0x61/0x380
[    4.451671]  dm_helpers_read_local_edid+0x4c/0xe0 [amdgpu]
[    4.630956]  drm_do_probe_ddc_edid+0xb9/0x130
[    4.630966]  ? drm_edid_block_valid+0x180/0x180
[    4.630969]  drm_do_get_edid+0xb1/0x330
[    4.630972]  drm_get_edid+0x61/0x380
[    4.631115]  dm_helpers_read_local_edid+0x4c/0xe0 [amdgpu]
[    4.801879]  drm_do_probe_ddc_edid+0xb9/0x130
[    4.801889]  ? drm_edid_block_valid+0x180/0x180
[    4.801892]  drm_do_get_edid+0xb1/0x330
[    4.801895]  drm_get_edid+0x61/0x380
[    4.802006]  dm_helpers_read_local_edid+0x4c/0xe0 [amdgpu]
[    4.972889]  drm_do_probe_ddc_edid+0xb9/0x130
[    4.972900]  ? drm_edid_block_valid+0x180/0x180
[    4.972903]  drm_do_get_edid+0xb1/0x330
[    4.972907]  drm_get_edid+0x61/0x380
[    4.973028]  dm_helpers_read_local_edid+0x4c/0xe0 [amdgpu]
[    5.145825]  drm_do_probe_ddc_edid+0xb9/0x130
[    5.145835]  ? drm_edid_block_valid+0x180/0x180
[    5.145837]  drm_do_get_edid+0xb1/0x330
[    5.145841]  drm_get_edid+0x61/0x380
[    5.145942]  dm_helpers_read_local_edid+0x4c/0xe0 [amdgpu]
[    5.170556] [drm:dc_link_detect [amdgpu]] *ERROR* No EDID read.

Is what happens when I set the edid manually from the kernel commandline.

Setting it manually freaks out newer kernels and my display won't modeset
properly making it a mess but on 4.18 it seemed to drop this.

Any debug patches I can run to help you guys figure it out?
I have included my EDID file if you want to run it through anything to see what
breaks.

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