Bug 204363 - EDID from Acer P1266 rejected as invalid
Summary: EDID from Acer P1266 rejected as invalid
Status: NEW
Alias: None
Product: Drivers
Classification: Unclassified
Component: Video(DRI - non Intel) (show other bugs)
Hardware: All Linux
: P1 normal
Assignee: drivers_video-dri
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2019-07-29 13:56 UTC by Felix Hädicke
Modified: 2019-07-29 16:22 UTC (History)
1 user (show)

See Also:
Kernel Version: 5.2.4
Subsystem:
Regression: No
Bisected commit-id:

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Description Felix Hädicke 2019-07-29 13:56:34 UTC 
When plugging in an Acer P1266 via HDMI, I get the following error messages:

[   34.319344] amdgpu 0000:0e:00.0: HDMI-A-1: EDID is invalid:
[   34.319347] 	[00] BAD  00 ff ff ff ff ff ff 00 04 72 01 70 13 2f 00 00
[   34.319348] 	[00] BAD  27 12 01 03 80 00 00 78 0a fe 40 a4 57 59 8e 26
[   34.319348] 	[00] BAD  00 50 5d ff ff 80 81 00 81 80 81 40 90 40 a9 40
[   34.319349] 	[00] BAD  95 00 b3 00 81 c0 64 19 00 40 41 00 26 30 18 88
[   34.319349] 	[00] BAD  36 00 13 8e 21 00 00 18 00 00 00 fd 00 32 55 1e
[   34.319350] 	[00] BAD  64 11 00 0a 20 20 20 20 20 20 00 00 00 fc 00 41
[   34.319350] 	[00] BAD  43 45 52 20 50 31 32 36 36 0a 20 20 00 00 00 ff
[   34.319351] 	[00] BAD  00 4a 37 30 30 31 30 30 31 35 39 30 31 0a 01 90
[   34.319415] [drm:dc_link_detect [amdgpu]] *ERROR* No EDID read.

Tested with amdgpu / Radeon RX Vega 56 and i915 / Intel Iris 6100.
Comment 1 Adam Jackson 2019-07-29 16:22:24 UTC 
Yep, that's broken alright. The checksum (last byte) should be 0xa7 not 0x90. The block does look valid otherwise though.
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