Bug 32341 - nouveau only reads half the EDID.
Summary: nouveau only reads half the EDID.
Status: RESOLVED FIXED
Alias: None
Product: xorg
Classification: Unclassified
Component: Driver/nouveau (show other bugs)
Version: unspecified
Hardware: Other All
: medium normal
Assignee: Nouveau Project
QA Contact: Xorg Project Team
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2010-12-12 10:20 UTC by James
Modified: 2012-11-15 10:56 UTC (History)
0 users

See Also:
i915 platform:
i915 features:

Attachments
Make the server aware when the edid is larger than 128 bytes (1.09 KB, patch)
2012-11-04 18:05 UTC, Emil Velikov 		no flags Details | Splinter Review
View All

Description James 2010-12-12 10:20:56 UTC 
nv driver reads edid correctly.
nvidia driver reads edid correctly.
nouveau driver reads only half the EDID.

NV(0): EDID (in hex):
[    16.577] (II) NV(0):        00ffffffffffff003cad003700000000
[    16.577] (II) NV(0):        0a120103801009780a6837a454489a25
[    16.577] (II) NV(0):        0f4a4c3fef8001010101010101010101
[    16.578] (II) NV(0):        010101010101011d8018711c1620582c
[    16.578] (II) NV(0):        250010090000009e011d007251d01e20
[    16.578] (II) NV(0):        6e28550010090000001e000000fc0020
[    16.578] (II) NV(0):        33325f4c43445f54560a2020000000fd
[    16.578] (II) NV(0):        00313d0f2e08000a202020202020013f
[    16.578] (II) NV(0):        02032471500102048506111314150307
[    16.578] (II) NV(0):        12161f2010230907018301000066030c
[    16.578] (II) NV(0):        001000808c0ad08a20e02d10103e9600
[    16.578] (II) NV(0):        0403000000188c0aa01451f01600267c
[    16.578] (II) NV(0):        4300040300000099011d80d0721c1620
[    16.578] (II) NV(0):        102c258010090000009f011d00bc52d0
[    16.578] (II) NV(0):        1e20b828554010090000001e00000000
[    16.578] (II) NV(0):        000000000000000000000000000000f2


[   403.545] (II) NOUVEAU(0): EDID (in hex):
[   403.545] (II) NOUVEAU(0):   00ffffffffffff003cad003700000000
[   403.545] (II) NOUVEAU(0):   0a120103801009780a6837a454489a25
[   403.545] (II) NOUVEAU(0):   0f4a4c3fef8001010101010101010101
[   403.545] (II) NOUVEAU(0):   010101010101011d8018711c1620582c
[   403.545] (II) NOUVEAU(0):   250010090000009e011d007251d01e20
[   403.545] (II) NOUVEAU(0):   6e28550010090000001e000000fc0020
[   403.545] (II) NOUVEAU(0):   33325f4c43445f54560a2020000000fd
[   403.545] (II) NOUVEAU(0):   00313d0f2e08000a202020202020013f

[    24.423] (--) NVIDIA(0): Raw EDID bytes:
[    24.423] (--) NVIDIA(0):
[    24.423] (--) NVIDIA(0):   00 ff ff ff ff ff ff 00  3c ad 00 37 00 00 00 00
[    24.423] (--) NVIDIA(0):   0a 12 01 03 80 10 09 78  0a 68 37 a4 54 48 9a 25
[    24.423] (--) NVIDIA(0):   0f 4a 4c 3f ef 80 01 01  01 01 01 01 01 01 01 01
[    24.423] (--) NVIDIA(0):   01 01 01 01 01 01 01 1d  80 18 71 1c 16 20 58 2c
[    24.423] (--) NVIDIA(0):   25 00 10 09 00 00 00 9e  01 1d 00 72 51 d0 1e 20
[    24.423] (--) NVIDIA(0):   6e 28 55 00 10 09 00 00  00 1e 00 00 00 fc 00 20
[    24.423] (--) NVIDIA(0):   33 32 5f 4c 43 44 5f 54  56 0a 20 20 00 00 00 fd
[    24.423] (--) NVIDIA(0):   00 31 3d 0f 2e 08 00 0a  20 20 20 20 20 20 01 3f
[    24.423] (--) NVIDIA(0):   02 03 24 71 50 01 02 04  85 06 11 13 14 15 03 07
[    24.423] (--) NVIDIA(0):   12 16 1f 20 10 23 09 07  01 83 01 00 00 66 03 0c
[    24.423] (--) NVIDIA(0):   00 10 00 80 8c 0a d0 8a  20 e0 2d 10 10 3e 96 00
[    24.423] (--) NVIDIA(0):   04 03 00 00 00 18 8c 0a  a0 14 51 f0 16 00 26 7c
[    24.424] (--) NVIDIA(0):   43 00 04 03 00 00 00 99  01 1d 80 d0 72 1c 16 20
[    24.424] (--) NVIDIA(0):   10 2c 25 80 10 09 00 00  00 9f 01 1d 00 bc 52 d0
[    24.424] (--) NVIDIA(0):   1e 20 b8 28 55 40 10 09  00 00 00 1e 00 00 00 00
[    24.424] (--) NVIDIA(0):   00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 f2
Comment 1 Emil Velikov 2012-11-04 18:05:21 UTC 
Created attachment 69526 [details] [review]
Make the server aware when the edid is larger than 128 bytes

Ever since nouveau has done KMS only, it has been using the drm core to fetch the edid.

With the patch attached, xrandr & X print the complete edid rather than just the first block (the header)

Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.