Thanks for reply. Finally realized why I couldn't locate EDID folder,
kernel docs weren't installed.
Built default edids, copied 1920x1080.bin to /lib/firmware and
/lib/firmware/edid, adds
drm_kms_helper.edid_firmware=DVI-I-1:edid/1920x1080.bin drm_debug=14
log_buf_len=16M to commandline. No change in behavior, commandline
firmware helper ignored. Boot DVI-I-1 signal drops during and/or after
LUKS prompt. Next, invalid EDID message appears although
/usr/bin/edid-decode validates /lib/firmware/1920x1080.bin.
My guesstimation so far is (1) once DVI-I-1 signal drops during boot
nothing I've done so far 're-connects' DVI-I-1; (2) although
1920x1080.bin is placed in /lib/firmware and /lib/firmware/edid neither
is found yet there is no notification/complaint; (3) for whatever
reason, video:DVI-I-1:e is also ignored. Is there another commandline
option to keep signal on for DVI-I-1?
Thanks again
On 2014-07-01 15:41, poma wrote:
On 01.07.2014 18:50, flashl@xxxxxxxxxxxxxx wrote:
Current Kernel is 3.14.9-200 x86_64. This is a multihead setup; i915
and
NV96 video cards (displays HMDI2 = i915 and NV96 DVI-I-1 and VGA-2
[both
X233H Acer]). kernel bootmenu is presented from DVI-I-1, after kernel
selection, LUKS prompt appears on HMDI2 and DVI-I-1 is disconnected.
In
multi-user env HDMI2 and VGA-2 are active and dmesg shows edid
complaint
about DVI-I-1. /usr/bin/edid-decode complains about edid block for
both
NV96 displays DVI and VGA but for whatever reason DVI is only one
disconnected.
So far searches in various forum threads and bugzilla suggest buggy
DVI
edid problems been around for awhile. The DVI edid block error follows
DVI connector, meaning, moving DVI cable to monitor previously with
label VGA-2 will produce same edid message. I haven't found complete
instructions to build CustomEdid yet, that seems the way to go since
commandline settings like drm_edid_strict, video=DVI-I-1:e are
ignored.
Pointers to documentation to build customedid or kernel commandline to
disable DVI edid checking will be greatly appreciated.
Thanks in advance.
https://www.kernel.org/doc/Documentation/kernel-parameters.txt
drm_kms_helper.edid_firmware=[<connector>:]<file>
Broken monitors, graphic adapters and KVMs may
send no or incorrect EDID data sets. This parameter
allows to specify an EDID data set in the
/lib/firmware directory that is used instead.
Generic built-in EDID data sets are used, if one of
edid/1024x768.bin, edid/1280x1024.bin,
edid/1680x1050.bin, or edid/1920x1080.bin is given
and no file with the same name exists. Details and
instructions how to build your own EDID data are
available in Documentation/EDID/HOWTO.txt. An EDID
data set will only be used for a particular connector,
if its name and a colon are prepended to the EDID
name.
https://www.kernel.org/doc/Documentation/EDID/HOWTO.txt
poma
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