[Dri-users] 3 monitor weirdness, last with bad EDID, radeon card.

[Jim Cromie]

I picked up a cheap LED flatscreen last month,
and plugged it onto the VGA of my radeon.

It has a bad EDID, as reported by both 3.13-rc3+ and
FC-19-current,recent,etc.

The bad EDID apparently caused semi-random failures to pick a good
resolution,
and affected not only the new screen, but also the ACER, connected to the
DVI-D connector.

I recently added to the boot:
  drm_kms_helper.edid_firmware=VGA-1:edid/1920x1080.bin

the 1st/only boot afterwards went perfect.  So thats apparently solved.



Q:  in the following, I expected to read 3 different EDID's from the 3
monitors.
I appear to always read the ACER X241W screen.


$ for p in /sys/class/drm/card0*/edid; do echo; echo $p; monitor-edid $p ;
done

/sys/class/drm/card0-DVI-D-1/edid
Name: X241W
EISA ID: ACRad99
EDID version: 1.3
EDID extension blocks: 0
Screen size: 51.8 cm x 32.4 cm (24.05 inches, aspect ratio 16/10 = 1.60)
Gamma: 2.2
Digital signal
Max video bandwidth: 170 MHz

 HorizSync 31-81
VertRefresh 56-75

# Monitor preferred modeline (60.0 Hz vsync, 74.0 kHz hsync, ratio 16/10,
94 dpi)
 ModeLine "1920x1200" 154 1920 1968 2000 2080 1200 1203 1209 1235 +hsync
+vsync

/sys/class/drm/card0-HDMI-A-1/edid
Name: X241W
EISA ID: ACRad99
EDID version: 1.3
EDID extension blocks: 0
Screen size: 51.8 cm x 32.4 cm (24.05 inches, aspect ratio 16/10 = 1.60)
Gamma: 2.2
Digital signal
Max video bandwidth: 170 MHz

HorizSync 31-81
VertRefresh 56-75

# Monitor preferred modeline (60.0 Hz vsync, 74.0 kHz hsync, ratio 16/10,
94 dpi)
 ModeLine "1920x1200" 154 1920 1968 2000 2080 1200 1203 1209 1235 +hsync
+vsync

/sys/class/drm/card0-VGA-1/edid
Name: X241W
EISA ID: ACRad99
EDID version: 1.3
EDID extension blocks: 0
Screen size: 51.8 cm x 32.4 cm (24.05 inches, aspect ratio 16/10 = 1.60)
Gamma: 2.2
Digital signal
Max video bandwidth: 170 MHz

HorizSync 31-81
VertRefresh 56-75

# Monitor preferred modeline (60.0 Hz vsync, 74.0 kHz hsync, ratio 16/10,
94 dpi)
 ModeLine "1920x1200" 154 1920 1968 2000 2080 1200 1203 1209 1235 +hsync
+vsync




hmm,

Ive pretty much convinced myself that this is bug-report-worthy.

comments, suggestions ?
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