Fedora 18 and DisplayLink


#1

Fedora 18 detects my ‘older’ DisplayLink device out of the box and the monitor works again :slight_smile:


#2

Hi Disi - That’s great news, thanks for letting us know!

Once the Fedora 18 Beta is released, we hope to take a bunch of screen shots and video and show what’s new. Most of the changes are coming from David Airlie’s new DRM driver work for USB attached displays.

Thanks again!
Bernie


#3

There you go :slight_smile:
!](https://d37wxxhohlp07s.cloudfront.net/s3_images/820490/37_inline.png?1353356914)](https://d37wxxhohlp07s.cloudfront.net/s3_images/820490/37.png?1353356914)


#4

Just to let you know that my display link is not working in fedora18 beta . Model is ws-ug17v2. Not certain of the chipset - thought it was a dl145 but not sure.

Below is dmesg with EDID which is all zeros removed

[27459.671068] usb 1-1: new high-speed USB device number 6 using ehci_hcd
[27459.789238] usb 1-1: New USB device found, idVendor=17e9, idProduct=0198
[27459.789246] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[27459.789252] usb 1-1: Product: WS Tech USB-DVI
[27459.789256] usb 1-1: Manufacturer: DisplayLink
[27459.789261] usb 1-1: SerialNumber: 511409
[27459.796499] [drm] vendor descriptor length:23 data:23 5f 01 0021 00 04 04 07 00 01
[27459.845087] usb 1-1: DVI-I-2: EDID invalid.
[27459.848643] fb2: udldrmfb frame buffer device
[27459.848661] [drm] Initialized udl 0.0.1 20120220 on minor 2
[27460.386508] usb 1-1: DVI-I-2: EDID invalid.
[27460.435213] Raw EDID:
[27460.435258] usb 1-1: DVI-I-2: EDID invalid.
[27460.570920] [drm] write mode info 153


#5

Hi Don, that’s not a Plugable product so we can’t help in detail, but it looks like there’s a problem reading the monitor’s EDID, which would explain it not working.

Without a valid EDID, the driver can’t know what mode to set.

The most common cause of an EDID problem is running a long VGA cable. If you have the option to switch to DVI or HDMI with that adapter and monitor, that often solves it. Hope that helps. Thanks!


#6

works fine with fedora 17 and same cable length.


#7