DisplayLink

[Rabie]

Hi There,

is there any driver Extension for the displaylink vga to usb Adapter ?

Something like this: https://www.otto.de/p/i-tec-display-adapter-usb-vga-advance-computer-kabel-C1263118070/#variationId=1263118093

Thank you

[Juanito]

Which architecture and which version?

If I understand correctly, the oem should supply a linux driver?

Edit: If it is a usb2 device, it apparently uses the udl kernel driver already present.

[Rabie]

Which architecture and which version?

If I understand correctly, the oem should supply a linux driver?

Edit: If it is a usb2 device, it apparently uses the udl kernel driver already present.

piCore V13.x/armv7

it's related to this thread: http://forum.tinycorelinux.net/index.php/topic,25183.75.html#lastPost

i want to use piCore on the RPI3 with dual Monitor to see if the Freerdp session is faster

Yes it is a usb2 Device but i am getting no graphic with it and when i connect the device with windows 10 it work's, thats why i thought there is a driver missing on picore

[Juanito]

Is the udl driver loaded (if not, load it). Apparently with the driver loaded the usb to vga adapter can be configured with xrandr.

It would be useful to check the oem with lsusb.

[Rich]

Hi Rabie
udl.ko  is provided by graphics-5.10.16-piCore-v7.tcz:
http://tinycorelinux.net/13.x/armv7/tcz/graphics-5.10.16-piCore-v7.tcz.list
Is that installed?

[Rich]

Hi Rabie
If you are using  Xorg.tcz  make sure  graphics-5.10.16-piCore-v7.tcz  is listed before it in your  onboot.lst  file.

[Rabie]

Hi Juanito,

Is the udl driver loaded (if not, load it). Apparently with the driver loaded the usb to vga adapter can be configured with xrandr.

It would be useful to check the oem with lsusb.

when i use lsusb i get this:

Code: [Select]

lsusb
Protocol spec without prior Class and Subclass spec at line 23179
Bus 001 Device 004: ID 17e9:02ee DisplayLink
Bus 001 Device 003: ID 0424:ec00 Microchip Technology, Inc. (formerly SMSC) SMSC9512/9514 Fast Ethernet Adapter
Bus 001 Device 002: ID 0424:9514 Microchip Technology, Inc. (formerly SMSC) SMC9514 Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

but when i boot the RPI3 with the DisplayLink i am just getting a green Display the whole time

[Rabie]

Hi Rich,

Hi Rabie
If you are using  Xorg.tcz  make sure  graphics-5.10.16-piCore-v7.tcz  is listed before it in your  onboot.lst  file.

yes i am using Xorg and graphics-5.10.16-piCore-v7.tcz is installed but i am getting just a green Display with the DisplayLink 

[Rich]

Hi Rabie
Xorg.tcz  must be listed after  graphics-5.10.16-piCore-v7.tcz  in your  onboot.lst  file.

[Juanito]

Does lsmod show udl is loaded?

[Rabie]

Hi Rich,

Hi Rabie
Xorg.tcz  must be listed after  graphics-5.10.16-piCore-v7.tcz  in your  onboot.lst  file.

it is..

Code: [Select]

openssh.tcz
getlocale.tcz
mylocale.tcz
graphics-5.10.16-piCore-v7.tcz
Xorg.tcz
openbox.tcz


[Rabie]

Hi Juanito,

Does lsmod show udl is loaded?

Code: [Select]

tc@box:~$ lsmod
Module                  Size  Used by    Tainted: G
udl                    20480  0
drm_kms_helper        241664  1 udl
drm                   524288  2 udl,drm_kms_helper
drm_panel_orientation_quirks    16384  1 drm
backlight              20480  1 drm
brcmfmac              299008  0
brcmutil               20480  1 brcmfmac
udlfb                  28672  0
fb_sys_fops            16384  2 drm_kms_helper,udlfb
sysfillrect            16384  2 drm_kms_helper,udlfb
syscopyarea            16384  2 drm_kms_helper,udlfb
sysimgblt              16384  2 drm_kms_helper,udlfb
cfg80211              798720  1 brcmfmac
snd_bcm2835            28672  0
snd_pcm               114688  1 snd_bcm2835
snd_timer              36864  1 snd_pcm
rfkill                 32768  1 cfg80211
snd                    77824  3 snd_bcm2835,snd_pcm,snd_timer
fixed                  16384  0
squashfs               40960 235
zram                   28672  1
zsmalloc               28672  1 zram
raspberrypi_hwmon      16384  0



[Juanito]

Do you get any error messages when you attempt to configure the displaylink with xrandr?

[Rich]

Hi Rabie
Does  /var/log/Xorg.0.log  make any mention of your DisplayLink device?

Just an observation, but I see there is also a frame buffer driver (udlfb)  loaded for your DisplayLink device.

[Rabie]

Hi Juanito,

Do you get any error messages when you attempt to configure the displaylink with xrandr?

yes i get

Code: [Select]

tc@box:~$ xrandr
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 720 x 480, current 720 x 480, maximum 720 x 480
default connected 720x480+0+0 0mm x 0mm
   720x480        0.00*

i guess because of FBTURBO again ?

Xorg-3d didn't work also