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Old 01-12-2019, 06:33 AM   #1
David Lee
Junior Member
Join Date: Jan 2019
Posts: 1
Default Does Y-3702 (it use DL-3500) support frame buffer /dev/fb1 in uBuntu 16.04.3 LTS?

I bought a Y-3702 two days ago and want to use frame buffer /dev/fb1 in Linux PC of uBuntu 16.04.3 LTS to draw pictures on the connected Monitor of Full-HD resolution (1920x1080). However, it seems the Y-3702 could not correctly recognize my LG monitor. The resolution reported from "fbset -i -fb /dev/fb1" is always 1024x768. I have attached the messages of "fbset -i" and "dmesg -w" of my uBuntu Linux as followings. My PC is "Shuttle Slim PC XH110G".
Following message does always show up as soon as I plug-in the Y-3702 into the USB3.0 port of my PC.

evdi evdi.0: No connectors reported connected with modes

Then, following message comes along accordingly.

[drm] Cannot find any crtc or sizes - going 1024x768

Is it normal?

Please help me to solve this problem ASAP.
Thanks a lot.

Best Regards,

David Lee,

////////// Log of Message from driver installation of ./displaylink-driver-4.4.24.run //////////

root@labrat-XH110G:~/temp/display_link# sudo displaylink-installer uninstall
DisplayLink Linux Software 4.4.24 install script called: uninstall
Distribution discovered: Ubuntu 16.04.3 LTS
Removing EVDI from kernel tree, DKMS, and removing sources.
Stopping DLM systemd service
Removing suspend-resume hooks
Removing udev rule
Removing Core folder

Uninstallation steps complete.
root@labrat-XH110G:~/temp/display_link# ./displaylink-driver-4.4.24.run
Verifying archive integrity... 100% All good.
Uncompressing DisplayLink Linux Driver 4.4.24 100%
DisplayLink Linux Software 4.4.24 install script called: install
Distribution discovered: Ubuntu 16.04.3 LTS
Configuring EVDI DKMS module
Registering EVDI kernel module with DKMS
Building EVDI kernel module with DKMS
Installing EVDI kernel module to kernel tree
EVDI kernel module built successfully
Installing x64-ubuntu-1604/DisplayLinkManager
Installing libraries
Installing firmware packages
Installing licence file
Adding udev rule for DisplayLink DL-3xxx/5xxx devices

Please read the FAQ

////////// Log of Message from fbset -i -fb /dev/fb1 //////////

root@labrat-XH110G:~/temp/display_link# uname -a
Linux labrat-XH110G 4.8.0-41-generic #44~16.04.1-Ubuntu SMP Fri Mar 3 17:11:16 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
root@labrat-XH110G:~/temp/display_link# fbset -i -fb /dev/fb1

mode "1024x768"
geometry 1024 768 1024 768 32
timings 0 0 0 0 0 0 0
accel true
rgba 8/16,8/8,8/0,0/0

Frame buffer device information:
Name : evdidrmfb
Address : 0xffffaf81c07e5000
Size : 3145728
XPanStep : 1
YPanStep : 1
YWrapStep : 0
LineLength : 4096
Accelerator : No

////////// Log of Message from dmesg -w ////////
[ 622.894646] usb 2-2: new SuperSpeed USB device number 2 using xhci_hcd
[ 622.915280] usb 2-2: New USB device found, idVendor=17e9, idProduct=4301
[ 622.915284] usb 2-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 622.915288] usb 2-2: Product: usb3.0 display
[ 622.915290] usb 2-2: Manufacturer: DisplayLink
[ 622.915292] usb 2-2: SerialNumber: 0001360530045
[ 622.957472] usb 2-2: Warning! Unlikely big volume range (=511), cval->res is probably wrong.
[ 622.957474] usb 2-2: [13] FU [USB audio Playback Volume] ch = 6, val = -8176/0/16
[ 622.957739] usbcore: registered new interface driver snd-usb-audio
[ 624.022439] evdi: loading out-of-tree module taints kernel.
[ 624.022555] evdi: module verification failed: signature and/or required key missing - tainting kernel
[ 624.024288] evdi: [I] Initialising logging on level 5
[ 624.024289] evdi: [I] Atomic driver:no
[ 624.363985] evdi: [D] evdi_add_devices:134 Increasing device count to 1
[ 624.364915] evdi: [D] evdi_crtc_init:353 drm_crtc_init: 0
[ 624.365745] evdi: [W] evdi_painter_crtc_state_notify:486 Painter does not exist!
[ 624.365749] evdi: [D] evdi_detect:79 Painter is disconnected
[ 624.365754] evdi evdi.0: No connectors reported connected with modes .. I am sure the LG Monitor of Full-HD resolution did connect with the Y-3702
[ 624.365758] [drm] Cannot find any crtc or sizes - going 1024x768
[ 624.369952] evdi evdi.0: fb1: evdidrmfb frame buffer device
[ 624.369957] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[ 624.369958] [drm] No driver support for vblank timestamp query.
[ 624.369960] [drm] evdi: evdi_stats_init
[ 624.369967] [drm] Initialized evdi 1.5.1 20180731 on minor 1
[ 624.391037] evdi: [D] evdi_painter_connect:574 (dev=1) Connected with ffff9de86e7bec00
[ 624.391040] evdi: [D] evdi_detect:76 (dev=1) Painter is connected
[ 624.391502] evdi: [D] evdi_painter_crtc_state_notify:483 (dev=1) Notifying crtc state: 3
[ 1529.714962] open /dev/fb1 user=1 fb_info=ffff9de86f0ba000 count=1
[ 1529.715206] released /dev/fb1 user=1 count=0
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