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trepseq · 08-19-2016, 12:05 AM

Hello!

Today I got my new USB-DVI-Adapter with a Displaylink inside (HP NL571AA). After a couple of trials I found that my ubuntu 16.04 loads drivers for the adapter differently, in this ways:

a) Wait for boot up of computer, then connect the displaylink-adapter:

Code:

$ lsmod | grep udl
udl                    32768  0
drm_kms_helper        147456  3 udl,i915,evdi
drm                   364544  12 udl,i915,evdi,drm_kms_helper
$ lsmod | grep evdi
evdi                   40960  2
drm_kms_helper        147456  3 udl,i915,evdi
syscopyarea            16384  2 evdi,drm_kms_helper
sysfillrect            16384  2 evdi,drm_kms_helper
sysimgblt              16384  2 evdi,drm_kms_helper
drm                   364544  12 udl,i915,evdi,drm_kms_helper

Case a) results in the same responsiveness of mouse and graphical elements as when not using the adapter --> very good! Thank you for this adapter!

b) Connect the adapter with computer off, then start the computer:

Code:

$ lsmod | grep udl
udl                    32768  1
drm_kms_helper        147456  3 udl,i915,evdi
drm                   364544  10 udl,i915,evdi,drm_kms_helper
$ lsmod | grep evdi
evdi                   40960  0
drm_kms_helper        147456  3 udl,i915,evdi
syscopyarea            16384  2 evdi,drm_kms_helper
sysfillrect            16384  2 evdi,drm_kms_helper
sysimgblt              16384  2 evdi,drm_kms_helper
drm                   364544  10 udl,i915,evdi,drm_kms_helper

Case b) results in kind of a stucking responsiveness of mouse and graphical elements. Animations and mouse pointer run slower and not fluently. This happens only under this ciscumstances:
- I have a picture as desktop background
- the monitor connected to the displaylink-adapter is not fully covered by windows, so that parts of the picture can be seen.
If I choose a solid color background, the behaviour of b) is the same as a) (so everything is fine). If I maximize a window on the monitor connected to the displaylink-adapter, the behaviour of b) is also the same as a).

Unplugging the adapter in case b) results also in a crash of my X session, so I have to login again.
If I then disconnect the adapter and unload the module udl

Code:

sudo rmmod udl

and then reconnect the adapter again, these modules are loaded:

Code:

$ lsmod | grep udl
udl                    32768  0
drm_kms_helper        147456  3 udl,i915,evdi
drm                   364544  9 udl,i915,evdi,drm_kms_helper
$ lsmod | grep evdi
evdi                   40960  2
drm_kms_helper        147456  3 udl,i915,evdi
syscopyarea            16384  2 evdi,drm_kms_helper
sysfillrect            16384  2 evdi,drm_kms_helper
sysimgblt              16384  2 evdi,drm_kms_helper
drm                   364544  9 udl,i915,evdi,drm_kms_helper

Then the graphics and mouse pointer of the computer behave like in case a).

My question is: How can I make b) behave like a) without all the trouble?

I'm using ubuntu 16.04 with up-to-date packages and your driver in version 1.1.62.

Thank you for your help!

08-19-2016, 12:05 AM	#1
trepseq Junior Member Join Date: Aug 2016 Posts: 8	Sometimes graphics unresponsive Hello! Today I got my new USB-DVI-Adapter with a Displaylink inside (HP NL571AA). After a couple of trials I found that my ubuntu 16.04 loads drivers for the adapter differently, in this ways: a) Wait for boot up of computer, then connect the displaylink-adapter: Code: $ lsmod \| grep udl udl 32768 0 drm_kms_helper 147456 3 udl,i915,evdi drm 364544 12 udl,i915,evdi,drm_kms_helper $ lsmod \| grep evdi evdi 40960 2 drm_kms_helper 147456 3 udl,i915,evdi syscopyarea 16384 2 evdi,drm_kms_helper sysfillrect 16384 2 evdi,drm_kms_helper sysimgblt 16384 2 evdi,drm_kms_helper drm 364544 12 udl,i915,evdi,drm_kms_helper Case a) results in the same responsiveness of mouse and graphical elements as when not using the adapter --> very good! Thank you for this adapter! b) Connect the adapter with computer off, then start the computer: Code: $ lsmod \| grep udl udl 32768 1 drm_kms_helper 147456 3 udl,i915,evdi drm 364544 10 udl,i915,evdi,drm_kms_helper $ lsmod \| grep evdi evdi 40960 0 drm_kms_helper 147456 3 udl,i915,evdi syscopyarea 16384 2 evdi,drm_kms_helper sysfillrect 16384 2 evdi,drm_kms_helper sysimgblt 16384 2 evdi,drm_kms_helper drm 364544 10 udl,i915,evdi,drm_kms_helper Case b) results in kind of a stucking responsiveness of mouse and graphical elements. Animations and mouse pointer run slower and not fluently. This happens only under this ciscumstances: - I have a picture as desktop background - the monitor connected to the displaylink-adapter is not fully covered by windows, so that parts of the picture can be seen. If I choose a solid color background, the behaviour of b) is the same as a) (so everything is fine). If I maximize a window on the monitor connected to the displaylink-adapter, the behaviour of b) is also the same as a). Unplugging the adapter in case b) results also in a crash of my X session, so I have to login again. If I then disconnect the adapter and unload the module udl Code: sudo rmmod udl and then reconnect the adapter again, these modules are loaded: Code: $ lsmod \| grep udl udl 32768 0 drm_kms_helper 147456 3 udl,i915,evdi drm 364544 9 udl,i915,evdi,drm_kms_helper $ lsmod \| grep evdi evdi 40960 2 drm_kms_helper 147456 3 udl,i915,evdi syscopyarea 16384 2 evdi,drm_kms_helper sysfillrect 16384 2 evdi,drm_kms_helper sysimgblt 16384 2 evdi,drm_kms_helper drm 364544 9 udl,i915,evdi,drm_kms_helper Then the graphics and mouse pointer of the computer behave like in case a). My question is: How can I make b) behave like a) without all the trouble? I'm using ubuntu 16.04 with up-to-date packages and your driver in version 1.1.62. Thank you for your help! Last edited by trepseq; 08-19-2016 at 12:47 AM.