Control Center does not remember chosen sound device anymore.
It always reverts to the default one (HDMI Display Port 2 in my case).
In 15.4.1 the chosen sound device was remembered between system restarts (for example HDA Intel PCH - headphones).

https://bbs.deepin.org/user/88427 I agree with you about the beauty of Linux, and yes I also have the problem with control center not remember the chosen sound device anymore, it also reverts to another, in my case it happens with the default microphone as well.

Edited by danygee at 2017-11-13 21:39

Some issue found with the dock.
If you choose the behaviour "smart hide" or "always hide" and you try to call the dock by dragging the mouse to the edge of the screen, and you leave the cursor there (while having a maximized window on desktop or not) the dock keeps hiding and showing in a loop until you drag the cusror up a bit.
It happens only when the dock is on the bottom and on the right side (left and top positions are not affected).

Oh, you need to run this to get the package version:

not

Please exec 'gsettings set com.deepin.dde.daemon debug true' and chosen sound port, then restart and upload the feedback logs, thanks!

apt policy dde-launcher
dde-launcher:
Installed: 4.2.3-2
Candidate: 4.2.3-2
  Version table:
*** 4.2.3-2 500
        500 http://packages.deepin.com/deepin panda/main amd64 Packages
        100 /var/lib/dpkg/status

As desired.

本帖最后由 yanbowen 于 2017-11-14 11:07 编辑

The log finds that your HDMI device has an output port and is available, so it switches over.

Next we will improve the switch rules based on feedback or give configurable options.

Has your hdmi monitor sound output? Or you use an HDMI adapter.

Edited by danygee at 2017-11-14 22:27

My PC is connected to Samsung KS7000 TV via HDMI cable and ofcourse the TV has its sound output.
In 15.4.1 it worked as it should. I had exactly the same hardware, and your OS did remember what output was used as last.
What I noticed is, that when I change the output to headphones and restart, the login sound goes thru the headphones (as expected) but after my autostart script that changes refresh rate from 30Hz to 60Hz (xrandr --output HDMI-1 --primary --mode 3840x2160 --rate 60) the sound goes back to TV. Maybe this command resets the sound output?
But exactly the same command I used in 15.4.1 and OS did not switch the sound output.
EDIT:
Tested it, and yes, the command (xrandr --output HDMI-1 --primary --mode 3840x2160 --rate 60) resets the sound device in 15.5.
But it didnt in 15.4.1.
Don't know why. Maybe you can figure it out.

And as for my other question:
Why after choosing 4K resolution @60Hz and saving the nvidia config to /etc/X11/xorg.conf, after reboot, only the greeter displays 4k@60Hz, and as soon I'm in the desktop it changes to 4K@30Hz?

I have the same version as your dde-launcher package, but with no highlight delay problem at all.

By highlight animation I didn't mean the darker background, but this little zoom in animation of the highlighted icon.
It is too slow for now, It should be faster.

Edited by danygee at 2017-11-15 16:12

Deepin Image Viewer (flatpack), once you import couple thousand of photos to it (2700 in my case), becomes totally unresponsive while in timeline tab.
Every operation, like scrolling or highlighting a photo or any of window controls, has 1s delay.

And all of that on a quite powerfull machine:

Control Center's appear and disappear animations are significantly less smooth while in 4K resolution.
In 1920x1080 they are pleasingly smooth.

Edited by danygee at 2017-11-15 15:39

Deepin Screen Recorder (flatpack) has some problems while recording as gif @4K resolution and display scaling x2.While recording fullscreen as gif, the output is (see attached gif).
While recording custom area as gif the gif is not being created (no thumbnail, black screen while opening the gif).
When recording fullscreen and custom area as mp4, the quality is very pixelated. Looks like bitrate is too low (~9 mbit).

Another small issue found in dde-dock.
Once you mount a ntfs partition, new icon of mounted disk appears in the dock, and that is perfectly fine.
But once you unmount the partition, the clock icon is recognized as mounted disk icon (when you hoover over it) and when you click it, nothing happens.To resolve the issue I need to restart the dde-dock.
And it looks like this:

Deepin Calendar does not remember first day of the week settings. It reverts always to sunday.
Feature request:
Dock icon of the calendar could show current day number of the month.

When opening a folder in dde-filemanager as root, the opened window does not scale and looks tiny @ 4K and UI x2.
Hope you figure out, how to scale it too, according to user's set interface scaling.

Dock feature request:
Remember the position of  plugin icons (network, power, volume).