Topic: Ubuntu 16.04.04 64 bit LTS & Oppo Digital HA-1 DAC & Headphone Amplifier (Read 16188 times)

wellywu · « **on:** June 17, 2016, 06:07:42 am »

http://ubuntuforums.org/showthread.php?t=2327990

I know that this is my Ubuntu Forums thread, but this problem affects JRiver Media Center 21 64 bit for Ubuntu 16.04.0 64 bit LTS GNU/Linux. Basically, Ubuntu Linux kernel 4.4.0-24 AMD64 is my current version and it is the same as Linux kernel 4.4.1 AMD64. The problem is that I can not see or select my Oppo Digital HA-1 desktop DAC and headphone amplifier which consequently means that I can not hear audio, music, or sound using it. I am at a loss as to understand this problem in depth and I am requesting more light to be shined upon this technical issue from this community since it affects JRiver MC 21. Please excuse my rambling in both my Ubuntu Forums and this thread as I am investigating this problem to the best of my abilities and I am trying to post useful information. Do let me know what information you need from me to help you to help me. Please explain this as clearly as possible so I have an idea as to where to look into this problem and let me know if there is anything that I can do to fix it myself with your help. Thank you.

Rizlaw · « **Reply #1 on:** June 17, 2016, 10:29:26 am »

Quote from: wellywu on June 17, 2016, 06:07:42 am

http://ubuntuforums.org/showthread.php?t=2327990

I know that this is my Ubuntu Forums thread, but this problem affects JRiver Media Center 21 64 bit for Ubuntu 16.04.0 64 bit LTS GNU/Linux. Basically, Ubuntu Linux kernel 4.4.0-24 AMD64 is my current version and it is the same as Linux kernel 4.4.1 AMD64. The problem is that I can not see or select my Oppo Digital HA-1 desktop DAC and headphone amplifier which consequently means that I can not hear audio, music, or sound using it. I am at a loss as to understand this problem in depth and I am requesting more light to be shined upon this technical issue from this community since it affects JRiver MC 21. Please excuse my rambling in both my Ubuntu Forums and this thread as I am investigating this problem to the best of my abilities and I am trying to post useful information. Do let me know what information you need from me to help you to help me. Please explain this as clearly as possible so I have an idea as to where to look into this problem and let me know if there is anything that I can do to fix it myself with your help. Thank you.

I use the same version of Ubuntu running a W4S DAC-2se DSD and Audiophilleo 2. Assuming that your Oppo states that it is compatible with Linux (not all are, although these days, that's less true) and that you have it connected to your computer correctly.

Open a terminal in Ubuntu and run the command: aplay -l

This command will list all of the audio devices that Ubuntu sees connected to your computer. Here is what my computer currently lists:

Code: [Select]

card 0: STX [Xonar STX], device 0: Multichannel [Multichannel]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: STX [Xonar STX], device 1: Digital [Digital]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: SN0104 [audiophilleo2      v1.35 SN0104], device 0: USB Audio [USB Audio]
  Subdevices: 0/1
  Subdevice #0: subdevice #0
card 2: NVidia [HDA NVidia], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 2: NVidia [HDA NVidia], device 7: HDMI 1 [HDMI 1]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 2: NVidia [HDA NVidia], device 8: HDMI 2 [HDMI 2]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

In my case, CARD 1 would be my DAC-2se/Audiophilleo 2. If you don't see your Oppo listed, then MC21 isn't going to find it either, which possibly means, that your Oppo is not Linux compatible, may need a Linux driver from Oppo, is not connected properly (bad USB cable for example) or something in your Oppo's settings needs to be changed.

If the Oppo is listed, start MC21 and open TOOLS > OPTIONS > AUDIO DEVICES and click on "audio devices". You should see a similar list of audio devices to those listed in the Terminal. Find your Oppo and select it.

Hope this helps.

wellywu · « **Reply #2 on:** June 17, 2016, 10:31:59 am »

That was stated in my thread in my own reply. Aplay -l lists the Oppo, but the Linux kernel 4.6.2 has the device driver, but it needs a patch for the correct vendor ID. At this point, I could download the Ubuntu mainline kernel PPA and do the work myself. However, it is wise not to trifle with the Linux kernel. GNU/Linux assumes that you know exactly what you are doing which I do. I can wait patiently for the Linux kernel team and Canonical, Ltd. to release a future LTS hardware enablement stack with the correct Linux kernel version and patch to fix my Oppo Digital HA-1.

Rizlaw · « **Reply #3 on:** June 17, 2016, 11:22:42 am »

Quote from: wellywu on June 17, 2016, 10:31:59 am

That was stated in my thread in my own reply. Aplay -l lists the Oppo, but the Linux kernel 4.6.2 has the device driver, but it needs a patch for the correct vendor ID. At this point, I could download the Ubuntu mainline kernel PPA and do the work myself. However, it is wise not to trifle with the Linux kernel. GNU/Linux assumes that you know exactly what you are doing which I do. I can wait patiently for the Linux kernel team and Canonical, Ltd. to release a future LTS hardware enablement stack with the correct Linux kernel version and patch to fix my Oppo Digital HA-1.

I am totally confused by your reply, as it makes little sense to me.

In your first post above you claimed that in Ubuntu 16.04LTS with the 4.4.0-24 kernel you could not see your Oppo in MC21 and declared this to be an MC21 problem. In this reply you seem to contradict that by stating that you did run the command aplay -l (a fact you did not mention in the 1st post) and it lists your Oppo as an audio device in Ubuntu. Which is it? If it's listed in Ubuntu, then it should also be listed in MC21. If not, then Jim and his team will have to look into it.

The Oppo webpage https://www.oppodigital.com/headphone-amplifier-ha-1/headphone-amplifier-HA-1-Support.aspx states that no Linux driver is needed for current Linux operating systems. That IMHO would include not only 16.04 LTS, but also 14.04 LTS.

Furthermore, to the best of my knowledge, MC21 lists the same audio devices found by Ubuntu/Debian OSs (and I'm sure other Linux OSs as well). So, I don't understand why you are talking about waiting for Ubuntu to come out with a 4.6.x kernel to fix your "problem".

If my suggestions did not help, then you'll have to wait for the MC Team guru's to help you.

wellywu · « **Reply #4 on:** June 17, 2016, 11:28:53 am »

wellywu@ZareasonZeto:~$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC892 Analog [ALC892 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 1: ALC892 Digital [ALC892 Digital]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 3: HDMI 0 [HDMI 0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 7: HDMI 1 [HDMI 1]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 8: HDMI 2 [HDMI 2]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 9: HDMI 3 [HDMI 3]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 2: Headset [Logitech G35 Headset], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 4: DAC [OPPO HA-1 USB AUDIO 2.0 DAC], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
wellywu@ZareasonZeto:~$ lsusb
Bus 002 Device 002: ID 8087:8001 Intel Corp.
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 8087:8009 Intel Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 004: ID 05e3:0616 Genesys Logic, Inc. hub
Bus 004 Device 003: ID 174c:55aa ASMedia Technology Inc. ASM1051E SATA 6Gb/s bridge, ASM1053E SATA 6Gb/s bridge, ASM1153 SATA 3Gb/s bridge
Bus 004 Device 002: ID 0bc2:ab2a Seagate RSS LLC
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 007: ID 046d:082d Logitech, Inc. HD Pro Webcam C920
Bus 003 Device 006: ID 046d:c24d Logitech, Inc. G710 Gaming Keyboard
Bus 003 Device 004: ID 046d:c07d Logitech, Inc.
Bus 003 Device 005: ID 045e:028e Microsoft Corp. Xbox360 Controller
Bus 003 Device 003: ID 05e3:0610 Genesys Logic, Inc. 4-port hub
Bus 003 Device 002: ID 046d:0a15 Logitech, Inc.
Bus 003 Device 012: ID 8087:07dc Intel Corp.
Bus 003 Device 017: ID 22d9:0416
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
wellywu@ZareasonZeto:~$ find /lib/modules/'uname-r' | grep snd
find: ‘/lib/modules/uname-r’: No such file or directory
wellywu@ZareasonZeto:~$ find /lib/modules/'uname -r' | grep snd
find: ‘/lib/modules/uname -r’: No such file or directory
wellywu@ZareasonZeto:~$ lspci -v | grep -A7 -i "audio"
00:1b.0 Audio device: Intel Corporation 9 Series Chipset Family HD Audio Controller
Subsystem: Gigabyte Technology Co., Ltd 9 Series Chipset Family HD Audio Controller
Flags: bus master, fast devsel, latency 0, IRQ 31
Memory at f7330000 (64-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel

00:1c.0 PCI bridge: Intel Corporation 9 Series Chipset Family PCI Express Root Port 1 (rev d0) (prog-if 00 [Normal decode])
--
01:00.1 Audio device: NVIDIA Corporation Device 0fb0 (rev a1)
Subsystem: eVga.com. Corp. Device 2992
Flags: bus master, fast devsel, latency 0, IRQ 17
Memory at f7080000 (32-bit, non-prefetchable) [size=16K]
Capabilities: <access denied>
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel

wellywu@ZareasonZeto:~$

I apologize for confusing this community. Based upon my intense research, the problem lies with the Linux kernel version and the team more so than with Canonical, Ltd. The Linux kernel team added native DSD capability to the Linux kernel 4.4.x series. The Oppo Digital HA-1 uses a XMOS chipset, but they use their own unique identifier ID. The Linux kernel team has a patch available to fix the incorrect identifier ID for the HA-1, but that must be manually patched and added to the Linux kernel at version 4.6.2 or above because it is this version that has the new device driver for the HA-1 with support for DSD and the XMOS chipset. As it stands now, Linux kernel 4.6.2 does not include the HA-1 patch yet.

The way that Canonical, Ltd. releases future LTS hardware enablement stacks is to provide a fairly recent Linux kernel version along with the X.Org stack or in the case of Ubuntu 16.04.x version, the XMir display server and client stack. This is what I was referring to, but I omitted some key details based upon my research because I was chatting with other Linux subject matter experts that helped me to look into this issue.

Awesome Donkey · « **Reply #5 on:** June 17, 2016, 01:37:26 pm »

Try running this in a Terminal and posting the output here:

Code: [Select]

/usr/lib/jriver/Media\ Center\ 21/alsacap

wellywu · « **Reply #6 on:** June 17, 2016, 01:43:43 pm »

wellywu@ZareasonZeto:~$ /usr/lib/jriver/Media\ Center\ 21/alsacap
*** Scanning for playback devices ***
ALSA lib conf.c:3357:(snd_config_hooks_call) Cannot open shared library libasound_module_conf_pulse.so
ALSA lib control.c:954:(snd_ctl_open_noupdate) Invalid CTL hw:0
Error opening control interface for card 0: Device does not exist. Skipping.
Card 1, ID `NVidia', name `HDA NVidia'
Device 3, ID `HDMI 0', name `HDMI 0', 1 subdevices (1 available)
2..8 channels, sampling rates 32000, 44100, 48000, 88200, 96000, 176400, 192000 Hz
Sample formats: S16_LE, S32_LE
Subdevice 0, name `subdevice #0'
Device 7, ID `HDMI 1', name `HDMI 1', 1 subdevices (1 available)
2..8 channels, sampling rates 32000, 44100, 48000, 88200, 96000, 176400, 192000 Hz
Sample formats: S16_LE, S32_LE
Subdevice 0, name `subdevice #0'
Device 8, ID `HDMI 2', name `HDMI 2', 1 subdevices (1 available)
2..8 channels, sampling rates 32000, 44100, 48000, 88200, 96000, 176400, 192000 Hz
Sample formats: S16_LE, S32_LE
Subdevice 0, name `subdevice #0'
Device 9, ID `HDMI 3', name `HDMI 3', 1 subdevices (1 available)
2..8 channels, sampling rates 32000, 44100, 48000, 88200, 96000, 176400, 192000 Hz
Sample formats: S16_LE, S32_LE
Subdevice 0, name `subdevice #0'
Card 2, ID `Headset', name `Logitech G35 Headset'
Device 0, ID `USB Audio', name `USB Audio', 1 subdevices (1 available)
2 channels, sampling rates 8000, 11025, 16000, 22050, 32000, 44100 Hz
Sample formats: S16_LE
Subdevice 0, name `subdevice #0'
Card 3, ID `C920', name `HD Pro Webcam C920'
Card 4, ID `DAC', name `OPPO HA-1 USB AUDIO 2.0 DAC'
Device 0, ID `USB Audio', name `USB Audio', 1 subdevices (1 available)
2 channels, sampling rates 44100, 48000, 88200, 96000, 176400, 192000, 352800, 384000 Hz
Sample formats: S32_LE, SPECIAL
Subdevice 0, name `subdevice #0'
wellywu@ZareasonZeto:~$

wellywu · « **Reply #7 on:** June 17, 2016, 01:45:51 pm »

This is not a JRiver problem per se. It's outside of the scope of JRiver, but I thought to post my thread here and see what some members have to say.

The funny thing is that Oppo Digital HA-1 USB 2.0 DAC is listed, but when I find and select it, I get either a DoP 2.8 MHz or ALSA 16 bit 44.1 kHz playback error. No music or audio plays as a result.

st1 · « **Reply #8 on:** June 18, 2016, 02:26:40 am »

it might be related to this bug (?)

https://bugs.launchpad.net/ubuntu/+source/fwupd/+bug/1574079
http://askubuntu.com/questions/762414/problems-with-audio-device-alc-889-ubuntu-16-04/766069#766069

I did not have troubles with 14.04, but after upgrading to 16.04 or making fresh install 16.04 the problems started.

Disconnecting & reconnecting the audio device usb cable few times I can see device in ubuntu sound settings, but no sound.

And only audio that is visible is HDMI and even that has quality problems. My nuc pc has i7 so it is not lack of performance.

wellywu · « **Reply #9 on:** June 18, 2016, 07:18:15 am »

I read the Ubuntu 16.04 fwupd bug tracker and I added the PPA and followed the directions. I unplugged my Oppo Digital HA-1 from the USB. I reset the Oppo Digital HA-1. I opened the terminal and typed in sudo killall fwupd. I added the ppa. I rebooted. I plugged in the Oppo Digital HA-1. It still does not work. I can not see or select my Oppo Digital HA-1. Consequently, I get no sound. Thanks for this bug report and tracker, but it does not work for me.

wellywu · « **Reply #10 on:** June 18, 2016, 07:54:09 am »

Does anyone here know how to download Linux kernel 4.6.2 AMD64 and include the Oppo Digital HA-1 patch?

Awesome Donkey · « **Reply #11 on:** June 18, 2016, 09:22:10 am »

You'd likely have to download the kernel source, apply the patch and build the kernel yourself. Which from experience (even on this fast, high-end machine) can take awhile to compile.

Is the patch going to land in 4.6.3?

Better question, has it landed in the 4.7 RC releases yet?

wellywu · « **Reply #12 on:** June 18, 2016, 09:30:11 am »

Ubuntu Forums told me that Ubuntu Linux kernel 4.4.0 AMD64 includes the Oppo Digital HA-1 device driver and patch. Now, they are telling me it might be an ALSA issue and they referred me to the Ubuntu Sound Troubleshooting guide. I checked the Ubuntu Linux kernel 4.4.0 and it does contain the HA-1 device driver and patch. So does Linux kernel 4.6.2 without the patch which must be manually added in.

Should I downgrade to Ubuntu 14.04.4 64 bit LTS? I contacted Oppo Digital and Zareason and Zareason told me to downgrade to 14.04.4 64 bit LTS.

I want to keep getting replies and more information before I downgrade or switch to another distribution.

wellywu · « **Reply #13 on:** June 18, 2016, 11:45:02 am »

I downgraded to Ubuntu 14.04.4 64 bit LTS GNU/Linux on my mid-2015 Zareason Zeto desktop PC system.

I will check for the next 14.04.x 64 bit LTS Hardware Enablement Stack and see if it causes USB 2.0 audio problems or more problems for my Oppo Digital HA-1 desktop DAC and headphone amplifier.

I can now select it and listen to audio, music, and sound. It is fixed for now.

I miss Ubuntu 16.04.0 64 bit LTS GNU/Linux, but I still own my Sager NP8657 [Clevo P650-RE3] gaming laptop and it has the latest Ubuntu version. I like it on my gaming laptop because Linux kernel 4.4.x 64 bit has better support for Intel 6th Generation "Skylake" CPUs.

Awesome Donkey · « **Reply #14 on:** June 18, 2016, 11:53:57 am »

Quote from: wellywu on June 18, 2016, 11:45:02 am

I miss Ubuntu 16.04.0 64 bit LTS GNU/Linux, but I still own my Sager NP8657 [Clevo P650-RE3] gaming laptop and it has the latest Ubuntu version. I like it on my gaming laptop because Linux kernel 4.4.x 64 bit has better support for Intel 6th Generation "Skylake" CPUs.

You *can* manually install updated kernels in Ubuntu using their mainline kernel repository.

https://wiki.ubuntu.com/Kernel/MainlineBuilds
http://kernel.ubuntu.com/~kernel-ppa/mainline/

I don't recommend this unless you know exactly what you're doing (and making sure you're installing the right files). For example if you're wanting 4.6.2 just navigate and click on the v4.6.2-yakkety folder, then download the following files for a 64-bit (AMD64) Ubuntu install;

Code: [Select]

linux-headers-4.6.2-040602-generic_4.6.2-040602.201606100516_amd64.deb
linux-headers-4.6.2-040602_4.6.2-040602.201606100516_all.deb
linux-image-4.6.2-040602-generic_4.6.2-040602.201606100516_amd64.deb

And installing them by opening a Terminal and using sudo dpkg -i path to each file (you can drag and drop all three files after -i and a space!)

Avoid the lowlatency kernels and the kernels for other architectures.

st1 · « **Reply #15 on:** June 19, 2016, 08:51:21 am »

Quote from: Awesome Donkey on June 17, 2016, 01:37:26 pm

Try running this in a Terminal and posting the output here:

Code: [Select]
/usr/lib/jriver/Media\ Center\ 21/alsacap

with several usb connect-reconnect and then sound driver visible:

ubuntu 16.04 lts usb sound device trubbel hunting

1. in terminal

$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: HDMI [HDA Intel HDMI], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: HDMI [HDA Intel HDMI], device 7: HDMI 1 [HDMI 1]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: HDMI [HDA Intel HDMI], device 8: HDMI 2 [HDMI 2]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: PCH [HDA Intel PCH], device 0: ALC283 Analog [ALC283 Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 2: M20 [MC-3+ Smart Clock USB 2.0], device 0: USB Audio [USB Audio]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

2. in terminal

:~$ /usr/lib/jriver/Media\ Center\ 21/alsacap

*** Scanning for playback devices ***
Card 0, ID `HDMI', name `HDA Intel HDMI'

  Device 3, ID `HDMI 0', name `HDMI 0', 1 subdevices (1 available)
   2..6 channels, sampling rates 32000, 44100, 48000 Hz
   Sample formats: S16_LE, S32_LE
   Subdevice 0, name `subdevice #0'

  Device 7, ID `HDMI 1', name `HDMI 1', 1 subdevices (1 available)
   2..8 channels, sampling rates 32000, 44100, 48000, 88200, 96000, 176400, 192000 Hz
   Sample formats: S16_LE, S32_LE, IEC958_SUBFRAME_LE
   Subdevice 0, name `subdevice #0'

  Device 8, ID `HDMI 2', name `HDMI 2', 1 subdevices (1 available)
   2..8 channels, sampling rates 32000, 44100, 48000, 88200, 96000, 176400, 192000 Hz
   Sample formats: S16_LE, S32_LE, IEC958_SUBFRAME_LE
   Subdevice 0, name `subdevice #0'

Card 1, ID `PCH', name `HDA Intel PCH'

  Device 0, ID `ALC283 Analog', name `ALC283 Analog', 1 subdevices (1 available)
   2 channels, sampling rates 44100, 48000, 96000, 192000 Hz
   Sample formats: S16_LE, S32_LE
   Subdevice 0, name `subdevice #0'

Card 2, ID `M20', name ` MC-3+ Smart Clock USB 2.0 '

  Device 0, ID `USB Audio', name `USB Audio', 1 subdevices (1 available)
   2 channels, sampling rates 44100, 48000, 88200, 96000, 176400, 192000, 352800 Hz
   Sample formats: S16_LE, S32_LE, SPECIAL
   Subdevice 0, name `subdevice #0'

this is frustrating. I will now maybe reinstall 14.04.4 an try again ....
I know usb unit supplier is not supporting linux, but mac is on the list and it worked perfect with 14.04.

thanks for the hints sofar!

wellywu · « **Reply #16 on:** June 19, 2016, 09:01:04 am »

Listen to me. Install Ubuntu 14.04.4 64 bit LTS again on your desktop or laptop.

DO NOT upgrade the Linux kernel any higher than 4.2.x AMD64. It is Linux kernel 4.4.0 AMD64 that might be causing this problem with some high end USB 2.0 audio DACs and headphone amplifiers. So, do not download and install the next Ubuntu 14.04.5 64 bit LTS Hardware Enablement Stack right away. This is coming in August 2016.

I am not giving up on Ubuntu 16.04 64 bit LTS. I own a Sager NP8657 [Clevo P650-RE3] gaming laptop with it installed. It works with my Chord Mojo portable DAC and headphone amplifier. So, I might test future patches and updates by plugging in my Oppo Digital HA-1 until this problem is solved. When it is indeed solved in due time, then I will reinstall Ubuntu 16.04.x 64 bit LTS on my mid-2015 Zareason Zeto desktop PC system again.

I will keep people in this thread and over at Ubuntu Forums up to date about my findings.

st1 · « **Reply #17 on:** June 19, 2016, 09:28:53 am »

now downgraded to 14.04,4 without any updates and usb device audio is visible without any trics. Great !

I just wonder what updates I can take without killing the system again.

Am I safe if I get updates only until August and stop updating before the
14.04.5 64 bit LTS Hardware Enablement Stack, that is coming in August 2016.

or when to stop updating ?

the ubuntu errors fix team should get more pressure that critical usb audio not working

wellywu · « **Reply #18 on:** June 19, 2016, 09:32:20 am »

If I were you, do not download and install Ubuntu 14.04.5 64 bit Hardware Enablement Stack in August 2016. Just make sure not to download and install Linux kernel above 4.2.x AMD64. If Ubuntu 14.04.5 64 bit LTS ships with Linux kernel 4.4.x AMD64, then do not download and install it manually. Canonical, Ltd. does not force you to download the LTS Hardware Enablement Stack upgrade; that must be done manually.

1. https://bugs.launchpad.net/ubuntu/+source/fwupd/+bug/1574079

Check out this Ubuntu bug report. You might want to create or log into your Launchpad account and subscribe to this bug report and post your comments if you are still using Ubuntu 16.04.x 64 bit LTS.

Awesome Donkey · « **Reply #19 on:** June 19, 2016, 10:20:33 am »

It seems to me the Ubuntu 16.04 LTS release has been plagued with problems. They just recently released a fix via kernel update for a XHCI USB issue (which was fixed in 4.6.2 and above) I've had with Ubuntu and other distros for a year and a half now.

wellywu · « **Reply #20 on:** June 19, 2016, 10:23:59 am »

I got the fix working.

If you are using Ubuntu 16.04.0 64 bit LTS, then enable xenial-proposed in developer options under the system settings -> Software & Updates -> Developer Options. Do a sudo apt-get update && sudo apt-get upgrade && sudo apt-get dist-upgrade. Make sure to unplug and reset your USB 2.0 DAC and headphone amplifier back to factory default settings. Unplug the USB 2.0 cable from your PC. After doing the Ubuntu upgrades and dist-upgrade, shut down your PC. Boot it back up. Log into your Ubuntu Administrator account. Plug in your USB 2.0 DAC. Find it under sound devices and select it. Test the audio with the left and right channel. Play an audio file. It works with my Oppo Digital HA-1 and Chord Mojo now. It is fixed.

st1 · « **Reply #21 on:** June 19, 2016, 11:25:32 am »

.-) no more fixes yet. Thanks for results !

I just got my i7 passive cooling akasa aluminium chassis upgrade done to nuc. The content copy is going on from back up.

I will not upgarde into 16.04 before main release is stable or get some more energy....

INTERACT FORUM

Author Topic: Ubuntu 16.04.04 64 bit LTS & Oppo Digital HA-1 DAC & Headphone Amplifier (Read 16188 times)