我知道这个问题已经被探索过了，但是之前的解决方案都尝试过了但都无济于事。
硬件说明：CD/DVD 在 Windows 7、8 和 10 下可用。已验证：在此 PC 上安装 Windows 10 - CD/DVD 可用。在此计算机上安装 Ubuntu - CD/DVD 不可用。返回 Windows 10 - CD/DVD 可用，无问题。
音频 CD：
- 商业生产的原创音频 CD（不是复制品）提供“音频 CD”图标，旋转、暂停、旋转并反复尝试。最后错误为“无法访问“音频磁盘”。驱动器 /dev/sr0 不包含音频文件”
DVD：
- 商业制作的原创音频 CD（不是复制品）。生成 DVD 图标。DVD 文件出现在文件资源管理器中：
视频文件无法播放：
尝试过这个：
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 20.04.1 LTS
Release: 20.04
Codename: focal
$ sudo add-apt-repository multiverse
'multiverse' distribution component is already enabled for all sources.
$ sudo apt install libdvd-pkg
Reading package lists... Done
Building dependency tree
Reading state information... Done
libdvd-pkg is already the newest version (1.4.2-1-1).
The following packages were automatically installed and are no longer required:
libfprint-2-tod1 libllvm9 python3-click python3-colorama
Use 'sudo apt autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 9 not upgraded.
$ sudo dpkg-reconfigure libdvd-pkg
libdvd-pkg: guest package [libdvdcss2/1.4.2-1~local] is already installed.
系统：
$ inxi -F
System:
Host: scott-HP-Pavilion-g6-Notebook-PC Kernel: 5.4.0-48-generic x86_64
bits: 64 Desktop: Gnome 3.36.4 Distro: Ubuntu 20.04.1 LTS (Focal Fossa)
Machine:
Type: Laptop System: Hewlett-Packard product: HP Pavilion g6 Notebook PC
v: 0889110002305910000620100 serial: <superuser/root required>
Mobo: Hewlett-Packard model: 1849 v: 57.34
serial: <superuser/root required> UEFI: Insyde v: F.23 date: 11/22/2012
Battery:
ID-1: BAT0 charge: 41.1 Wh condition: 41.1/41.1 Wh (100%)
CPU:
Topology: Quad Core model: AMD A8-4500M APU with Radeon HD Graphics
bits: 64 type: MCP L2 cache: 2048 KiB
Speed: 1354 MHz min/max: 1400/1900 MHz Core speeds (MHz): 1: 1356 2: 1362
3: 1321 4: 1344
Graphics:
Device-1: AMD Trinity [Radeon HD 7640G] driver: radeon v: kernel
Display: x11 server: X.Org 1.20.8 driver: radeon resolution: 1366x768~60Hz
OpenGL: renderer: AMD ARUBA (DRM 2.50.0 / 5.4.0-48-generic LLVM 10.0.0)
v: 4.3 Mesa 20.0.8
Audio:
Device-1: AMD Trinity HDMI Audio driver: snd_hda_intel
Device-2: AMD FCH Azalia driver: snd_hda_intel
Device-3: GN Netcom HP TrueVision HD type: USB
driver: jabra,snd-usb-audio,usbhid
Sound Server: ALSA v: k5.4.0-48-generic
Network:
Device-1: Qualcomm Atheros AR9485 Wireless Network Adapter driver: ath9k
IF: wlo1 state: down mac: 20:16:d8:0a:6d:75
Device-2: Realtek RTL810xE PCI Express Fast Ethernet driver: r8169
IF: eno1 state: down mac: 84:34:97:86:b8:c9
Device-3: Ralink RT5372 Wireless Adapter type: USB driver: rt2800usb
IF: wlx9cefd5fc9c02 state: up mac: 9c:ef:d5:fc:9c:02
Drives:
Local Storage: total: 585.01 GiB used: 66.04 GiB (11.3%)
ID-1: /dev/sda vendor: Samsung model: SSD 860 EVO 500GB size: 465.76 GiB
ID-2: /dev/sdb type: USB vendor: SanDisk model: Cruzer Glide
size: 119.25 GiB
Partition:
ID-1: / size: 456.96 GiB used: 39.11 GiB (8.6%) fs: ext4 dev: /dev/sda2
Sensors:
System Temperatures: cpu: 63.0 C mobo: N/A gpu: radeon temp: 61 C
Fan Speeds (RPM): N/A
Info:
Processes: 204 Uptime: 1h 59m Memory: 7.25 GiB used: 848.0 MiB (11.4%)
Shell: bash inxi: 3.0.38
有任何想法吗？
提前致谢！！！