openSUSE Linux video freezes using HDMI monitor

Discussion created by howard on Sep 7, 2020


    Starting about a week ago, the video display freezes / locks when using a HDMI monitor in openSUSE Leap 15.2. It worked fine before that. It locks within a few minutes of starting a streaming video in Firefox, a bit longer in a Zoom session, and even longer if not streaming. Using the VGA monitor by itself, everything works correctly. After the freeze, the mouse pointer still moves, but nothing responds to clicks. If both monitors are enabled, they both freeze. When streaming, with frozen video, audio continues normally.

    With the system booted into Windows 10, there is no problem with the HDMI monitor.

Card is VisionTek Radeon™ 5450 2GB DDR3 (DVI-I, HDMI, VGA)

    System information is:

howard@HP-oS15KDE:~> inxi -F
System:    Host: HP-oS15KDE Kernel: 5.3.18-lp152.36-default x86_64 bits: 64 Desktop: KDE Plasma 5.18.5
           Distro: openSUSE Leap 15.2
Machine:   Type: Desktop Mobo: Gigabyte model: GA-78LMT-USB3 6.0 v: x.x serial: <superuser/root required> BIOS: Award v: F2
           date: 11/25/2014
CPU:       Topology: Quad Core model: AMD FX-4300 bits: 64 type: MCP L2 cache: 2048 KiB
           Speed: 1397 MHz min/max: 1400/3800 MHz Core speeds (MHz): 1: 3888 2: 3183 3: 1518 4: 1710
Graphics:  Device-1: Advanced Micro Devices [AMD/ATI] Cedar [Radeon HD 5000/6000/7350/8350 Series] driver: radeon v: kernel
           Display: x11 server: X.Org 1.20.3 driver: ati,radeon unloaded: fbdev,modesetting,vesa resolution: 1: 1920x1080
           2: 1280x1024~60Hz
           OpenGL: renderer: AMD CEDAR (DRM 2.50.0 / 5.3.18-lp152.36-default LLVM 9.0.1) v: 3.3 Mesa 19.3.4
Audio:     Device-1: Advanced Micro Devices [AMD/ATI] SBx00 Azalia driver: snd_hda_intel
           Device-2: Advanced Micro Devices [AMD/ATI] Cedar HDMI Audio [Radeon HD 5400/6300/7300 Series] driver: snd_hda_intel
           Sound Server: ALSA v: k5.3.18-lp152.36-default
Network:   Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet driver: r8168
           IF: eth0 state: up speed: 1000 Mbps duplex: full mac: hidden
           IF-ID-1: tun0 state: unknown speed: 10 Mbps duplex: full mac: N/A
Drives:    Local Storage: total: 931.52 GiB used: 269.23 GiB (28.9%)
           ID-1: /dev/sda vendor: Seagate model: ST3750640NS size: 698.64 GiB
           ID-2: /dev/sdb vendor: Seagate model: ST3250620AS size: 232.89 GiB
Partition: ID-1: / size: 29.40 GiB used: 9.66 GiB (32.9%) fs: ext4 dev: /dev/sda5
           ID-2: /home size: 9.78 GiB used: 5.87 GiB (60.0%) fs: ext4 dev: /dev/sda6
Swap:      ID-1: swap-1 type: partition size: 16.00 GiB used: 0 KiB (0.0%) dev: /dev/sda8
Sensors:   System Temperatures: cpu: 20.4 C mobo: N/A gpu: radeon temp: 53 C
           Fan Speeds (RPM): N/A
Info:      Processes: 254 Uptime: N/A Memory: 7.75 GiB used: 2.02 GiB (26.1%) Shell: bash inxi: 3.1.00

    What might be happening here?