Doing more testing, and now that I see this "feature" disabled, I don't think it always turned off the monitor. Looks like half of the time linux-image-5.4.0-33-generic failed to turn it off, but it still did NOT hang the entire system like linux-image-5.4.0-37-generic does.
Monitor details $ sudo get-edid | parse-edid This is read-edid version 3.0.2. Prepare for some fun. Attempting to use i2c interface No EDID on bus 1 No EDID on bus 2 No EDID on bus 3 No EDID on bus 4 No EDID on bus 5 No EDID on bus 6 No EDID on bus 7 No EDID on bus 8 2 potential busses found: 0 9 Will scan through until the first EDID is found. Pass a bus number as an option to this program to go only for that one. Bus 0 doesn't really have an EDID... 128-byte EDID successfully retrieved from i2c bus 9 Looks like i2c was successful. Have a good day. Checksum Correct Section "Monitor" Identifier "DELL S2409W" ModelName "DELL S2409W" VendorName "DEL" # Monitor Manufactured week 22 of 2009 # EDID version 1.3 # Digital Display DisplaySize 530 300 Gamma 2.20 Option "DPMS" "true" Horizsync 30-83 VertRefresh 50-76 # Maximum pixel clock is 170MHz #Not giving standard mode: 1152x864, 75Hz #Not giving standard mode: 1280x1024, 60Hz #Not giving standard mode: 1920x1080, 60Hz Modeline "Mode 0" 148.50 1920 2008 2052 2200 1080 1084 1089 1125 +hsync +vsync EndSection -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1883472 Title: linux-image-5.4.0-37-generic freezes on idle. linux- image-5.4.0-33-generic works fine. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed/+bug/1883472/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs