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I've been having this strange problem with my dual monitor setup. |
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While I've figured out the nightmare of auto-detect not working at all |
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with dual monitors and the inability to use nvidia's configure tool |
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combined with Plasma's monitor option to fix the problem I've switched |
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to nouveau and at least it is consistent now and not messing up my |
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windows and randomly disconnecting. |
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|
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However, I still have one problem which is getting annoying. DPMS does |
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not work automatically like it should. It says for the monitors the |
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capabilities are off. But then it enables it (but it doesn't - xset |
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shows everything disabled - first two lines are monitors and the last |
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one is a general message saying it's enabled.) |
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|
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$ grep -i dpms /var/log/Xorg.0.log |
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[ 6.087] (II) modeset(0): DPMS capabilities: Off |
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[ 6.156] (II) modeset(0): DPMS capabilities: Off |
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[ 6.174] (==) modeset(0): DPMS enabled |
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[ 6.174] (II) Initializing extension DPMS |
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|
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Now I can run xset dpms 300 450 600 and only then xset shows it as set: |
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|
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$ xset q |
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Keyboard Control: |
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auto repeat: on key click percent: 0 LED mask: 00000002 |
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XKB indicators: |
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00: Caps Lock: off 01: Num Lock: on 02: Scroll Lock: off |
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03: Compose: off 04: Kana: off 05: Sleep: off |
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06: Suspend: off 07: Mute: off 08: Misc: off |
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09: Mail: off 10: Charging: off 11: Shift Lock: off |
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12: Group 2: off 13: Mouse Keys: off |
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auto repeat delay: 600 repeat rate: 25 |
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auto repeating keys: 00ffffffdffffbbf |
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fadfffefffedffff |
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9fffffffffffffff |
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fff7ffffffffffff |
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bell percent: 50 bell pitch: 400 bell duration: 100 |
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Pointer Control: |
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acceleration: 2/1 threshold: 4 |
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Screen Saver: |
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prefer blanking: yes allow exposures: yes |
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timeout: 0 cycle: 600 |
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Colors: |
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default colormap: 0x20 BlackPixel: 0x0 WhitePixel: 0xffffff |
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Font Path: |
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/usr/share/fonts/misc,/usr/share/fonts/75dpi,built-ins |
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DPMS (Display Power Management Signaling): |
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Standby: 300 Suspend: 450 Off: 600 |
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DPMS is Enabled |
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Monitor is On |
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|
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However, while it does blank and turn off the screens it doesn't last. |
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Maybe 10 seconds later the screens turn back on. |
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|
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I can force it with xset to turn the monitors off immediately but same |
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results - after a short time the monitors turn back on. In the X logs |
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there is this: |
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|
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[ 449.529] (WW) EDID timing clock 408.29 exceeds claimed max 75MHz, fixing |
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|
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which makes me wonder if the EDID data is bad on the one monitor (a |
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Samsung monitor.) |
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|
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Does anyone know of a way to test this DPMS? I suppose I could try |
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unplugging the Samsung monitor to see if the problem goes away? One |
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thing that may make a difference is that the Samsung is HDMI and the |
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other monitor (MSI) is DP. |
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|
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However, both of these monitors worked find on my old computer (it was |
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really old, no UEFI support. |
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|
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Can anyone think of next steps? I'm running out of things to try... |
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|
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Dan |