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Monq
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Joined: 11 Feb 2011
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Location: Spain
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 Posted: Wed Mar 20, 2019 11:47 am Post subject: Screen not waking up after suspending |
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| After I suspend my computer with pm-suspend and wake it up, my monitor never wakes up. Where can I start looking to try to debug it? |
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Verdazil
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Joined: 14 Feb 2019
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Location: One small country ...
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| Posted: Wed Mar 20, 2019 11:54 am Post subject: Re: Screen not waking up after suspending |
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| Monq wrote: | | After I suspend my computer with pm-suspend and wake it up, my monitor never wakes up. Where can I start looking to try to debug it? |
Such problems are usually associated with improper operation of video drivers. What is your videocard and what driver is used?
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Zucca
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Location: Rasi, Finland
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| Posted: Wed Mar 20, 2019 12:00 pm Post subject: |
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I remember having similar problem some time back...
Try ctrl+alt+F<n> to change to virtual terminal. Then switch back to your graphical session.
If that works you can create a suspend-hook-script which uses chvt for example to switch back and forth after waking from suspend. It's ugly, I know. There might be better way to "refresh" graphical session.
But first you should test if changing to virtual terminal and back works.
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Monq
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Joined: 11 Feb 2011
Posts: 41
Location: Spain
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| Posted: Wed Mar 20, 2019 12:03 pm Post subject: Re: Screen not waking up after suspending |
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| Verdazil wrote: | | Monq wrote: | | After I suspend my computer with pm-suspend and wake it up, my monitor never wakes up. Where can I start looking to try to debug it? |
Such problems are usually associated with improper operation of video drivers. What is your videocard and what driver is used? |
I've got an AMD R9 290 and I'm using the amdgpu driver.
| Zucca wrote: | I remember having similar problem some time back...
Try ctrl+alt+F<n> to change to virtual terminal. Then switch back to your graphical session.
If that works you can create a suspend-hook-script which uses chvt for example to switch back and forth after waking from suspend. It's ugly, I know. There might be better way to "refresh" graphical session.
But first you should test if changing to virtual terminal and back works. |
It happens even if I haven't started Xorg yet, this is, even if I'm only using a tty. So I assume it's got nothing to do with Xorg. |
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Zucca
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Location: Rasi, Finland
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| Posted: Wed Mar 20, 2019 12:19 pm Post subject: Re: Screen not waking up after suspending |
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| Monq wrote: | | It happens even if I haven't started Xorg yet, this is, even if I'm only using a tty. So I assume it's got nothing to do with Xorg. |
I never got suspend to propely working if not inside graphical session. The screen(s) always remained black if I tried to suspend from vt.
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Monq
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Location: Spain
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| Posted: Wed Mar 20, 2019 12:21 pm Post subject: Re: Screen not waking up after suspending |
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| Zucca wrote: | | I never got suspend to propely working if not inside graphical session. The screen(s) always remained black if I tried to suspend from vt. |
The same thing happens if I suspend and wake up inside Xorg. In any case I expect suspend to work fine using a tty too. |
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Zucca
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| Posted: Wed Mar 20, 2019 12:25 pm Post subject: |
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But did switching the vt do anything?
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Monq
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Joined: 11 Feb 2011
Posts: 41
Location: Spain
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| Posted: Wed Mar 20, 2019 12:25 pm Post subject: |
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Okay, so... the problem went away after updating to Linux 5.0.3. Now my computer wakes up properly both in a tty and in Xorg. Case closed. :-)
Thanks for your help. |
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