linux-kernel - udldrm does not recover from powersave? Re: udldrmfb: causes WARN in i915 on X60 (x86-32)

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Message-ID: <20210225095322.GA5089@amd>
Date:   Thu, 25 Feb 2021 10:53:22 +0100
From:   Pavel Machek <pavel@....cz>
To:     Thomas Zimmermann <tzimmermann@...e.de>
Cc:     kernel list <linux-kernel@...r.kernel.org>,
        jani.nikula@...ux.intel.com, joonas.lahtinen@...ux.intel.com,
        rodrigo.vivi@...el.com, intel-gfx@...ts.freedesktop.org,
        airlied@...hat.com, sean@...rly.run,
        dri-devel@...ts.freedesktop.org
Subject: udldrm does not recover from powersave? Re: udldrmfb: causes WARN in
 i915 on X60 (x86-32)

Hi!

> >This is in -next, but I get same behaviour on 5.11; and no, udl does
> 
> Thanks for reporting. We are in the process of fixing the issue. The latest
> patch is at [1].
>

Thank you, that fixes the DMA issue, and I can use the udl.

...for a while. Then screensaver blanks laptop screen, udl screen
blanks too. Upon hitting a key, internal screen shows up, udl does
not.

I try rerunning xrandr ... --auto, but could not recover it.

Any ideas?

Best regards,
								Pavel
-- 
http://www.livejournal.com/~pavelmachek

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