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

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Message-ID: <20210225101506.GA17499@duo.ucw.cz>
Date:   Thu, 25 Feb 2021 11:15:06 +0100
From:   Pavel Machek <pavel@....cz>
To:     Thomas Zimmermann <tzimmermann@...e.de>
Cc:     intel-gfx@...ts.freedesktop.org,
        kernel list <linux-kernel@...r.kernel.org>,
        dri-devel@...ts.freedesktop.org, rodrigo.vivi@...el.com,
        airlied@...hat.com, sean@...rly.run
Subject: Re: udldrm does not recover from powersave? Re: udldrmfb: causes
 WARN in i915 on X60 (x86-32)

Hi!

> > 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?
> 
> Did it work before the regression?

I don't know. I'm trying to get it to work, I basically did not use it before.

> For testing, could you please remove the fix and then do
> 
>   git revert 6eb0233ec2d0
> 
> This would restore the old version. Please report back on the results.

I doubt this is related, but I can try.

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

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