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

Open Source and information security mailing list archives

Message-ID: <ece8d515-5de1-6303-e62e-8ab7bce61102@suse.de>
Date:   Fri, 26 Feb 2021 09:48:04 +0100
From:   Thomas Zimmermann <tzimmermann@...e.de>
To:     Pavel Machek <pavel@....cz>
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

Am 25.02.21 um 10:53 schrieb Pavel Machek:
> 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?

Seems unrelated. I tested for the issue with the last good revision and 
with the latest fix applied. I use Gnome/X11.

With both kernels, the udl adapter's display came back after suspending. 
So I'd attribute the problem to something else.

Best regards
Thomas

> 
> Best regards,
> 								Pavel
> 
> 
> _______________________________________________
> dri-devel mailing list
> dri-devel@...ts.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
> 

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer

Download attachment "OpenPGP_signature" of type "application/pgp-signature" (841 bytes)

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives