From: Oleksandr Natalenko <oleksandr@natalenko.name>
To: Thomas Stein <himbeere@meine-oma.de>
Cc: linux-kernel@vger.kernel.org,
"Kai-Heng Feng" <kai.heng.feng@canonical.com>,
"Ville Syrjälä" <ville.syrjala@linux.intel.com>,
"Jani Nikula" <jani.nikula@linux.intel.com>,
"Joonas Lahtinen" <joonas.lahtinen@linux.intel.com>,
"Rodrigo Vivi" <rodrigo.vivi@intel.com>,
"David Airlie" <airlied@linux.ie>,
"Daniel Vetter" <daniel@ffwll.ch>,
"Imre Deak" <imre.deak@intel.com>,
"Manasi Navare" <manasi.d.navare@intel.com>,
"Lyude Paul" <lyude@redhat.com>,
"Ankit Nautiyal" <ankit.k.nautiyal@intel.com>,
"Lucas De Marchi" <lucas.demarchi@intel.com>,
"Sean Paul" <seanpaul@chromium.org>,
intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org
Subject: Re: thinkpad x1 carbon display flickering after update to 5.12. good on 5.11.x (i915)
Date: Fri, 14 May 2021 14:34:31 +0200 [thread overview]
Message-ID: <20210514123431.fqvaa437zlw7rq7j@spock.localdomain> (raw)
In-Reply-To: <1a6cf0a3dc8a2c6364265ad7249b76b1@meine-oma.de>
Hello.
On Fri, May 14, 2021 at 10:24:26AM +0200, Thomas Stein wrote:
> After upgrading to linux 5.12 the display on my X1 Carbon Gen 2 starts to
> flicker. Well actually it seems to turn off and on again and again. Here a
> link to a video a person posted who has the same issue as me obviousely. https://linuxove.com/thinkpad-x1-carbon-gen-3-display-flickering-on-linux-kernel-5-12/
>
> This happens without having Xorg running too. So it can't be related to
> Xorg. The kernel boots and after a few seconds, the kernel messages scoll
> through, the flickering starts. Nothing special in dmesg.
>
> dmesg:
>
> himbeere@rather ~ $ dmesg | grep i915
> [ 0.713595] i915 0000:00:02.0: vgaarb: deactivate vga console
> [ 0.720280] i915 0000:00:02.0: vgaarb: changed VGA decodes:
> olddecodes=io+mem,decodes=io+mem:owns=io+mem
> [ 0.741494] i915 0000:00:02.0: [drm] Panel advertises DPCD backlight
> support, but VBT disagrees. If your backlight controls don't work try
> booting with i915.enable_dpcd_backlight=1. If your machine needs this,
> please file a _new_ bug report on drm/i915, see
> https://gitlab.freedesktop.org/drm/intel/-/wikis/How-to-file-i915-bugs for
> details.
> [ 1.864837] [drm] Initialized i915 1.6.0 20201103 for 0000:00:02.0 on
> minor 0
> [ 1.875907] fbcon: i915drmfb (fb0) is primary device
> [ 3.158255] i915 0000:00:02.0: [drm] fb0: i915drmfb frame buffer device
> himbeere@rather ~ $
>
> Downgrading to 5.11 solves the issue for me. Any ideas?
Does [1] fix your issue?
[1] https://cgit.freedesktop.org/drm-tip/patch/?id=acca7762eb71bc05a8f28d29320d193150051f79
--
Oleksandr Natalenko (post-factum)
next prev parent reply other threads:[~2021-05-14 12:34 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-14 8:24 thinkpad x1 carbon display flickering after update to 5.12. good on 5.11.x (i915) Thomas Stein
2021-05-14 12:34 ` Oleksandr Natalenko [this message]
2021-05-14 13:44 ` Thomas Stein
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