From: Thomas Stein <himbeere@meine-oma.de>
To: Oleksandr Natalenko <oleksandr@natalenko.name>
Cc: David Airlie <airlied@linux.ie>,
Lucas De Marchi <lucas.demarchi@intel.com>,
linux-kernel@vger.kernel.org,
Manasi Navare <manasi.d.navare@intel.com>,
Kai-Heng Feng <kai.heng.feng@canonical.com>,
Sean Paul <seanpaul@chromium.org>,
dri-devel@lists.freedesktop.org,
Rodrigo Vivi <rodrigo.vivi@intel.com>,
Ankit Nautiyal <ankit.k.nautiyal@intel.com>,
intel-gfx@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 15:44:51 +0200 [thread overview]
Message-ID: <e41eba8500f731c979340fd810da203f@meine-oma.de> (raw)
In-Reply-To: <20210514123431.fqvaa437zlw7rq7j@spock.localdomain>
Yes, it does indeed! No flicker anymore. Thanks and cheers!
On 2021-05-14 14:34, Oleksandr Natalenko wrote:
> 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
prev parent reply other threads:[~2021-05-15 13:35 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1a6cf0a3dc8a2c6364265ad7249b76b1@meine-oma.de>
2021-05-14 12:34 ` thinkpad x1 carbon display flickering after update to 5.12. good on 5.11.x (i915) Oleksandr Natalenko
2021-05-14 13:44 ` Thomas Stein [this message]
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