* thinkpad x1 carbon display flickering after update to 5.12. good on 5.11.x (i915) @ 2021-05-14 8:24 Thomas Stein 2021-05-14 12:34 ` Oleksandr Natalenko 0 siblings, 1 reply; 3+ messages in thread From: Thomas Stein @ 2021-05-14 8:24 UTC (permalink / raw) To: linux-kernel Hello Devs. 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? cheers, t. ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: thinkpad x1 carbon display flickering after update to 5.12. good on 5.11.x (i915) 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 2021-05-14 13:44 ` Thomas Stein 0 siblings, 1 reply; 3+ messages in thread From: Oleksandr Natalenko @ 2021-05-14 12:34 UTC (permalink / raw) To: Thomas Stein Cc: linux-kernel, Kai-Heng Feng, Ville Syrjälä, Jani Nikula, Joonas Lahtinen, Rodrigo Vivi, David Airlie, Daniel Vetter, Imre Deak, Manasi Navare, Lyude Paul, Ankit Nautiyal, Lucas De Marchi, Sean Paul, intel-gfx, dri-devel 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) ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: thinkpad x1 carbon display flickering after update to 5.12. good on 5.11.x (i915) 2021-05-14 12:34 ` Oleksandr Natalenko @ 2021-05-14 13:44 ` Thomas Stein 0 siblings, 0 replies; 3+ messages in thread From: Thomas Stein @ 2021-05-14 13:44 UTC (permalink / raw) To: Oleksandr Natalenko Cc: linux-kernel, Kai-Heng Feng, Ville Syrjälä, Jani Nikula, Joonas Lahtinen, Rodrigo Vivi, David Airlie, Daniel Vetter, Imre Deak, Manasi Navare, Lyude Paul, Ankit Nautiyal, Lucas De Marchi, Sean Paul, intel-gfx, dri-devel 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 ^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2021-05-14 13:45 UTC | newest] Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 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 2021-05-14 13:44 ` Thomas Stein
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