[Bug 99841] Switching to VT freezes X only on a dual screen

[Bug 99841] Switching to VT freezes X only on a dual screen

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=99841

Michel Dänzer <michel@daenzer.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|Driver/nouveau              |DRM/other
            Product|xorg                        |DRI
         QA Contact|xorg-team@lists.x.org       |
           Assignee|nouveau@lists.freedesktop.o |dri-devel@lists.freedesktop
                   |rg                          |.org

--- Comment #9 from Michel Dänzer <michel@daenzer.net> ---
This also happens with other drivers, seems to be a core DRM issue.

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[Bug 99841] Switching to VT freezes X only on a dual screen

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https://bugs.freedesktop.org/show_bug.cgi?id=99841

--- Comment #10 from Elimar Riesebieter <riesebie@lxtec.de> ---
There is no change in 4.11-rc1

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[Bug 99841] Switching to VT freezes X only on a dual screen

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https://bugs.freedesktop.org/show_bug.cgi?id=99841

--- Comment #11 from Michel Dänzer <michel@daenzer.net> ---
Somebody needs to bisect this between 4.9 and 4.10-rc1.

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[Bug 99841] Switching to VT freezes X only on a dual screen

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https://bugs.freedesktop.org/show_bug.cgi?id=99841

--- Comment #12 from prg@cooco.de ---
# bad: [7ce7d89f48834cefece7804d38fc5d85382edf77] Linux 4.10-rc1
# good: [69973b830859bc6529a7a0468ba0d80ee5117826] Linux 4.9
git bisect start 'v4.10-rc1' 'v4.9'
# bad: [72cca7baf4fba777b8ab770b902cf2e08941773f] Merge tag 'staging-4.10-rc1'
of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
git bisect bad 72cca7baf4fba777b8ab770b902cf2e08941773f
# good: [b8d2798f32785398fcd1c48ea80c0c6c5ab88537] Merge tag 'clk-for-linus' of
git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux
git bisect good b8d2798f32785398fcd1c48ea80c0c6c5ab88537
# bad: [9439b3710df688d853eb6cb4851256f2c92b1797] Merge tag 'drm-for-v4.10' of
git://people.freedesktop.org/~airlied/linux
git bisect bad 9439b3710df688d853eb6cb4851256f2c92b1797
# bad: [628d16555e019c0cc6897b603bbea29c3b6d2c9f] Merge tag
'imx-drm-next-2016-11-10' of git://git.pengutronix.de/git/pza/linux into
drm-next
git bisect bad 628d16555e019c0cc6897b603bbea29c3b6d2c9f
# bad: [3f767e3d076dd2a24a614917c8f0b05d8d82b90b] drm/amdgpu: just not load smc
firmware if smu is already running
git bisect bad 3f767e3d076dd2a24a614917c8f0b05d8d82b90b
# good: [bf9d99ad17ff3d85dc8c807063f76560587d983a] drm/i915/gen9: Make
skl_pipe_wm_get_hw_state() reusable
git bisect good bf9d99ad17ff3d85dc8c807063f76560587d983a
# bad: [9405e47dbab33706c43caba72cf8d83b5746f843] drm/amdgpu/virtual_dce: clean
up interrupt handling
git bisect bad 9405e47dbab33706c43caba72cf8d83b5746f843
# bad: [d138dd3c0c70979215f3184cf36f95875e37932e] drm: Add support for optional
per-plane rotation property
git bisect bad d138dd3c0c70979215f3184cf36f95875e37932e
# bad: [9edbf1fa600a2ef17c7553c2103d0055d0320d15] drm: Add API for capturing
frame CRCs
git bisect bad 9edbf1fa600a2ef17c7553c2103d0055d0320d15
# good: [f7741aa75e76440f4e9ecfe512feebe9bce33ca8] drm/savage: dereferencing an
error pointer
git bisect good f7741aa75e76440f4e9ecfe512feebe9bce33ca8
# good: [6dffd431e2296cda08e7e4f0242e02df1d1698cd] drm: Add aspect ratio
parsing in DRM layer
git bisect good 6dffd431e2296cda08e7e4f0242e02df1d1698cd
# good: [f14f368670541bfa217573194027a58f2206e250] drm/edid: Rename local
variable block to edid
git bisect good f14f368670541bfa217573194027a58f2206e250
# bad: [865afb11949e5bf4bb32d9a2aa9867c1ac4d8da0] drm/fb-helper: reject any
changes to the fbdev
git bisect bad 865afb11949e5bf4bb32d9a2aa9867c1ac4d8da0
# good: [a28187ccab9410cad20e8808f00cfc07f99649c3] drm/edid: Use block local to
refer to the block
git bisect good a28187ccab9410cad20e8808f00cfc07f99649c3
# first bad commit: [865afb11949e5bf4bb32d9a2aa9867c1ac4d8da0] drm/fb-helper:
reject any changes to the fbdev

(Tested on a GTX660/GK106)

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[Bug 99841] Switching to VT freezes X only on a dual screen

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=99841

--- Comment #13 from Michel Dänzer <michel@daenzer.net> ---
Created attachment 130207
  --> https://bugs.freedesktop.org/attachment.cgi?id=130207&action=edit
Only reject if FBINFO_MISC_USEREVENT is set

Does this patch (only compile tested) help?

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[Bug 99841] Switching to VT freezes X only on a dual screen

[bugzilla-daemon]

[-- Attachment #1.1: Type: text/plain, Size: 269 bytes --]

https://bugs.freedesktop.org/show_bug.cgi?id=99841

--- Comment #14 from kevin@potatofrom.space ---
The patch indeed solves the issue -- VTs work on Linux 4.10.1 with the patch
applied.

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[Bug 99841] Switching to VT freezes X only on a dual screen

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[-- Attachment #1.1: Type: text/plain, Size: 647 bytes --]

https://bugs.freedesktop.org/show_bug.cgi?id=99841

--- Comment #15 from Elimar Riesebieter <riesebie@lxtec.de> ---
The patch applied to 4.10.2 works just fine. Applying to 4.11-rc2 gives a
compile error:

drivers/gpu/drm/drm_fb_helper.c: In function ‘drm_fb_helper_check_var’:         
  drivers/gpu/drm/drm_fb_helper.c:1263:32: error: ‘struct drm_framebuffer’ has
no member named ‘bits_per_pixel’
        (var->bits_per_pixel != fb->bits_per_pixel ||
                                  ^~
make[5]: *** [drivers/gpu/drm/drm_fb_helper.o] Error 1

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[Bug 99841] Switching to VT freezes X only on a dual screen

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https://bugs.freedesktop.org/show_bug.cgi?id=99841

--- Comment #16 from Michel Dänzer <michel@daenzer.net> ---
Created attachment 130227
  --> https://bugs.freedesktop.org/attachment.cgi?id=130227&action=edit
Patch for 4.11

Here's the corresponding patch for 4.11. Elimar, please test this as well.

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[Bug 99841] Switching to VT freezes X only on a dual screen

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https://bugs.freedesktop.org/show_bug.cgi?id=99841

--- Comment #17 from Elimar Riesebieter <riesebie@lxtec.de> ---
Thanks Michel for your efforts. Hereby I confirm that your patch against 4.11
works fine as well ;-)

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[Bug 99841] Switching to VT freezes X only on a dual screen

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https://bugs.freedesktop.org/show_bug.cgi?id=99841

--- Comment #18 from Joseph Thommes <joseph-thommes@gmx.de> ---
The patch also solves the problem for me on 4.10.2-gentoo.
Thank You.

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[Bug 99841] Switching to VT freezes X only on a dual screen

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https://bugs.freedesktop.org/show_bug.cgi?id=99841

--- Comment #19 from Peter Mattern <pmattern@arcor.de> ---
The patch is fixing the problem on an ATI system as well here (Radeon HD 7480D
/ APU A4-5300, Arch Linux, kernel 4.10.{1-3}).

Is there any way to track when it will be included in mainline?

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[Bug 99841] Switching to VT freezes X only on a dual screen

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https://bugs.freedesktop.org/show_bug.cgi?id=99841

--- Comment #20 from Jari Tahvanainen <jari.tahvanainen@intel.com> ---
Michel and others - landed to drm-tip. Ready for resolved+fixed ? Or even
verified...
commit 12ffed96d4369f086261ba2ee734fa8c932d7f55
Author:     Michel Dänzer <michel.daenzer@amd.com>
AuthorDate: Thu Mar 23 17:53:26 2017 +0900
Commit:     Daniel Vetter <daniel.vetter@ffwll.ch>
CommitDate: Thu Mar 23 15:12:07 2017 +0100

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[Bug 99841] Switching to VT freezes X only on a dual screen

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https://bugs.freedesktop.org/show_bug.cgi?id=99841

--- Comment #21 from Michel Dänzer <michel@daenzer.net> ---
If people are okay with that before it lands in 4.10.y, sure.

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[Bug 99841] Switching to VT freezes X only on a dual screen

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[-- Attachment #1.1: Type: text/plain, Size: 553 bytes --]

https://bugs.freedesktop.org/show_bug.cgi?id=99841

Elimar Riesebieter <riesebie@lxtec.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |riesebie@lxtec.de

--- Comment #22 from Elimar Riesebieter <riesebie@lxtec.de> ---
I am running 4.10.6 patched with Michel's patch. There are no problems
switching to vt's and back.

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[Bug 99841] Switching to VT freezes X only on a dual screen

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https://bugs.freedesktop.org/show_bug.cgi?id=99841

mattia.b89 <mattia.b89@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|NEW                         |RESOLVED

--- Comment #23 from mattia.b89 <mattia.b89@gmail.com> ---
I cannot reproduce it.

That patch has already been merged upstream, maybe?

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