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Author SHA1 Message Date
Olivier Fourdan
4252aaedb7 xkb: Fix buffer overflow in XkbVModMaskText() 
The code in XkbVModMaskText() allocates a fixed sized buffer on the
stack and copies the virtual mod name.

There's actually two issues in the code that can lead to a buffer
overflow.

First, the bound check mixes pointers and integers using misplaced
parenthesis, defeating the bound check.

But even though, if the check fails, the data is still copied, so the
stack overflow will occur regardless.

Change the logic to skip the copy entirely if the bound check fails.

CVE-2025-26595, ZDI-CAN-25545

This vulnerability was discovered by:
Jan-Niklas Sohn working with Trend Micro Zero Day Initiative

Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1828>
(cherry picked from commit 11fcda8753)
 2026-01-25 10:40:00 -08:00
Peter Hutterer
077944f99e dix: keep a ref to the rootCursor 
CreateCursor returns a cursor with refcount 1 - that refcount is used by
the resource system, any caller needs to call RefCursor to get their own
reference. That happens correctly for normal cursors but for our
rootCursor we keep a variable to the cursor despite not having a ref for
ourselves.

Fix this by reffing/unreffing the rootCursor to ensure our pointer is
valid.

Related to CVE-2025-26594, ZDI-CAN-25544

Reviewed-by: Olivier Fourdan <ofourdan@redhat.com>
(cherry picked from commit b0a09ba602)

Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1830>
 2026-01-25 10:40:00 -08:00
Olivier Fourdan
fb6dd658d7 Cursor: Refuse to free the root cursor 
If a cursor reference count drops to 0, the cursor is freed.

The root cursor however is referenced with a specific global variable,
and when the root cursor is freed, the global variable may still point
to freed memory.

Make sure to prevent the rootCursor from being explicitly freed by a
client.

CVE-2025-26594, ZDI-CAN-25544

This vulnerability was discovered by:
Jan-Niklas Sohn working with Trend Micro Zero Day Initiative

v2: Explicitly forbid XFreeCursor() on the root cursor (Peter Hutterer
<peter.hutterer@who-t.net>)
v3: Return BadCursor instead of BadValue (Michel Dänzer
<michel@daenzer.net>)

Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
Suggested-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1828>
(cherry picked from commit 01642f263f)
 2026-01-25 10:40:00 -08:00
Jan Engelhardt
e140707ade glamor: explicitly draw endpoints of line segments 
The OpenGL 4.6 specification §14.5.1 "Basic Line Rasterization"
figure 14.2 says:

"""A diamond shaped region of height 1 is placed around each fragment
center; those regions that the line segment **exits** cause
rasterization to produce corresponding fragments."""

As the line does not necessarily exit the last diamond,
it is necessary to explicitly paint a pixel at line ends.

Fixes: https://gitlab.freedesktop.org/xorg/xserver/-/issues/1434
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1755>
(cherry picked from commit 530e80375e)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
7fe8901653 drop not needed includes of geext.h 
Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1810>
(cherry picked from commit 1fc9a26afd)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
72803d8ad3 Xext: dpms: need to include geext.h 
It's calling GERegisterExtension(), which is defined in geext.h

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1810>
(cherry picked from commit a955b83848)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
d88ffb69b4 present: need to include geext.h 
It's calling GERegisterExtension(), which is defined in geext.h

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1810>
(cherry picked from commit ce1f0c9375)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
ab1a65e563 dbe: fix byte swapping in SProcDbeSwapBuffers() 
The loop forgot to move the SwapInfo pointer, so the same list entry
gets swapped over and over again, while the remaining ones get ignored.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1822>
(cherry picked from commit 86244ff36f)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
ce86a7c622 present: fix prototype for present_select_input() 
Wants XID instead of CARD32 for 2nd parameter.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1809>
(cherry picked from commit b664b44869)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
92107b5803 Xext: geext.h: fix missing include of Xfuncproto.h 
Needed for _X_EXPORT.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1811>
(cherry picked from commit 658f1b34ee)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
5c8656e4cb Xext: geext: move struct _GEExtension into geext.c 
Not used anywhere outside geext implementation itself,
so shouldn't be public at all.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1811>
(cherry picked from commit a7600ac884)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
c0161d21c2 Xext: geext: unexport GEExtensions[] 
This field isn't used by anybody outside, nor should it be accessed
directly. So better make it local.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1811>
(cherry picked from commit 896937298b)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
88d6286897 Xext: geext: drop unused GEV() macro 
Not used anywhere, so no need to keep it around any longer.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1811>
(cherry picked from commit 480a7e4b11)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
0c91df7c3f Xext: geext: drop unused GEEXT() macro 
Not used by anybody, so no need to keep it around any longer.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1811>
(cherry picked from commit ae7bbd36df)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
9a071c97f4 Xext: geext: drop unused GEEXTIDX() macro 
Not used anywhere, so no need to keep it around any longer.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1811>
(cherry picked from commit b865f44f5e)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
98efb4746a Xext: geext: drop unused GEMaskIsSet() macro 
Not used anywhere, so no need to keep it around any longer.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1811>
(cherry picked from commit 1006a37f7d)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
3d6bfe8b1f Xext: geext: drop unused GECLIENT() macro 
Not used anywhere, so no need to keep it around any longer.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1811>
(cherry picked from commit c1d49e19b9)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
8735cbcd9e Xext: geext: drop unused GEIsType() macro 
Not used anywhere, so no need to keep it around any longer.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1811>
(cherry picked from commit 01ad88b8c8)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
a3a8e04ab8 Xext: geext: drop unused GEEventFill() macro 
It's not used anywhere, so no need to keep it around any longer.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1811>
(cherry picked from commit bdb5d4867a)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
0d24538c6d xwin: don't need NULL check before free() 
free() is safe against NULL arguments.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1818>
(cherry picked from commit 573d70ae25)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
7ab9e87cbd glamor: don't need NULL check before free() 
free() is safe against NULL arguments.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1818>
(cherry picked from commit eafec5836a)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
b0f1885019 present: need to include <X11/Xfuncproto.h> 
Some headers making use of X_EXPORT macro, so Xfuncproto.h should be
included explicitly, instead of silently relying any other include
already doing that.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1813>
(cherry picked from commit 7ca8c1518c)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
09f7a0303f present: need to include dix-config.h 
dix-config.h always needs to be included first, otherwise things
can get messed up in really obscure ways, eg. certain types silently
changing in size and causing mysterious crashes.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1813>
(cherry picked from commit b55d726a7b)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
531e6c115f meson.build: enable VLA warning 
variable length arrays can be dangerous, so better don't use
them at all.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1819>
(cherry picked from commit 2e6f3a632b)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
4c0cb01506 test: sync: don't use VLA 
The array size is fixed anyways, so we can use a symbol instead
of variable.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1819>
(cherry picked from commit b4f0c1abd5)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
dc2df95385 xfree86: modesetting: don't use VLA 
even through this specific case is correct and safe, it's safer to
remove all VLA usages and forbid them completely by compiler flag.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1819>
(cherry picked from commit f894801fa2)
 2026-01-25 10:40:00 -08:00
Doug Brown
0fcef31fd8 dri2: Protect against dri2ClientPrivate assertion failures 
If DRI2ScreenInit hasn't been called yet, DRI2Authenticate and
DRI2CreateDrawable2 cause the X server to crash. This has been observed
to happen on multiple modern Linux distros in various conditions,
including QEMU and VMware VMs. Make these functions more robust in order
to prevent the crash.

This patch was originally provided by Bernhard Übelacker and expanded
upon by Mark Wagner.

Signed-off-by: Doug Brown <doug@schmorgal.com>
Closes: https://gitlab.freedesktop.org/xorg/xserver/-/issues/1053
Closes: https://gitlab.freedesktop.org/xorg/xserver/-/issues/1534
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1608>
(cherry picked from commit a0834009cf)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
75105fae65 ci: update freebsd builder image 
FreeBSD upstream removed image for 14.0 image, so we need to update.
Also increasing image size, since the new images are too small.
(needs update of ci-templates)

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1784>
(cherry picked from commit 6ec89c91f3)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
a1be877d43 xfree86: doc: update docs on XF86ModuleData 
Even though the order of these fields shouldn't change anytime
soon, it's still better programming style to name'em explicitly.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1788>
(cherry picked from commit 80f5d29c84)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
511243a4c1 xfree86: inputtest: use explicit field initializers for XF86ModuleData 
Even though the order of these fields shouldn't change anytime
soon, it's still better programming style to name'em explicitly.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1788>
(cherry picked from commit e88762896e)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
001df8ad29 xfree86: modsetting: use explicit field initializers for XF86ModuleData 
Even though the order of these fields shouldn't change anytime
soon, it's still better programming style to name'em explicitly.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1788>
(cherry picked from commit 2a10eff6c5)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
20bd82e972 xfree86: exa: use explicit field initializers for XF86ModuleData 
Even though the order of these fields shouldn't change anytime
soon, it's still better programming style to name'em explicitly.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1788>
(cherry picked from commit c8ad9c6567)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
6775511085 xfree86: fbdevhw: use explicit field initializers for XF86ModuleData 
Even though the order of these fields shouldn't change anytime
soon, it's still better programming style to name'em explicitly.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1788>
(cherry picked from commit c862cf3c3a)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
eaabd43c7e xfree86: xf86int10module: use explicit field initializers for XF86ModuleData 
Even though the order of these fields shouldn't change anytime
soon, it's still better programming style to name'em explicitly.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1788>
(cherry picked from commit d87e93bf40)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
81a42ac3b8 xfree86: xfbmodule: use explicit field initializers for XF86ModuleData 
Even though the order of these fields shouldn't change anytime
soon, it's still better programming style to name'em explicitly.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1788>
(cherry picked from commit f54993a222)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
2f5fba159c xfree86: vgaHWmodule: use explicit field initializers for XF86ModuleData 
Even though the order of these fields shouldn't change anytime
soon, it's still better programming style to name'em explicitly.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1788>
(cherry picked from commit a2e20304e0)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
e2738f3790 xfree86: shmodule: use explicit field initializers for XF86ModuleData 
Even though the order of these fields shouldn't change anytime
soon, it's still better programming style to name'em explicitly.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1788>
(cherry picked from commit 3066125bec)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
5722da8f4b xfree86: sfbmodule: use explicit field initializers for XF86ModuleData 
Even though the order of these fields shouldn't change anytime
soon, it's still better programming style to name'em explicitly.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1788>
(cherry picked from commit f0590decb6)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
9ac862ff82 xfree86: glxmodule: use explicit field initializers for XF86ModuleData 
Even though the order of these fields shouldn't change anytime
soon, it's still better programming style to name'em explicitly.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1788>
(cherry picked from commit 03becba76b)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
81e39745f9 xfree86: fbmodule: use explicit field initializers for XF86ModuleData 
Even though the order of these fields shouldn't change anytime
soon, it's still better programming style to name'em explicitly.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1788>
(cherry picked from commit 7dd8d0627c)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
187b82e956 glamor: use explicit field initializers for XF86ModuleData 
Even though the order of these fields shouldn't change anytime
soon, it's still better programming style to name'em explicitly.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1788>
(cherry picked from commit c46e645bad)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
010a5fb420 xfree86: xf86configure: use NULL instead of 0 
Zero pointers should be initialized w/ NULL instead of raw 0.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1788>
(cherry picked from commit 1848027892)
 2026-01-25 10:40:00 -08:00
Alan Coopersmith
043b68040b ci: update XTS to a commit that doesn't require -fcommon workaround 
xorg/test/xts!10 fixed XTS to build with recent gcc without adding -fcommon

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1786>
(cherry picked from commit 9af363b046)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
307f1afe31 doc: drop removed PaintWindowBackground() and PaintWindowBorder() 
These have been removed 1.5 decades ago.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1785>
(cherry picked from commit f209ac2014)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
5f0b547522 dri: report failed memory allocation 
ProcXF86DRIGetDrawableInfo() should report failed memory allocation instead
of pretending everything's okay.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1797>
(cherry picked from commit 94d942267a)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
e2b88e3143 modsetting: also add libglx to library symbol test 
Increase test coverage a bit.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1798>
(cherry picked from commit 2539ddae50)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
67fbb2b1b9 xfree86: os-support: unexport xf86scanpci() 
Not used by any drivers/modules, so no need to keep it exported.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1800>
(cherry picked from commit e10283d842)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
9d5cbe76ef os: no need to defined PATH_MAX 
All our supported platforms define it, so no need to do
it on our own.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1803>
(cherry picked from commit 9dc26f6743)
 2026-01-25 10:40:00 -08:00
Enrico Weigelt, metux IT consult
10b8cd6481 os: drop upstart specific SIGSTOP signaling logic 
Upstart is long dead, discontinued a decade ago, so there's no
need to keep around a special signaling logic just for it.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1791>
(cherry picked from commit 6c24e53a89)
 2026-01-25 10:40:00 -08:00
Andy Myers
39a67e9e03 xvfb: Add multiple CRTC support 
Multiple CRTCs can be added on a per-screen basis with the new -crtcs
option. Each CRTC has one associated output. Outputs beyond the first
are disabled by default and can be enabled by setting a mode. Outputs
can be disabled again by setting the associated CRTC's mode and output
to None.

Signed-off-by: Andy Myers <andy.myers@zetier.com>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1749>
(cherry picked from commit 7933cc24d0)
 2026-01-25 10:40:00 -08:00