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Kishore Kadiyala efb3abddd4 modesetting: keep going if a modeset fails on EnterVT
There was a time when setting a mode on a CRTC would not depend on the
associated connector's state. If a mode had been set successfully once,
it would mean it would work later on.

This changed with the introduction of new connectors type that now
require a link training sequence (DP, HDMI 2.0), and that means that
some events may have happened while the X server was not master that
would then prevent the mode from successfully be restored to its
previous state.

This patch relaxes the requirement that all modes should be restored on
EnterVT, or the entire X-Server would go down by allowing modesets to
fail (with some warnings). If a modeset fails, the CRTC will be
disabled, and a RandR event will be sent for the desktop environment to
fix the situation as well as possible.

Additional patches might be needed to make sure that the user would
never be left with all screens black in some scenarios.

v2 (Martin Peres):
 - whitespace fixes
 - remove the uevent handling (it is done in a previous patch)
 - improve the commit message
 - reduce the size of the patch by not changing lines needlessly
 - return FALSE if one modeset fails in ignore mode
 - add comments/todos to explain why we do things
 - disable the CRTCs that failed the modeset

Signed-off-by: Kishore Kadiyala <kishore.kadiyala@intel.com>
Signed-off-by: Martin Peres <martin.peres@linux.intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Tested-by: Kishore Kadiyala <kishore.kadiyala@intel.com>
Closes: #1010
2020-09-25 16:13:56 +03:00
.gitlab-ci gitlab-ci: Install libnvidia-egl-wayland-dev package 2020-01-06 15:52:33 +01:00
composite Fix spelling/wording issues 2020-07-05 13:07:33 -07:00
config linux: Fix platform device probe for DT-based PCI 2020-07-28 16:14:55 +08:00
damageext Use ARRAY_SIZE all over the tree 2017-10-30 13:45:20 -04:00
dbe Fix spelling/wording issues 2020-07-05 13:07:33 -07:00
dix fix for ZDI-11426 2020-07-31 14:51:23 +00:00
doc doc: Update URLs in Xserver-DTrace.xml 2020-07-05 13:18:45 -07:00
dri3 dri3: Include dix-config.h instead of xorg-config.h 2020-09-15 11:38:55 +02:00
exa exa: rename some badly named variables 2020-07-10 06:17:40 +10:00
fb xserver/output: rename some badly named variables/APIs. 2020-07-10 06:17:44 +10:00
glamor Consolidate fourcc.h 2020-09-15 11:43:16 +02:00
glx Fix spelling/wording issues 2020-07-05 13:07:33 -07:00
hw modesetting: keep going if a modeset fails on EnterVT 2020-09-25 16:13:56 +03:00
include Consolidate fourcc.h 2020-09-15 11:43:16 +02:00
m4 Add ax_pthread.m4 to m4/ 2016-05-29 19:20:51 -07:00
man dix: Remove -to option to set the default connection timeout 2019-10-30 16:17:04 +00:00
mi mi: Add a callback to notify driver about input event submission 2020-09-24 17:33:22 +00:00
miext Fix spelling/wording issues 2020-07-05 13:07:33 -07:00
os Fix spelling/wording issues 2020-07-05 13:07:33 -07:00
present present: Include dix-config.h instead of xorg-config.h 2020-09-15 11:41:34 +02:00
pseudoramiX Unvalidated lengths 2017-10-10 23:33:34 +02:00
randr randr: Check rrPrivKey in RRHasScanoutPixmap() 2020-07-21 15:53:53 +00:00
record Fix XRecordRegisterClients() Integer underflow 2020-08-25 17:01:29 +02:00
render dix: Call SourceValidate before GetImage 2019-10-30 16:26:01 +00:00
test test: Fix struct initialization warning 2020-05-08 16:45:50 +02:00
Xext Fix spelling/wording issues 2020-07-05 13:07:33 -07:00
xfixes Fix spelling/wording issues 2020-07-05 13:07:33 -07:00
Xi Fix XIChangeHierarchy() integer underflow 2020-08-25 17:01:29 +02:00
xkb Fix XkbSelectEvents() integer underflow 2020-08-25 17:01:29 +02:00
.appveyor.yml hw/xwin: Remove XSetAuthorization() for helper clients 2020-04-15 14:13:58 +00:00
.dir-locals.el .dir-locals.el: Add missing final newline 2019-10-01 17:05:28 +00:00
.gitignore .gitignore: Add new autotools file 'test-driver' 2014-04-21 13:41:42 -07:00
.gitlab-ci.yml gitlab CI: use the fdo ci-templates repository 2020-05-20 11:01:13 +10:00
.travis.yml travis: Add OSX meson build to matrix 2019-05-02 15:42:58 +00:00
autogen.sh autogen: Set a default subject prefix for patches 2016-02-08 17:41:38 -05:00
configure.ac xwayland: Add a pkg-config file for Xwayland 2020-07-08 08:56:32 +00:00
COPYING modesetting: Merge modesetting's COPYING into the xserver's. 2014-09-15 12:46:02 -07:00
devbook.am doc: Create a script to filter xmlto output 2015-01-05 14:24:06 -08:00
docbook.am docbook.am: embed css styles inside the HTML HEAD element 2011-09-21 14:07:49 -07:00
Makefile.am xfree86: Merge vbe into int10 2019-10-02 10:03:26 -04:00
manpages.am man: Fix automake seddery 2018-05-08 12:15:30 -04:00
meson_options.txt xwayland: Add a pkg-config file for Xwayland 2020-07-08 08:56:32 +00:00
meson.build meson: Also ignore kms, kms_udev, hal options on Cygwin 2020-07-29 21:01:59 +01:00
README.md Fix spelling/wording issues 2020-07-05 13:07:33 -07:00
xorg-server.m4 xorg-server.m4: just all cflags instead of just sdkdir 2018-09-20 20:12:24 +01:00
xorg-server.pc.in xfree86: link modules against Xorg symbols on Cygwin 2012-04-05 21:57:07 -05:00
xserver.ent.in doc: relocate xserver.ent in the package root directory 2011-05-14 11:22:26 -07:00

X Server

The X server accepts requests from client applications to create windows, which are (normally rectangular) "virtual screens" that the client program can draw into.

Windows are then composed on the actual screen by the X server (or by a separate composite manager) as directed by the window manager, which usually communicates with the user via graphical controls such as buttons and draggable titlebars and borders.

For a comprehensive overview of X Server and X Window System, consult the following article: https://en.wikipedia.org/wiki/X_server

All questions regarding this software should be directed at the Xorg mailing list:

https://lists.freedesktop.org/mailman/listinfo/xorg

The primary development code repository can be found at:

https://gitlab.freedesktop.org/xorg/xserver

For patch submission instructions, see:

https://www.x.org/wiki/Development/Documentation/SubmittingPatches

As with other projects hosted on freedesktop.org, X.Org follows its Code of Conduct, based on the Contributor Covenant. Please conduct yourself in a respectful and civilized manner when using the above mailing lists, bug trackers, etc:

https://www.freedesktop.org/wiki/CodeOfConduct