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My laptop has switchable graphics, as you can see here:
$ lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Seymour [Radeon HD 6400M/7400M Series] (rev ff)I can turn my ATI graphics card on and off with vgaswitcheroo:
# echo OFF > /sys/kernel/debug/vgaswitcheroo/switch
# cat /sys/kernel/debug/vgaswitcheroo/switch
0:DIS: :Off:0000:01:00.0
1:IGD:+:Pwr:0000:00:02.0
# echo ON > /sys/kernel/debug/vgaswitcheroo/switch
0:DIS: :Pwr:0000:01:00.0
1:IGD:+:Pwr:0000:00:02.0
# cat /sys/kernel/debug/vgaswitcheroo/switchHowever, I can't switch to my discrete graphics card:
# echo DIS > /sys/kernel/debug/vgaswitcheroo/switch
# cat /sys/kernel/debug/vgaswitcheroo/switch
0:DIS: :Pwr:0000:01:00.0
1:IGD:+:Pwr:0000:00:02.0After running this command, this line appears in journalctl:
vga_switcheroo: client 0 refused switchI tried echoing DDIS too, so the switch would occur when X restarted. After restarting GDM, I'm stuck at a black screen (similar to how it looks when powered off), but my laptop is still on. Here is what journalctl has throughout the process:
Jan 12 16:13:32 arch gdm[1524]: GdmLocalDisplayFactory: maximum number of X display failures reached: check X server log for errors
Jan 12 16:13:32 arch gdm[1524]: GdmDisplay: display lasted 0.099273 seconds
Jan 12 16:13:32 arch gdm[1524]: GLib-GObject: g_object_unref: assertion 'object->ref_count > 0' failed
Jan 12 16:13:32 arch gdm[1524]: GLib-GObject: g_object_ref: assertion 'object->ref_count > 0' failed
Jan 12 16:13:32 arch gdm[1524]: Child process 1577 was already dead.
Jan 12 16:13:32 arch dbus[375]: [system] Rejected send message, 1 matched rules; type="method_call", sender=":1.75" (uid=0 pid=1524 comm="/usr/bin/gdm ") interface="org.freedesktop.DBus.Properties" member="GetAll" error name="(unset)" requested_reply="0" destination=":1.90" (uid=0 pid=1573 comm="/usr/lib/gdm/gdm-simple-slave --display-id /org/gn")
Jan 12 16:13:32 arch dbus-daemon[375]: dbus[375]: [system] Rejected send message, 1 matched rules; type="method_call", sender=":1.75" (uid=0 pid=1524 comm="/usr/bin/gdm ") interface="org.freedesktop.DBus.Properties" member="GetAll" error name="(unset)" requested_reply="0" destination=":1.90" (uid=0 pid=1573 comm="/usr/lib/gdm/gdm-simple-slave --display-id /org/gn")
Jan 12 16:13:32 arch gdm[1524]: GdmDisplay: display lasted 0.103389 seconds
Jan 12 16:13:32 arch gdm[1524]: GLib-GObject: g_object_unref: assertion 'object->ref_count > 0' failed
Jan 12 16:13:32 arch gdm[1524]: GLib-GObject: g_object_ref: assertion 'object->ref_count > 0' failed
Jan 12 16:13:32 arch gdm[1524]: Child process 1572 was already dead.
Jan 12 16:13:32 arch dbus[375]: [system] Rejected send message, 1 matched rules; type="method_call", sender=":1.75" (uid=0 pid=1524 comm="/usr/bin/gdm ") interface="org.freedesktop.DBus.Properties" member="GetAll" error name="(unset)" requested_reply="0" destination=":1.87" (uid=0 pid=1568 comm="/usr/lib/gdm/gdm-simple-slave --display-id /org/gn")
Jan 12 16:13:32 arch dbus-daemon[375]: dbus[375]: [system] Rejected send message, 1 matched rules; type="method_call", sender=":1.75" (uid=0 pid=1524 comm="/usr/bin/gdm ") interface="org.freedesktop.DBus.Properties" member="GetAll" error name="(unset)" requested_reply="0" destination=":1.87" (uid=0 pid=1568 comm="/usr/lib/gdm/gdm-simple-slave --display-id /org/gn")
Jan 12 16:13:32 arch gdm[1524]: GdmDisplay: display lasted 0.100355 seconds
Jan 12 16:13:32 arch gdm[1524]: GLib-GObject: g_object_unref: assertion 'object->ref_count > 0' failed
Jan 12 16:13:32 arch gdm[1524]: GLib-GObject: g_object_ref: assertion 'object->ref_count > 0' failed
Jan 12 16:13:32 arch gdm[1524]: Child process 1567 was already dead.
Jan 12 16:13:32 arch dbus[375]: [system] Rejected send message, 1 matched rules; type="method_call", sender=":1.75" (uid=0 pid=1524 comm="/usr/bin/gdm ") interface="org.freedesktop.DBus.Properties" member="GetAll" error name="(unset)" requested_reply="0" destination=":1.86" (uid=0 pid=1563 comm="/usr/lib/gdm/gdm-simple-slave --display-id /org/gn")
Jan 12 16:13:32 arch dbus-daemon[375]: dbus[375]: [system] Rejected send message, 1 matched rules; type="method_call", sender=":1.75" (uid=0 pid=1524 comm="/usr/bin/gdm ") interface="org.freedesktop.DBus.Properties" member="GetAll" error name="(unset)" requested_reply="0" destination=":1.86" (uid=0 pid=1563 comm="/usr/lib/gdm/gdm-simple-slave --display-id /org/gn")
Jan 12 16:13:31 arch gdm[1524]: GdmDisplay: display lasted 0.113171 seconds
Jan 12 16:13:31 arch gdm[1524]: GLib-GObject: g_object_unref: assertion 'object->ref_count > 0' failed
Jan 12 16:13:31 arch gdm[1524]: GLib-GObject: g_object_ref: assertion 'object->ref_count > 0' failed
Jan 12 16:13:31 arch gdm[1524]: Child process 1562 was already dead.
Jan 12 16:13:31 arch dbus[375]: [system] Rejected send message, 1 matched rules; type="method_call", sender=":1.75" (uid=0 pid=1524 comm="/usr/bin/gdm ") interface="org.freedesktop.DBus.Properties" member="GetAll" error name="(unset)" requested_reply="0" destination=":1.85" (uid=0 pid=1558 comm="/usr/lib/gdm/gdm-simple-slave --display-id /org/gn")
Jan 12 16:13:31 arch dbus-daemon[375]: dbus[375]: [system] Rejected send message, 1 matched rules; type="method_call", sender=":1.75" (uid=0 pid=1524 comm="/usr/bin/gdm ") interface="org.freedesktop.DBus.Properties" member="GetAll" error name="(unset)" requested_reply="0" destination=":1.85" (uid=0 pid=1558 comm="/usr/lib/gdm/gdm-simple-slave --display-id /org/gn")
Jan 12 16:13:31 arch gdm[1524]: GdmDisplay: display lasted 2.772554 seconds
Jan 12 16:13:31 arch gdm[1524]: GLib-GObject: g_object_unref: assertion 'object->ref_count > 0' failed
Jan 12 16:13:31 arch gdm[1524]: GLib-GObject: g_object_ref: assertion 'object->ref_count > 0' failed
Jan 12 16:13:31 arch gdm[1524]: Child process 1551 was already dead.
Jan 12 16:13:31 arch kernel: i915: switched off
Jan 12 16:13:31 arch kernel: fbcon: Remapping primary device, fb1, to tty 1-63
Jan 12 16:13:31 arch kernel: vga_switcheroo: processing delayed switch to 1
Jan 12 16:13:29 arch gnome-session[645]: Your night-time color temperature is 3400
Jan 12 16:13:29 arch gnome-session[645]: Your location (lat, long) is 42.3, -83.7
Jan 12 16:13:29 arch gnome-session[645]: Found 1 screen.
Jan 12 16:13:29 arch gnome-session[645]: This will only work if you're running X on console.
Jan 12 16:13:29 arch gnome-session[645]: Welcome to xflux (f.lux for X)
Jan 12 16:13:29 arch gnome-session[645]: --------
Jan 12 16:13:29 arch gnome-session[645]: [10B blob data]
Jan 12 16:13:29 arch gnome-session[645]: after 4724 requests (4724 known processed) with 0 events remaining.
Jan 12 16:13:29 arch gnome-session[645]: XIO: fatal IO error 11 (Resource temporarily unavailable) on X server ":0"
Jan 12 16:13:29 arch gdm[381]: GLib-GObject: g_object_unref: assertion 'object->ref_count > 0' failed
Jan 12 16:13:29 arch kernel: vga_switcheroo: client 0 refused switch
Jan 12 16:13:29 arch kernel: vga_switcheroo: processing delayed switch to 1
Jan 12 16:13:29 arch dbus[375]: [system] Rejected send message, 1 matched rules; type="method_call", sender=":1.75" (uid=0 pid=1524 comm="/usr/bin/gdm ") interface="org.freedesktop.DBus.Properties" member="GetAll" error name="(unset)" requested_reply="0" destination=":1.78" (uid=0 pid=1546 comm="/usr/lib/gdm/gdm-simple-slave --display-id /org/gn")
Jan 12 16:13:29 arch dbus-daemon[375]: dbus[375]: [system] Rejected send message, 1 matched rules; type="method_call", sender=":1.75" (uid=0 pid=1524 comm="/usr/bin/gdm ") interface="org.freedesktop.DBus.Properties" member="GetAll" error name="(unset)" requested_reply="0" destination=":1.78" (uid=0 pid=1546 comm="/usr/lib/gdm/gdm-simple-slave --display-id /org/gn")
Jan 12 16:13:29 arch gnome-session[645]: g_dbus_connection_real_closed: Remote peer vanished with error: Underlying GIOStream returned 0 bytes on an async read (g-io-error-quark, 0). Exiting.
Jan 12 16:13:29 arch gnome-session[645]: [842:842:0112/161329:ERROR:chrome_browser_main_extra_parts_x11.cc(57)] X IO error received (X server probably went away)
Jan 12 16:13:29 arch gdm[1524]: GdmDisplay: display lasted 0.024370 seconds
Jan 12 16:13:29 arch gnome-session[645]: g_dbus_connection_real_closed: Remote peer vanished with error: Underlying GIOStream returned 0 bytes on an async read (g-io-error-quark, 0). Exiting.
Jan 12 16:13:29 arch gdm[1524]: GLib-GObject: g_object_unref: assertion 'object->ref_count > 0' failed
Jan 12 16:13:29 arch gdm[1524]: GLib-GObject: g_object_ref: assertion 'object->ref_count > 0' failed
Jan 12 16:13:29 arch gdm[1524]: Child process 1545 was already dead.
Jan 12 16:13:29 arch gnome-session[645]: (nm-applet:886): Gdk-WARNING **: nm-applet: Fatal IO error 11 (Resource temporarily unavailable) on X server :0.
Jan 12 16:13:29 arch gnome-session[645]: g_dbus_connection_real_closed: Remote peer vanished with error: Underlying GIOStream returned 0 bytes on an async read (g-io-error-quark, 0). Exiting.
Jan 12 16:13:29 arch gnome-session[645]: gnome-session[645]: WARNING: App 'gnome-settings-daemon.desktop' exited with code 1
Jan 12 16:13:29 arch dbus-daemon[375]: dbus[375]: [system] Rejected send message, 1 matched rules; type="method_call", sender=":1.75" (uid=0 pid=1524 comm="/usr/bin/gdm ") interface="org.freedesktop.DBus.Properties" member="GetAll" error name="(unset)" requested_reply="0" destination=":1.77" (uid=0 pid=1536 comm="/usr/lib/gdm/gdm-simple-slave --display-id /org/gn")
Jan 12 16:13:29 arch sudo[1301]: pam_unix(sudo:session): session closed for user root
Jan 12 16:13:29 arch su[1302]: pam_unix(su:session): session closed for user root
Jan 12 16:13:29 arch sudo[1434]: pam_unix(sudo:session): session closed for user root
Jan 12 16:13:29 arch dbus[375]: [system] Rejected send message, 1 matched rules; type="method_call", sender=":1.75" (uid=0 pid=1524 comm="/usr/bin/gdm ") interface="org.freedesktop.DBus.Properties" member="GetAll" error name="(unset)" requested_reply="0" destination=":1.77" (uid=0 pid=1536 comm="/usr/lib/gdm/gdm-simple-slave --display-id /org/gn")
Jan 12 16:13:29 arch NetworkManager[373]: <warn> error requesting auth for org.freedesktop.NetworkManager.wifi.share.open: (3) GDBus.Error:org.freedesktop.DBus.Error.NameHasNoOwner: GDBus.Error:org.freedesktop.DBus.Error.NameHasNoOwner: Could not get UID of name ':1.46': no such name
Jan 12 16:13:29 arch polkitd[432]: Unregistered Authentication Agent for unix-session:2 (system bus name :1.48, object path /org/freedesktop/PolicyKit1/AuthenticationAgent, locale en_US.UTF-8) (disconnected from bus)
Jan 12 16:13:29 arch gdm-password][636]: pam_unix(gdm-password:session): session closed for user gulshan
Jan 12 16:13:29 arch colord[431]: device removed: xrandr-Seiko Epson Corporation
Jan 12 16:13:29 arch colord[431]: Profile removed: icc-4f22b073ee88e534b2d7510fc8c79698
Jan 12 16:13:29 arch colord[431]: Profile removed: icc-9a369099fc58ff34a8377bee4a97546d
Jan 12 16:13:29 arch colord[431]: Profile removed: icc-955da4f48cc6904bf605511fe64de94d
Jan 12 16:13:29 arch colord[431]: Profile removed: icc-bfbd9db928271c7ea9a800a2dc9f5e62
Jan 12 16:13:29 arch colord[431]: Automatic remove of icc-bfbd9db928271c7ea9a800a2dc9f5e62 from xrandr-Seiko Epson Corporation
Jan 12 16:13:29 arch gnome-session[645]: WARNING: App 'gnome-settings-daemon.desktop' exited with code 1
Jan 12 16:13:29 arch systemd[1]: Started GNOME Display Manager.
Jan 12 16:13:29 arch systemd[1]: Starting GNOME Display Manager...
Jan 12 16:13:29 arch gnome-session[645]: (gnome-settings-daemon:693): Gdk-WARNING **: gnome-settings-daemon: Fatal IO error 11 (Resource temporarily unavailable) on X server :0.
Jan 12 16:13:29 arch gnome-session[645]: Window manager warning: Log level 16: gnome-shell: Fatal IO error 11 (Resource temporarily unavailable) on X server :0.
Jan 12 16:13:29 arch gdm[381]: GLib-GObject: g_object_ref: assertion 'object->ref_count > 0' failed
Jan 12 16:13:29 arch systemd[1]: Stopping GNOME Display Manager...
Jan 12 16:13:19 arch dbus-daemon[375]: dbus[375]: [system] Activation via systemd failed for unit 'dbus-org.freedesktop.ModemManager1.service': Unit dbus-org.freedesktop.ModemManager1.service failed to load: No such file or directory.
Jan 12 16:13:19 arch dbus[375]: [system] Activation via systemd failed for unit 'dbus-org.freedesktop.ModemManager1.service': Unit dbus-org.freedesktop.ModemManager1.service failed to load: No such file or directory.
Jan 12 16:13:19 arch dbus[375]: [system] Activating via systemd: service name='org.freedesktop.ModemManager1' unit='dbus-org.freedesktop.ModemManager1.service'
Jan 12 16:13:19 arch dbus-daemon[375]: dbus[375]: [system] Activating via systemd: service name='org.freedesktop.ModemManager1' unit='dbus-org.freedesktop.ModemManager1.service'
Jan 12 16:13:10 arch gnome-session[645]: [129:129:0112/161310:ERROR:base_feature_provider.cc(122)] manifestTypes: Allowing web_page contexts requires supplying a value for matches.
Jan 12 16:13:07 arch gnome-session[645]: [125:125:0112/161307:ERROR:base_feature_provider.cc(122)] manifestTypes: Allowing web_page contexts requires supplying a value for matches.
Jan 12 16:12:57 arch kernel: vga_switcheroo: setting delayed switch to client 1It says to check the X logs, so I check those and this is what I find:
[ 631.039]
X.Org X Server 1.14.5
Release Date: 2013-12-12
[ 631.039] X Protocol Version 11, Revision 0
[ 631.039] Build Operating System: Linux 3.12.5-1-ARCH x86_64
[ 631.039] Current Operating System: Linux arch 3.12.7-1-ARCH #1 SMP PREEMPT Fri Jan 10 08:50:35 CET 2014 x86_64
[ 631.039] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-linux root=UUID=5ba710b1-c7b7-410d-baed-d6670f818d56 rw quiet
[ 631.039] Build Date: 06 January 2014 10:25:32PM
[ 631.039]
[ 631.039] Current version of pixman: 0.32.4
[ 631.039] Before reporting problems, check http://wiki.x.org
to make sure that you have the latest version.
[ 631.039] Markers: (--) probed, (**) from config file, (==) default setting,
(++) from command line, (!!) notice, (II) informational,
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[ 631.039] (==) Log file: "/var/log/Xorg.3.log", Time: Sun Jan 12 16:13:32 2014
[ 631.039] (==) Using config directory: "/etc/X11/xorg.conf.d"
[ 631.039] (==) Using system config directory "/usr/share/X11/xorg.conf.d"
[ 631.039] (==) No Layout section. Using the first Screen section.
[ 631.039] (==) No screen section available. Using defaults.
[ 631.039] (**) |-->Screen "Default Screen Section" (0)
[ 631.039] (**) | |-->Monitor "<default monitor>"
[ 631.040] (==) No device specified for screen "Default Screen Section".
Using the first device section listed.
[ 631.040] (**) | |-->Device "Intel Graphics"
[ 631.040] (==) No monitor specified for screen "Default Screen Section".
Using a default monitor configuration.
[ 631.040] (==) Automatically adding devices
[ 631.040] (==) Automatically enabling devices
[ 631.040] (==) Automatically adding GPU devices
[ 631.040] (WW) The directory "/usr/share/fonts/OTF/" does not exist.
[ 631.040] Entry deleted from font path.
[ 631.040] (WW) `fonts.dir' not found (or not valid) in "/usr/share/fonts/100dpi/".
[ 631.040] Entry deleted from font path.
[ 631.040] (Run 'mkfontdir' on "/usr/share/fonts/100dpi/").
[ 631.040] (WW) `fonts.dir' not found (or not valid) in "/usr/share/fonts/75dpi/".
[ 631.040] Entry deleted from font path.
[ 631.040] (Run 'mkfontdir' on "/usr/share/fonts/75dpi/").
[ 631.040] (==) FontPath set to:
/usr/share/fonts/misc/,
/usr/share/fonts/TTF/,
/usr/share/fonts/Type1/
[ 631.040] (==) ModulePath set to "/usr/lib/xorg/modules"
[ 631.040] (II) The server relies on udev to provide the list of input devices.
If no devices become available, reconfigure udev or disable AutoAddDevices.
[ 631.040] (II) Loader magic: 0x7fac20
[ 631.040] (II) Module ABI versions:
[ 631.040] X.Org ANSI C Emulation: 0.4
[ 631.040] X.Org Video Driver: 14.1
[ 631.040] X.Org XInput driver : 19.1
[ 631.040] X.Org Server Extension : 7.0
[ 631.040] (II) xfree86: Adding drm device (/dev/dri/card1)
[ 631.040] (II) xfree86: Adding drm device (/dev/dri/card0)
[ 631.042] (--) PCI: (0:0:2:0) 8086:0116:103c:185d rev 9, Mem @ 0xc0000000/4194304, 0xb0000000/268435456, I/O @ 0x00006000/64
[ 631.042] (--) PCI:*(0:1:0:0) 1002:6760:103c:185d rev 0, Mem @ 0xa0000000/268435456, 0xc6500000/131072, I/O @ 0x00005000/256, BIOS @ 0x????????/131072
[ 631.042] Initializing built-in extension Generic Event Extension
[ 631.042] Initializing built-in extension SHAPE
[ 631.042] Initializing built-in extension MIT-SHM
[ 631.042] Initializing built-in extension XInputExtension
[ 631.042] Initializing built-in extension XTEST
[ 631.042] Initializing built-in extension BIG-REQUESTS
[ 631.042] Initializing built-in extension SYNC
[ 631.042] Initializing built-in extension XKEYBOARD
[ 631.042] Initializing built-in extension XC-MISC
[ 631.042] Initializing built-in extension SECURITY
[ 631.042] Initializing built-in extension XINERAMA
[ 631.042] Initializing built-in extension XFIXES
[ 631.042] Initializing built-in extension RENDER
[ 631.042] Initializing built-in extension RANDR
[ 631.042] Initializing built-in extension COMPOSITE
[ 631.042] Initializing built-in extension DAMAGE
[ 631.042] Initializing built-in extension MIT-SCREEN-SAVER
[ 631.043] Initializing built-in extension DOUBLE-BUFFER
[ 631.043] Initializing built-in extension RECORD
[ 631.043] Initializing built-in extension DPMS
[ 631.043] Initializing built-in extension X-Resource
[ 631.043] Initializing built-in extension XVideo
[ 631.043] Initializing built-in extension XVideo-MotionCompensation
[ 631.043] Initializing built-in extension XFree86-VidModeExtension
[ 631.043] Initializing built-in extension XFree86-DGA
[ 631.043] Initializing built-in extension XFree86-DRI
[ 631.043] Initializing built-in extension DRI2
[ 631.043] (II) "glx" will be loaded by default.
[ 631.043] (II) LoadModule: "dri2"
[ 631.043] (II) Module "dri2" already built-in
[ 631.043] (II) LoadModule: "glamoregl"
[ 631.043] (II) Loading /usr/lib/xorg/modules/libglamoregl.so
[ 631.044] (II) Module glamoregl: vendor="X.Org Foundation"
[ 631.044] compiled for 1.14.2, module version = 0.5.1
[ 631.044] ABI class: X.Org ANSI C Emulation, version 0.4
[ 631.044] (II) LoadModule: "glx"
[ 631.044] (II) Loading /usr/lib/xorg/modules/extensions/libglx.so
[ 631.044] (II) Module glx: vendor="X.Org Foundation"
[ 631.045] compiled for 1.14.5, module version = 1.0.0
[ 631.045] ABI class: X.Org Server Extension, version 7.0
[ 631.045] (==) AIGLX enabled
[ 631.045] Loading extension GLX
[ 631.045] (II) LoadModule: "intel"
[ 631.045] (II) Loading /usr/lib/xorg/modules/drivers/intel_drv.so
[ 631.045] (II) Module intel: vendor="X.Org Foundation"
[ 631.045] compiled for 1.14.2, module version = 2.21.15
[ 631.045] Module class: X.Org Video Driver
[ 631.045] ABI class: X.Org Video Driver, version 14.1
[ 631.045] (II) intel: Driver for Intel(R) Integrated Graphics Chipsets:
i810, i810-dc100, i810e, i815, i830M, 845G, 854, 852GM/855GM, 865G,
915G, E7221 (i915), 915GM, 945G, 945GM, 945GME, Pineview GM,
Pineview G, 965G, G35, 965Q, 946GZ, 965GM, 965GME/GLE, G33, Q35, Q33,
GM45, 4 Series, G45/G43, Q45/Q43, G41, B43, HD Graphics,
HD Graphics 2000, HD Graphics 3000, HD Graphics 2500,
HD Graphics 4000, HD Graphics P4000, HD Graphics 4600,
HD Graphics 5000, HD Graphics P4600/P4700, Iris(TM) Graphics 5100,
HD Graphics 4400, HD Graphics 4200, Iris(TM) Pro Graphics 5200
[ 631.046] (++) using VT number 1
[ 631.105] (EE) No devices detected.
[ 631.105] (EE)
Fatal server error:
[ 631.105] (EE) no screens found(EE)
[ 631.105] (EE)
Please consult the The X.Org Foundation support
at http://wiki.x.org
for help.
[ 631.105] (EE) Please also check the log file at "/var/log/Xorg.3.log" for additional information.
[ 631.105] (EE) Any ideas on how to fix this?
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