** Description changed: After upgrading to Ubuntu Gnome 16.04 LTS, the screen power saver started to malfunction. When the desktop is idle, it turn off the screen as usual, but a second later it turns the screen back on. This happens repeatedly. I have disconnected any input device as well. I'm using Ubuntu gnome 16.04 with kernel version: 4.4.0-21-generic x86_64 This is the syslog entries from the moment the power-saver mode was started: - Apr 25 11:25:58 Funaro-Home kernel: [211250.250189] [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR* uncleared pch fifo underrun on pch transcoder A - Apr 25 11:26:05 Funaro-Home /usr/lib/gdm3/gdm-x-session[1167]: (II) intel(0): resizing framebuffer to 1680x1050 - Apr 25 11:26:05 Funaro-Home /usr/lib/gdm3/gdm-x-session[1167]: (II) intel(0): switch to mode [email protected] on VGA1 using pipe 0, position (0, 0), rotation normal, reflection none - Apr 25 11:26:05 Funaro-Home gnome-session[1180]: Gjs-Message: JS LOG: Device -> - Apr 25 11:26:05 Funaro-Home dbus[696]: [system] Activating via systemd: service name='org.freedesktop.hostname1' unit='dbus-org.freedesktop.hostname1.service' - Apr 25 11:26:05 Funaro-Home systemd[1]: Starting Hostname Service... - Apr 25 11:26:05 Funaro-Home kernel: [211257.746217] gnome-shell[20730]: segfault at 33684 ip 00007f80010fd7e5 sp 00007ffe6707deb8 error 4 in libgobject-2.0.so.0.4800.0[7f80010c9000+52000] - Apr 25 11:26:05 Funaro-Home dbus[696]: [system] Successfully activated service 'org.freedesktop.hostname1' - Apr 25 11:26:05 Funaro-Home systemd[1]: Started Hostname Service. - Apr 25 11:26:05 Funaro-Home gnome-session[1180]: gnome-session-binary[1180]: WARNING: Application 'gnome-shell.desktop' killed by signal 11 - Apr 25 11:26:05 Funaro-Home gnome-session-binary[1180]: WARNING: Application 'gnome-shell.desktop' killed by signal 11 - Apr 25 11:26:05 Funaro-Home gnome-session[1180]: (gnome-settings-daemon:1329): GnomeDesktop-WARNING **: Error setting property 'PowerSaveMode' on interface org.gnome.Mutter.DisplayConfig: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name :1.435 was not provided by any .service files (g-dbus-error-quark, 2) - Apr 25 11:26:05 Funaro-Home /usr/lib/gdm3/gdm-x-session[1167]: (II) intel(0): resizing framebuffer to 3600x1080 - Apr 25 11:26:05 Funaro-Home /usr/lib/gdm3/gdm-x-session[1167]: (II) intel(0): switch to mode [email protected] on HDMI2 using pipe 0, position (0, 0), rotation normal, reflection none - Apr 25 11:26:05 Funaro-Home /usr/lib/gdm3/gdm-x-session[1167]: (II) intel(0): switch to mode [email protected] on VGA1 using pipe 1, position (1920, 30), rotation normal, reflection none - Apr 25 11:26:05 Funaro-Home kernel: [211258.006231] [drm:intel_set_cpu_fifo_underrun_reporting [i915]] *ERROR* uncleared fifo underrun on pipe B - Apr 25 11:26:05 Funaro-Home kernel: [211258.006246] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun - Apr 25 11:26:06 Funaro-Home gnome-session[1180]: current session already has an ibus-daemon. - Apr 25 11:26:06 Funaro-Home dbus[696]: [system] Activating via systemd: service name='org.freedesktop.GeoClue2' unit='geoclue.service' - Apr 25 11:26:06 Funaro-Home systemd[1]: Starting Location Lookup Service... - Apr 25 11:26:06 Funaro-Home dbus[696]: [system] Successfully activated service 'org.freedesktop.GeoClue2' - Apr 25 11:26:06 Funaro-Home systemd[1]: Started Location Lookup Service. - Apr 25 11:26:06 Funaro-Home dbus[696]: [system] Activating service name='org.freedesktop.PackageKit' (using servicehelper) - Apr 25 11:26:06 Funaro-Home gnome-session[1180]: Gjs-Message: JS LOG: No permission to trigger offline updates: Polkit.Error: GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: Action org.freedesktop.packagekit.trigger-offline-update is not registered - Apr 25 11:26:06 Funaro-Home gnome-session[1180]: Gjs-Message: JS WARNING: [/home/liran/.local/share/gnome-shell/extensions/[email protected]/net_speed_status_icon.js 156]: assignment to undeclared variable device - Apr 25 11:26:06 Funaro-Home gnome-session[1180]: Gjs-Message: JS LOG: Device -> - Apr 25 11:26:06 Funaro-Home AptDaemon: INFO: Initializing daemon - Apr 25 11:26:06 Funaro-Home org.freedesktop.PackageKit[696]: 11:26:06 AptDaemon [INFO]: Initializing daemon - Apr 25 11:26:06 Funaro-Home AptDaemon.PackageKit: INFO: Initializing PackageKit compat layer - Apr 25 11:26:06 Funaro-Home org.freedesktop.PackageKit[696]: /usr/lib/python3/dist-packages/aptdaemon/worker/pkworker.py:35: PyGIWarning: PackageKitGlib was imported without specifying a version first. Use gi.require_version('PackageKitGlib', '1.0') before import to ensure that the right version gets loaded. - Apr 25 11:26:06 Funaro-Home org.freedesktop.PackageKit[696]: from gi.repository import PackageKitGlib as pk - Apr 25 11:26:06 Funaro-Home org.freedesktop.PackageKit[696]: 11:26:06 AptDaemon.PackageKit [INFO]: Initializing PackageKit compat layer - Apr 25 11:26:06 Funaro-Home dbus[696]: [system] Successfully activated service 'org.freedesktop.PackageKit' - Apr 25 11:26:06 Funaro-Home gnome-session[1180]: Gjs-Message: JS LOG: [FREON] Render all MenuItems - Apr 25 11:26:07 Funaro-Home gnome-shell[30007]: GNOME Shell started at Mon Apr 25 2016 11:26:06 GMT+0300 (IDT) + Apr 27 16:09:31 Funaro-Home /usr/lib/gdm3/gdm-x-session[1152]: (II) intel(0): resizing framebuffer to 1680x1050 + Apr 27 16:09:31 Funaro-Home /usr/lib/gdm3/gdm-x-session[1152]: (II) intel(0): switch to mode [email protected] on VGA1 using pipe 0, position (0, 0), rotation normal, reflection none + Apr 27 16:09:31 Funaro-Home /usr/lib/gdm3/gdm-x-session[1152]: (II) intel(0): resizing framebuffer to 3600x1080 + Apr 27 16:09:31 Funaro-Home /usr/lib/gdm3/gdm-x-session[1152]: (II) intel(0): switch to mode [email protected] on HDMI2 using pipe 0, position (0, 0), rotation normal, reflection none + Apr 27 16:09:31 Funaro-Home /usr/lib/gdm3/gdm-x-session[1152]: (II) intel(0): switch to mode [email protected] on VGA1 using pipe 1, position (1920, 30), rotation normal, reflection none + Apr 27 16:09:32 Funaro-Home gnome-session[1165]: (gnome-shell:1390): GLib-GObject-WARNING **: /build/glib2.0-t9oPgV/glib2.0-2.48.0/./gobject/gsignal.c:2635: instance '0x2e02040' has no handler with id '71399' + Apr 27 16:09:32 Funaro-Home gnome-session[1165]: (gnome-shell:1390): GLib-GObject-WARNING **: /build/glib2.0-t9oPgV/glib2.0-2.48.0/./gobject/gsignal.c:2635: instance '0x2e02040' has no handler with id '71399' + Apr 27 16:09:36 Funaro-Home gnome-session[1165]: Gjs-Message: JS LOG: Device -> + Apr 27 16:09:36 Funaro-Home dbus[737]: [system] Activating via systemd: service name='org.freedesktop.hostname1' unit='dbus-org.freedesktop.hostname1.service' + Apr 27 16:09:36 Funaro-Home systemd[1]: Starting Hostname Service... + Apr 27 16:09:36 Funaro-Home dbus[737]: [system] Successfully activated service 'org.freedesktop.hostname1' + Apr 27 16:09:36 Funaro-Home systemd[1]: Started Hostname Service. + Apr 27 16:09:36 Funaro-Home gnome-session[1165]: Gjs-Message: JS LOG: [FREON] Render all MenuItems + + Edit: kernel version 4.5 fixed the errors with intel drm (see updated + log above), but the problem remains the same.
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