I noticed (it may be useful or not) that the VGA monitor goes to sleep mode almost only when I press a key with the focus on a window on the VGA monitor; otherwise it happens the monitor to stay awake for hours.
** Also affects: i915 (Ubuntu) Importance: Undecided Status: New ** Description changed: Without any clear correlation to events, the VGA output of my NUC5i3RYH goes to sleep, while the other output (HDMI) has no problem. The running system is Ubuntu MATE 16.04 amd64 with kernel 4.4.0-21.37-generic 4.4.6 The NUC5i3RYH has an onboard HD Intel 5500. It does NOT happen in 14.04 nor in 15.10. The monitor can be waken up again with xrandr with this script: - ### Switch off DP1 = VGA - xrandr --output HDMI1 --mode 1280x1024 --output DP1 --off + ### Switch off DP1 = VGA + xrandr --output HDMI1 --mode 1280x1024 --output DP1 --off - sleep 1 + sleep 1 - ### Turns it on again - xrandr --output HDMI1 --mode 1280x1024 --output DP1 --mode 1280x1024 --auto --right-of HDMI1 --primary + ### Turns it on again + xrandr --output HDMI1 --mode 1280x1024 --output DP1 --mode 1280x1024 --auto --right-of HDMI1 --primary The only info I found is in kern.log: - [80299.466886] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* - CPU pipe A FIFO underrun + [80299.466886] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] + *ERROR* CPU pipe A FIFO underrun No info in Xorg.log Will someone please help? Thanks. Marco - The relevant part of lspci about the GPU is: 00:02.0 VGA compatible controller [0300]: Intel Corporation Broadwell-U Integrated Graphics [8086:1616] (rev 09) (prog-if 00 [VGA controller]) - Subsystem: Intel Corporation Broadwell-U Integrated Graphics [8086:2057] - Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+ - Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- - Latency: 0 - Interrupt: pin A routed to IRQ 45 - Region 0: Memory at a9000000 (64-bit, non-prefetchable) [size=16M] - Region 2: Memory at b0000000 (64-bit, prefetchable) [size=256M] - Region 4: I/O ports at 2000 [size=64] - Expansion ROM at <unassigned> [disabled] - Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit- - Address: fee00018 Data: 0000 - Capabilities: [d0] Power Management version 2 - Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-) - Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME- - Capabilities: [a4] PCI Advanced Features - AFCap: TP+ FLR+ - AFCtrl: FLR- - AFStatus: TP- - Kernel driver in use: i915 - Kernel modules: i915 + Subsystem: Intel Corporation Broadwell-U Integrated Graphics [8086:2057] + Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+ + Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- + Latency: 0 + Interrupt: pin A routed to IRQ 45 + Region 0: Memory at a9000000 (64-bit, non-prefetchable) [size=16M] + Region 2: Memory at b0000000 (64-bit, prefetchable) [size=256M] + Region 4: I/O ports at 2000 [size=64] + Expansion ROM at <unassigned> [disabled] + Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit- + Address: fee00018 Data: 0000 + Capabilities: [d0] Power Management version 2 + Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-) + Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME- + Capabilities: [a4] PCI Advanced Features + AFCap: TP+ FLR+ + AFCtrl: FLR- + AFStatus: TP- + Kernel driver in use: i915 + Kernel modules: i915 I've tried to report the bug in the i915 package but the launchpad reports <<"i915" does not exist in Ubuntu. Please choose a different package. If you're unsure, please select "I don't know">>. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1573120 Title: VGA monitor goes to sleep randomly in 16.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/i915/+bug/1573120/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs