kernel-packages team mailing list archive

[Marco Aicardi <1573120@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

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

sleep 1

### 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

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

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">>.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1573120

Title:
  VGA monitor goes to sleep randomly in 16.04

Status in linux package in Ubuntu:
  New

Bug description:
  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

  sleep 1

  ### 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

  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

  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">>.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1573120/+subscriptions