Bug#884638: linux-image-4.9.0-4-amd64: Display cuts to black and back w/ intel gpu/fifo underrun

[Júlíus Þór Bess Ríkarðsson]

I can confirm this.

I have the exact same symptoms as Frederik describes.

I'm on a Thinkpad T450s with two external monitors connected through an
Ultra Dock.

Bug#884638: linux-image-4.9.0-4-amd64: Display cuts to black and back w/ intel gpu/fifo underrun

[frederik]

I can confirm this. For my Lenovo ThinkPad T450s with 2 external 
monitors, it is exactly the same. Drove me nuts for the better part of a 
day until I realized it was due to 4.9.0-4. As such I'm also back to 
running 4.9.0-3 as a workaround.


In my case I would only* get the flickering (ie. the screen/monitor 
goes blank for a sec or two) in the following scenario:


1) move mouse cursor inside of my GNOME Terminal window
2) use the keyboard to type something (anything)

*With the mouse cursor hovering outside of my term window, I was safe 
so to say. Having said this, occasionally a monitor would also flicker 
when moving the mouse cursor from one external monitor to another.


B/R,
Frederik Dannemare

Bug#884638: linux-image-4.9.0-4-amd64: Display cuts to black and back w/ intel gpu/fifo underrun

[John Eikenberry]

Package: src:linux
Version: 4.9.65-3
Severity: important

Dear Maintainer,

Using linux-image-4.9.0-4-amd64 the display (X windows) will cut to black for a
second or two and then return. When this happens this is found in the dmesg
output:

[drm:gen8_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun

This error always show up in the logs the first time the cutout occurs after a
reboot. The display will continue to cutout occasionally without it, but it
will occasionally appear later as well coinciding with the cutout.

The only reliable 'fix' I've found is to revert to the previous Linux image. As
of now the cutout will happen with the new kernel reliably after a few hours
use whereas the old image has never displayed this problem.

This seems to be a regression with linux-image-4.9.0-4-amd64, as this does not
occur with linux-image-4.9.0-3-amd64. I've currently 'fixed' this issue by
reverting to linux-image-4.9.0-3-amd64.

Thanks.

-- Package-specific info:
** Version:
Linux version 4.9.0-4-amd64 (debian-ker...@lists.debian.org) (gcc version 6.3.0 
20170516 (Debian 6.3.0-18) ) #1 SMP Debian 4.9.65-3 (2017-12-03)

** Command line:
BOOT_IMAGE=/boot/vmlinuz-4.9.0-4-amd64 
root=UUID=b822c687-447a-4293-ac33-c52fc510dab5 ro quiet

** Tainted: O (4096)
 * Out-of-tree module has been loaded.

** Kernel log:
[3.149351] intel_rapl: Found RAPL domain package
[3.149355] intel_rapl: Found RAPL domain core
[3.149357] intel_rapl: Found RAPL domain uncore
[3.149358] intel_rapl: Found RAPL domain dram
[3.173717] usb 3-2.4: New USB device found, idVendor=2109, idProduct=0812
[3.173719] usb 3-2.4: New USB device strings: Mfr=1, Product=2, 
SerialNumber=0
[3.173720] usb 3-2.4: Product: USB3.0 Hub 
[3.173721] usb 3-2.4: Manufacturer: VIA Labs, Inc. 
[3.175415] hub 3-2.4:1.0: USB hub found
[3.175513] hub 3-2.4:1.0: 4 ports detected
[3.197374] iTCO_vendor_support: vendor-support=0
[3.198881] ieee80211 phy0: Selected rate control algorithm 'iwl-mvm-rs'
[3.199006] iTCO_wdt: Intel TCO WatchDog Timer Driver v1.11
[3.199057] iTCO_wdt: Found a Wildcat Point_LP TCO device (Version=2, 
TCOBASE=0x1860)
[3.199631] iTCO_wdt: initialized. heartbeat=30 sec (nowayout=0)
[3.262273] usb 2-2.2: new full-speed USB device number 6 using xhci_hcd
[3.383756] usb 2-2.2: New USB device found, idVendor=1101, idProduct=0003
[3.383758] usb 2-2.2: New USB device strings: Mfr=1, Product=2, 
SerialNumber=0
[3.383758] usb 2-2.2: Product: Audioengine D1   
[3.383759] usb 2-2.2: Manufacturer:   2010 REV 1.7
[3.387255] input:   2010 REV 1.7 Audioengine D1as 
/devices/pci:00/:00:14.0/usb2/2-2/2-2.2/2-2.2:1.2/0003:1101:0003.0003/input/input11
[3.446363] hid-generic 0003:1101:0003.0003: input,hidraw2: USB HID v1.00 
Device [  2010 REV 1.7 Audioengine D1   ] on 
usb-:00:14.0-2.2/input2
[3.449540] hid-generic 0003:1101:0003.0004: hiddev0,hidraw3: USB HID v1.00 
Device [  2010 REV 1.7 Audioengine D1   ] on 
usb-:00:14.0-2.2/input3
[3.529685] random: crng init done
[3.542256] usb 2-2.3: new high-speed USB device number 7 using xhci_hcd
[3.657096] usb 2-2.3: New USB device found, idVendor=2109, idProduct=2812
[3.657098] usb 2-2.3: New USB device strings: Mfr=1, Product=2, 
SerialNumber=0
[3.657099] usb 2-2.3: Product: USB2.0 Hub 
[3.657099] usb 2-2.3: Manufacturer: VIA Labs, Inc. 
[3.657685] hub 2-2.3:1.0: USB hub found
[3.658061] hub 2-2.3:1.0: 4 ports detected
[3.758253] usb 2-2.4: new high-speed USB device number 8 using xhci_hcd
[3.872204] usb 2-2.4: New USB device found, idVendor=2109, idProduct=2812
[3.872207] usb 2-2.4: New USB device strings: Mfr=1, Product=2, 
SerialNumber=0
[3.872208] usb 2-2.4: Product: USB2.0 Hub 
[3.872209] usb 2-2.4: Manufacturer: VIA Labs, Inc. 
[3.872766] hub 2-2.4:1.0: USB hub found
[3.872883] hub 2-2.4:1.0: 4 ports detected
[3.894408] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
[3.966250] usb 2-2.3.1: new full-speed USB device number 9 using xhci_hcd
[4.093946] media: Linux media interface: v0.10
[4.096371] Linux video capture interface: v2.00
[4.099500] uvcvideo: Found UVC 1.00 device Integrated Camera (04ca:703c)
[4.105427] usb 2-2.3.1: New USB device found, idVendor=046d, idProduct=0a4d
[4.105429] usb 2-2.3.1: New USB device strings: Mfr=1, Product=2, 
SerialNumber=0
[4.105431] usb 2-2.3.1: Product: Logitech G430 Gaming Headset
[4.105441] usb 2-2.3.1: Manufacturer: Logitech
[4.106722] uvcvideo 2-8:1.0: Entity type for entity Extension 4 was not 
initialized!
[4.106725] uvcvideo 2-8:1.0: Entity type for entity Extension 3 was not 
initialized!
[4.106727] uvcvideo 2-8:1.0: Entity type for entity Processing 2 was not 
initialized!
[4.106728] uvcvideo 2-8:1.0: Entity type for