Ubuntu
linux package

UI performance slow (0,5fps) when I disable primary notebook display

Bug #1666776 reported by Martin Vysny on 2017-02-22

This bug affects 1 person

Affects		Status	Importance	Assigned to	Milestone
	linux (Ubuntu)	Confirmed	Medium	Unassigned

Bug Description

I'm running Intel® HD Graphics 530 (Skylake GT2) onboard on Intel® Core™ i7-6700HQ CPU @ 2.60GHz × 8. I have an external monitor attached via miniDP. Since I prefer to work on one screen only, I tend to disable the built-in display and only use the monitor.

However, when I launch Display settings and try to turn off Built-in Display, it works (primary display is turned off while external monitor shows UI output). The problem is that the desktop UI is unbearably slow (0,5 FPS), so it is even hard to target the "Cancel" button on the "Would you like to keep the settings" dialog. Luckily, the display setting reverts automatically :-)

Since I only use one display, I have then enable "Mirror display" which uses suboptimal 1920x1080 on my 1920x1200 monitor. It's fine, but it's not perfect ;)

Thank you so much!

ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: linux-image-generic 4.8.0.38.49
ProcVersionSignature: Ubuntu 4.8.0-38.41-generic 4.8.17
Uname: Linux 4.8.0-38-generic x86_64
ApportVersion: 2.20.3-0ubuntu8.2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: mavi 3412 F.... pulseaudio
/dev/snd/controlC1: mavi 3412 F.... pulseaudio
CurrentDesktop: Unity
Date: Wed Feb 22 08:24:00 2017
HibernationDevice: RESUME=/dev/mapper/vg0-lv0--swap
InstallationDate: Installed on 2016-09-05 (169 days ago)
InstallationMedia: Ubuntu-Server 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
MachineType: LENOVO 20EN0005MS
ProcFB:
0 nouveaufb
1 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.8.0-38-generic root=/dev/mapper/vg0-lv1--root ro splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-4.8.0-38-generic N/A
linux-backports-modules-4.8.0-38-generic N/A
linux-firmware 1.161.1
SourcePackage: linux
UpgradeStatus: Upgraded to yakkety on 2016-09-30 (144 days ago)
dmi.bios.date: 12/08/2016
dmi.bios.vendor: LENOVO
dmi.bios.version: N1EET64W (1.37 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20EN0005MS
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40705 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias: dmi:bvnLENOVO:bvrN1EET64W(1.37):bd12/08/2016:svnLENOVO:pn20EN0005MS:pvrThinkPadP50:rvnLENOVO:rn20EN0005MS:rvrSDK0J40705WIN:cvnLENOVO:ct10:cvrNone:
dmi.product.name: 20EN0005MS
dmi.product.version: ThinkPad P50
dmi.sys.vendor: LENOVO

Tags:

Revision history for this message

Martin Vysny (vyzivus) wrote on 2017-02-22:

AlsaInfo.txt Edit (27.5 KiB, text/plain; charset="utf-8")
CRDA.txt Edit (392 bytes, text/plain; charset="utf-8")
CurrentDmesg.txt Edit (68.4 KiB, text/plain; charset="utf-8")
Dependencies.txt Edit (3.4 KiB, text/plain; charset="utf-8")
IwConfig.txt Edit (506 bytes, text/plain; charset="utf-8")
JournalErrors.txt Edit (17.7 KiB, text/plain; charset="utf-8")
Lspci.txt Edit (12.2 KiB, text/plain; charset="utf-8")
Lsusb.txt Edit (633 bytes, text/plain; charset="utf-8")
ProcCpuinfo.txt Edit (9.0 KiB, text/plain; charset="utf-8")
ProcEnviron.txt Edit (325 bytes, text/plain; charset="utf-8")
ProcInterrupts.txt Edit (4.6 KiB, text/plain; charset="utf-8")
ProcModules.txt Edit (6.9 KiB, text/plain; charset="utf-8")
PulseList.txt Edit (26.2 KiB, text/plain; charset="utf-8")
RfKill.txt Edit (182 bytes, text/plain; charset="utf-8")
UdevDb.txt Edit (230.3 KiB, text/plain; charset="utf-8")
WifiSyslog.txt Edit (107.7 KiB, text/plain; charset="utf-8")

Revision history for this message

Brad Figg (brad-figg) wrote on 2017-02-22: Status changed to Confirmed

This change was made by a bot.

Changed in linux (Ubuntu):
status:	New → Confirmed

Revision history for this message

Joseph Salisbury (jsalisbury) wrote on 2017-02-22:

Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.10 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.10

Changed in linux (Ubuntu):
importance:	Undecided → Medium
status:	Confirmed → Incomplete

Revision history for this message

Martin Vysny (vyzivus) wrote on 2017-02-23:

Thank you for the tip! Actually the CPU/GPU is pretty new, so the support definitely improved since kernel 4.4 (I think that the support for this GPU has been added in 4.3; kernel 4.4 had artifacts of hiding mouse cursor, 4.8 works pretty decently, apart from the abovementioned reported issue).

Installed 4.10 as suggested: Linux mavi-vaadin 4.10.0-041000-generic #201702191831 SMP Sun Feb 19 23:33:19 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
Unfortunately the issue persists - once the primary display (laptop display) is turned off, secondary display FPS drops to 1-0.5 FPS and cannot be reasonably worked with.

tags:	added: kernel-bug-exists-upstream
Changed in linux (Ubuntu):
status:	Incomplete → Confirmed

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UI performance slow (0,5fps) when I disable primary notebook display

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Ubuntu
linux package