Michiel Janssens, given you haven't heard anything on the list, feel
free to post this bug to
https://bugs.freedesktop.org/enter_bug.cgi?product=xorg&component=Driver/Radeon
.
** Description changed:
- This bug could be related to 1412730
- https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1412730
-
- Description of the issue:
- Booting up with displayport connected to Dell U2415 monitor, graphics and
input is responsive, also after logging in.
- However after resuming from suspend-to-ram, graphics are sluggish and input
has lag.
+ After resuming from suspend-to-ram, graphics on displayport connected Dell
U2415 monitor are sluggish and input has lag.
Examples:
- transition from unity greeter login locked status to unlocked status: 6
seconds (normal 1 second)
- transition from clicking dash and getting window: 2-3 seconds (normal <1
second)
- starting gedit: 4 seconds (normal <1 second)
- mouse lags, sometimes the pointer is still on the left side of the screen,
while it should be on the right
- input from keyboard lags, about 1-2 seconds (normal no lag)
- When unplugging the Displayport cable:
- all lag is gone
+ When unplugging the Displayport cable all lag is gone.
- When plugging displayport back in again:
- lag is back, same as before
+ When plugging displayport back in again lag is back, same as before.
- This issue only happens after suspend-resume.
- After a reboot, response of graphics and input is normal
- So two options to get rid of the lag: unplug DP or reboot.
+ After a reboot, response of graphics and input is normal. So two options
+ to get rid of the lag: unplug DP or reboot.
Further investigation:
Did a mainline kernel bisect:
From 3.13.11-ckt27 (good) to v4.3-wily (bad)
First bad is v4.0-rc1-vivid
Did a kernel commit bisect:
From 3.19 (good) to 4.0-rc1 (bad)
first bad commit: [e55bca26188e45f209597abf986c87cc5a49894a] radeon/audio:
enable DP audio
Commit bisect log is attached
- My daily baseline is 14.04.3 with HWE-Vivid.
- But because in the current HWE-Vivid this issue isn't present I'm reporting
it via Wily as you can see in the logs.
- I repeated testing of last good and first bad kernels on both 14.04.3 with
HWE-Vivid and 15.10.
- Exactly the same behaviour.
- I mention this because if this bug wont be fixed, it will still be there in
the upcoming HWE-Wily also.
- And if thats the case, I won't be able to suspend my laptop without this
issue.
+ WORKAROUND: radeon.audio=0
+ However, I'm not able to use audio over Displayport.
ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: linux-image-4.2.0-18-generic 4.2.0-18.22
ProcVersionSignature: Ubuntu 4.2.0-18.22-generic 4.2.3
Uname: Linux 4.2.0-18-generic x86_64
ApportVersion: 2.19.1-0ubuntu4
Architecture: amd64
AudioDevicesInUse:
- USERPID ACCESS COMMAND
- /dev/snd/controlC0: michiel1788 F pulseaudio
- /dev/snd/controlC1: michiel1788 F pulseaudio
+ USERPID ACCESS COMMAND
+ /dev/snd/controlC0: michiel1788 F pulseaudio
+ /dev/snd/controlC1: michiel1788 F pulseaudio
CurrentDesktop: Unity
Date: Thu Nov 12 22:08:27 2015
HibernationDevice: RESUME=UUID=d0de679a-8c90-4a25-a84a-8d3c25eb0a10
InstallationDate: Installed on 2015-10-31 (12 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
MachineType: Hewlett-Packard HP EliteBook 8740w
ProcFB: 0 radeondrmfb
ProcKernelCmdLine: BOOT_IMAGE=/@wily/boot/vmlinuz-4.2.0-18-generic
root=UUID=f16430cd-a447-4cf2-8f8b-ce233e03d462 ro rootflags=subvol=@wily quiet
splash vt.handoff=7
RelatedPackageVersions:
- linux-restricted-modules-4.2.0-18-generic N/A
- linux-backports-modules-4.2.0-18-generic N/A
- linux-firmware1.149.1
+ linux-restricted-modules-4.2.0-18-generic N/A
+ linux-backports-modules-4.2.0-18-generic N/A
+ linux-firmware1.149.1
SourcePackage: linux
UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/07/2014
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: 68CAD Ver. F.50
dmi.board.name: 1520
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 33.31
dmi.chassis.asset.tag: CNU1152Q9W
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias:
dmi:bvnHewlett-Packard:bvr68CADVer.F.50:bd07/07/2014:svnHewlett-Packard:pnHPEliteBook8740w:pvr:rvnHewlett-Packard:rn1520:rvrKBCVersion33.31:cvnHewlett-Packard:ct10:cvr:
dmi.product.name: HP EliteBook 8740w
dmi.sys.vendor: Hewlett-Packard
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1515776
Title:
1002:68a0 After suspend-resume graphics are sluggish and input lags
with displayport connected
To manage notifications about this bug go to:
https://bugs.launch
