Bug#819576: linux-image-4.4.0-0.bpo.1-amd64: Brightness slowdown - Changing brightness takes some seconds and causes system slowdown

[Leonardo Santana Vieira]

I uninstalled the 3 modules mentioned from kernel 4.4 and it didn't solve
the problem.

"uname -a" command result:
Linux debian 4.4.0-0.bpo.1-amd64 #1 SMP Debian 4.4.6-1~bpo8+1 (2016-03-20)
x86_64 GNU/Linux

"dkms status" command result:
bbswitch, 0.8, 3.16.0-4-amd64, x86_64: installed
bbswitch, 0.8, 4.3.0-0.bpo.1-amd64, x86_64: installed
nvidia-current, 352.79, 3.16.0-4-amd64, x86_64: installed
nvidia-current, 352.79, 4.3.0-0.bpo.1-amd64, x86_64: installed
virtualbox, 5.0.16, 3.16.0-4-amd64, x86_64: installed
virtualbox, 5.0.16, 4.3.0-0.bpo.1-amd64, x86_64: installed


2016-03-30 16:50 GMT-03:00 Ben Hutchings :

> Control: tag -1 moreinfo
>
> On Wed, 2016-03-30 at 14:14 -0300, Leonardo Santana Vieira wrote:
> > Package: src:linux
> > Version: 4.4.6-1~bpo8+1
> > Severity: important
> >
> > Dear Maintainer,
> >
> > After kernel upgrade, changing brightness takes some seconds and causes
> system
> > slowdown if i try to change more than one level at a time. This problem
> does
> > not happen in the other kernel packages i have installed(3.16, 4.3). I'm
> using
> > Gnome desktop, the problem happens when i try the change through the
> menu at
> > the top bar and especially if i try using fn keys to do it. If a hold
> fn+f5 or
> > f6 all the way to minimum or maximum, the action causes severe slowdown
> in the
> > system making it unusable for some time. I have theses modules installed
> in all
> > the kernel packages as can be seen below the result of "dkms status"
> command.
> >
> > bbswitch, 0.8, 3.16.0-4-amd64, x86_64: installed
> > bbswitch, 0.8, 4.3.0-0.bpo.1-amd64, x86_64: installed
> > bbswitch, 0.8, 4.4.0-0.bpo.1-amd64, x86_64: installed
> > nvidia-current, 352.79, 3.16.0-4-amd64, x86_64: installed
> > nvidia-current, 352.79, 4.3.0-0.bpo.1-amd64, x86_64: installed
> > nvidia-current, 352.79, 4.4.0-0.bpo.1-amd64, x86_64: installed
> > virtualbox, 5.0.16, 3.16.0-4-amd64, x86_64: installed
> > virtualbox, 5.0.16, 4.3.0-0.bpo.1-amd64, x86_64: installed
> > virtualbox, 5.0.16, 4.4.0-0.bpo.1-amd64, x86_64: installed
> [...]
>
> Please test without these modules installed.
>
> Ben.
>
> --
> Ben Hutchings
> Tomorrow will be cancelled due to lack of interest.

Bug#819576: linux-image-4.4.0-0.bpo.1-amd64: Brightness slowdown - Changing brightness takes some seconds and causes system slowdown

[Ben Hutchings]

Control: tag -1 moreinfo

On Wed, 2016-03-30 at 14:14 -0300, Leonardo Santana Vieira wrote:
> Package: src:linux
> Version: 4.4.6-1~bpo8+1
> Severity: important
> 
> Dear Maintainer,
> 
> After kernel upgrade, changing brightness takes some seconds and causes system
> slowdown if i try to change more than one level at a time. This problem does
> not happen in the other kernel packages i have installed(3.16, 4.3). I'm using
> Gnome desktop, the problem happens when i try the change through the menu at
> the top bar and especially if i try using fn keys to do it. If a hold fn+f5 or
> f6 all the way to minimum or maximum, the action causes severe slowdown in the
> system making it unusable for some time. I have theses modules installed in 
> all
> the kernel packages as can be seen below the result of "dkms status" command.
>
> bbswitch, 0.8, 3.16.0-4-amd64, x86_64: installed
> bbswitch, 0.8, 4.3.0-0.bpo.1-amd64, x86_64: installed
> bbswitch, 0.8, 4.4.0-0.bpo.1-amd64, x86_64: installed
> nvidia-current, 352.79, 3.16.0-4-amd64, x86_64: installed
> nvidia-current, 352.79, 4.3.0-0.bpo.1-amd64, x86_64: installed
> nvidia-current, 352.79, 4.4.0-0.bpo.1-amd64, x86_64: installed
> virtualbox, 5.0.16, 3.16.0-4-amd64, x86_64: installed
> virtualbox, 5.0.16, 4.3.0-0.bpo.1-amd64, x86_64: installed
> virtualbox, 5.0.16, 4.4.0-0.bpo.1-amd64, x86_64: installed
[...]

Please test without these modules installed.

Ben.

-- 
Ben Hutchings
Tomorrow will be cancelled due to lack of interest.

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Bug#819576: linux-image-4.4.0-0.bpo.1-amd64: Brightness slowdown - Changing brightness takes some seconds and causes system slowdown

[Leonardo Santana Vieira]

Package: src:linux
Version: 4.4.6-1~bpo8+1
Severity: important

Dear Maintainer,

After kernel upgrade, changing brightness takes some seconds and causes system
slowdown if i try to change more than one level at a time. This problem does
not happen in the other kernel packages i have installed(3.16, 4.3). I'm using
Gnome desktop, the problem happens when i try the change through the menu at
the top bar and especially if i try using fn keys to do it. If a hold fn+f5 or
f6 all the way to minimum or maximum, the action causes severe slowdown in the
system making it unusable for some time. I have theses modules installed in all
the kernel packages as can be seen below the result of "dkms status" command.

bbswitch, 0.8, 3.16.0-4-amd64, x86_64: installed
bbswitch, 0.8, 4.3.0-0.bpo.1-amd64, x86_64: installed
bbswitch, 0.8, 4.4.0-0.bpo.1-amd64, x86_64: installed
nvidia-current, 352.79, 3.16.0-4-amd64, x86_64: installed
nvidia-current, 352.79, 4.3.0-0.bpo.1-amd64, x86_64: installed
nvidia-current, 352.79, 4.4.0-0.bpo.1-amd64, x86_64: installed
virtualbox, 5.0.16, 3.16.0-4-amd64, x86_64: installed
virtualbox, 5.0.16, 4.3.0-0.bpo.1-amd64, x86_64: installed
virtualbox, 5.0.16, 4.4.0-0.bpo.1-amd64, x86_64: installed



-- Package-specific info:
** Version:
Linux version 4.4.0-0.bpo.1-amd64 (debian-ker...@lists.debian.org) (gcc version 
4.9.2 (Debian 4.9.2-10) ) #1 SMP Debian 4.4.6-1~bpo8+1 (2016-03-20)

** Command line:
BOOT_IMAGE=/boot/vmlinuz-4.4.0-0.bpo.1-amd64 
root=UUID=34333935-6a2e-401e-8284-fbd915a5c247 ro quiet

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

** Kernel log:
[3.046002] [drm:cpt_irq_handler [i915]] *ERROR* PCH transcoder A FIFO 
underrun
[3.088769] clocksource: Switched to clocksource tsc
[3.290615] Adding 11718652k swap on /dev/sda2.  Priority:-1 extents:1 
across:11718652k FS
[3.339649] uvcvideo: Found UVC 1.00 device USB Camera (13d3:5165)
[3.350828] input: USB Camera as 
/devices/pci:00/:00:1a.0/usb3/3-1/3-1.3/3-1.3:1.0/input/input18
[3.350904] usbcore: registered new interface driver uvcvideo
[3.350904] USB Video Class driver (1.1.1)
[3.572536] pstore: Registered efi as persistent store backend
[3.587952] Console: switching to colour frame buffer device 170x48
[3.590360] i915 :00:02.0: fb0: inteldrmfb frame buffer device
[3.601464] intel_rapl: Found RAPL domain package
[3.601467] intel_rapl: Found RAPL domain core
[3.601468] intel_rapl: Found RAPL domain uncore
[3.691816] FAT-fs (sda1): utf8 is not a recommended IO charset for FAT 
filesystems, filesystem will be case sensitive!
[3.710231] psmouse serio4: elantech: assuming hardware version 4 (with 
firmware version 0x361f01)
[3.723702] psmouse serio4: elantech: Synaptics capabilities query result 
0x00, 0x15, 0x0c.
[3.737244] psmouse serio4: elantech: Elan sample query result 03, 23, 75
[3.805084] input: ETPS/2 Elantech Touchpad as 
/devices/platform/i8042/serio4/input/input12
[3.969421] EXT4-fs (sda3): mounted filesystem with ordered data mode. Opts: 
(null)
[4.014334] systemd-journald[209]: Received request to flush runtime journal 
from PID 1
[4.015494] ip_tables: (C) 2000-2006 Netfilter Core Team
[4.023753] nf_conntrack version 0.5.0 (65536 buckets, 262144 max)
[4.033615] ip6_tables: (C) 2000-2006 Netfilter Core Team
[4.133437] RPC: Registered named UNIX socket transport module.
[4.133441] RPC: Registered udp transport module.
[4.133442] RPC: Registered tcp transport module.
[4.133443] RPC: Registered tcp NFSv4.1 backchannel transport module.
[4.136723] FS-Cache: Loaded
[4.143627] FS-Cache: Netfs 'nfs' registered for caching
[4.150812] Installing knfsd (copyright (C) 1996 o...@monad.swb.de).
[4.227984] vboxdrv: Found 4 processor cores
[4.230014] bbswitch: version 0.8
[4.230022] bbswitch: Found integrated VGA device :00:02.0: 
\_SB_.PCI0.GFX0
[4.230028] bbswitch: Found discrete VGA device :01:00.0: 
\_SB_.PCI0.PEG0.PEGP
[4.230040] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type 
mismatch - Found [Buffer], ACPI requires [Package] (20150930/nsarguments-95)
[4.230149] bbswitch: detected an Optimus _DSM function
[4.230161] bbswitch: Succesfully loaded. Discrete card :01:00.0 is on
[4.232850] bbswitch: disabling discrete graphics
[4.232864] ACPI Warning: \_SB_.PCI0.PEG0.PEGP._DSM: Argument #4 type 
mismatch - Found [Buffer], ACPI requires [Package] (20150930/nsarguments-95)
[4.243924] vboxdrv: TSC mode is Invariant, tentative frequency 1696141449 Hz
[4.243927] vboxdrv: Successfully loaded version 5.0.16_Debian (interface 
0x0024)
[4.251583] VBoxNetFlt: Successfully started.
[4.259276] VBoxNetAdp: Successfully started.
[4.267229] VBoxPciLinuxInit
[4.270773] vboxpci: IOMMU not found (not registered)
[4.453681] r8169 :04:00.2: firmware: direct-loading firmware 
rtl_nic/rtl8411-1.fw
[4.542816] r8169