continuously receive the message [drm:radeon_acpi_init] "ERROR" Cannot find a backlight controller

[Eugene]

[ 15.021664] rt3290sta: module verification failed: signature and/or required key missing - tainting kernel
[ 16.182412] EXT4-fs (sda2): re-mounted. Opts: errors=remount-ro
[ 24.058014] [drm:radeon_acpi_init] *ERROR* Cannot find a backlight controller
[ 29.933827] init: failsafe main process (718) killed by TERM signal
[ 32.111669] /var/lib/dkms/rt3290sta/2.6.0.0/build/src/os/linux/../../common/cmm_asic.c:2608 assert KeyIdx < 4failed
[ 32.111678] /var/lib/dkms/rt3290sta/2.6.0.0/build/src/os/linux/../../common/cmm_asic.c:2608 assert KeyIdx < 4failed

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-46-generic 3.13.0-46.77
ProcVersionSignature: Ubuntu 3.13.0-46.77-generic 3.13.11-ckt15
Uname: Linux 3.13.0-46-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.7
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: eugene 2496 F.... pulseaudio
 /dev/snd/controlC0: eugene 2496 F.... pulseaudio
CurrentDesktop: Unity
Date: Wed Mar 11 19:02:59 2015
HibernationDevice: RESUME=UUID=b90f8319-66ea-4e2b-8b49-1434ed1e6f6d
InstallationDate: Installed on 2015-03-05 (6 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
MachineType: Hewlett-Packard HP Pavilion 15 Notebook PC
ProcFB:
 0 radeondrmfb
 1 radeondrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-46-generic root=UUID=e71f0d22-9d1d-4165-a8f5-bd2ac86c28b7 ro quiet splash acpi_backlight=vendor vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-46-generic N/A
 linux-backports-modules-3.13.0-46-generic N/A
 linux-firmware 1.127.11
RfKill:

SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/03/2014
dmi.bios.vendor: Insyde
dmi.bios.version: F.15
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 216C
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 30.25
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnInsyde:bvrF.15:bd06/03/2014:svnHewlett-Packard:pnHPPavilion15NotebookPC:pvr0887100000005E00000600000:rvnHewlett-Packard:rn216C:rvr30.25:cvnHewlett-Packard:ct10:cvrChassisVersion:
dmi.product.name: HP Pavilion 15 Notebook PC
dmi.product.version: 0887100000005E00000600000
dmi.sys.vendor: Hewlett-Packard

[Joseph Salisbury (jsalisbury)]

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 v4.0 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'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-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/v4.0-rc3-vivid/

[Brad Figg (brad-figg)]

This change was made by a bot.

[Eugene (7w-u)]

after loading appeared 2 errors

"System program problem detected

Do you want to report the problem now?"

and

[ 7.473000] EXT4-fs (sda2): re-mounted. Opts: errors=remount-ro
[ 9.711091] rt3290sta: module verification failed: signature and/or required key missing - tainting kernel
[ 11.457278] init: failsafe main process (593) killed by TERM signal
[ 16.278559] /var/lib/dkms/rt3290sta/2.6.0.0/build/src/os/linux/../../common/cmm_asic.c:2608 assert KeyIdx < 4failed
[ 16.278563] /var/lib/dkms/rt3290sta/2.6.0.0/build/src/os/linux/../../common/cmm_asic.c:2608 assert KeyIdx < 4failed
[ 19.152514] radeon 0000:01:00.0: Direct firmware load for radeon/hainan_pfp.bin failed with error -2
[ 19.200504] radeon 0000:01:00.0: Direct firmware load for radeon/hainan_me.bin failed with error -2
[ 19.268603] radeon 0000:01:00.0: Direct firmware load for radeon/hainan_ce.bin failed with error -2
[ 19.279634] radeon 0000:01:00.0: Direct firmware load for radeon/hainan_rlc.bin failed with error -2
[ 19.361224] radeon 0000:01:00.0: Direct firmware load for radeon/hainan_mc.bin failed with error -2
[ 19.431970] radeon 0000:01:00.0: Direct firmware load for radeon/hainan_smc.bin failed with error -2
[ 20.340623] [drm:radeon_acpi_init [radeon]] *ERROR* Cannot find a backlight controller