Black screen on startup after HWE stack update on Ubuntu 14.04 LTS [Radeon R7 graphics]
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
xorg (Ubuntu) |
New
|
Undecided
|
Unassigned |
Bug Description
After updating the HWE stack on Ubuntu 14.04 LTS, my computer now regularly boots to a black screen upon startup. I briefly see the purple screen (but no plymouth), and then nothing. You can hear the ubuntu drum roll, though, and I can reboot using the alt+Sysrq+B option.
Adding the nomodeset parameter in GRUB offers a solution of sorts, but the computer boots with Gallium 0.4 on llvmpipe graphics, which makes gaming basically impossible. I can still boot regularly using the 3.16.0-77-generic kernel saved in GRUB.
Other info:
1) I tried an Ubuntu live USB stick with both 14.04.5 on it and then 16.04 and got the same problem.
2) My UEFI firmware is up-to-date as of 1 or 2 days ago.
3) The kernel in question is 4.4.0-36-generic.
4) Ubuntu release: 14.04.5 LTS
5) I have never installed the fglrx driver—I have always used the open-source driver.
6) My exact GPU: AMD A10-7700K Radeon R7 (Kaveri).
7) I'm not sure that the dmesg log automatically attached by apport will be helpful because of the "nomodeset" parameter, so I have attached a dmesg log grabbed from a failed boot. With guidance, I can do the same for other relevant logs.
Hope that's helpful!
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: xorg 1:7.7+1ubuntu8.1
ProcVersionSign
Uname: Linux 4.4.0-36-generic x86_64
.tmp.unity.
ApportVersion: 2.14.1-0ubuntu3.21
Architecture: amd64
CompizPlugins: No value set for `/apps/
CompositorRunning: compiz
CompositorUnred
CompositorUnred
CurrentDesktop: Unity
Date: Tue Sep 13 21:46:45 2016
DistUpgraded: 2016-08-26 20:07:12,800 DEBUG enabling apt cron job
DistroCodename: trusty
DistroVariant: ubuntu
ExtraDebuggingI
GraphicsCard:
Advanced Micro Devices, Inc. [AMD/ATI] Kaveri [Radeon R7 Graphics] [1002:1313] (prog-if 00 [VGA controller])
Subsystem: ASRock Incorporation Device [1849:1313]
InstallationDate: Installed on 2015-06-24 (447 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
ProcKernelCmdLine: BOOT_IMAGE=
Renderer: Software
SourcePackage: xorg
UpgradeStatus: Upgraded to trusty on 2016-08-27 (18 days ago)
dmi.bios.date: 03/15/2016
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P2.30
dmi.board.name: FM2A78M-HD+ R2.0
dmi.board.vendor: ASRock
dmi.chassis.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.
dmi.modalias: dmi:bvnAmerican
dmi.product.name: To Be Filled By O.E.M.
dmi.product.
dmi.sys.vendor: To Be Filled By O.E.M.
version.compiz: compiz 1:0.9.11.
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.67-
version.
version.
version.
version.
version.
version.
version.
version.
xserver.bootTime: Tue Sep 13 21:07:07 2016
xserver.configfile: default
xserver.errors:
open /dev/dri/card0: No such file or directory
open /dev/dri/card0: No such file or directory
Screen 0 deleted because of no matching config section.
Screen 0 deleted because of no matching config section.
AIGLX: reverting to software rendering
xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
xserver.version: 2:1.18.
Accidentally submitted this bug twice . . . Not sure how to delete the duplicate.