This week I tried HDMI again on my system, and noticed it was completely broken.
Got just no signal on my screen.
I knew it was working some months (and upgrades) ago.
After testing I found out the issue was introduced between kernel v3.14 and v3.15.
Situation:
Insert HDMI cable into my laptop, and no signal on the external display.
The dmesg fills with errors also:
[ 186.210622] nouveau E[ PDISP][0000:01:00.0] INVALID_STATE [UNK08] chid 0 mthd 0x0080 data 0x00000000
[ 186.210627] nouveau E[ PDISP][0000:01:00.0] Core:
[ 186.210634] nouveau E[ PDISP][0000:01:00.0] 0x0084: 0x5dc34da1 -> 0x80000000
[ 186.210640] nouveau E[ PDISP][0000:01:00.0] 0x0088: 0x00000000
etc.
After some git bisect playtime, I found out the following commit caused the issue:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/drivers/gpu/drm/nouveau?id=05c63c2ff23a80b654d6c088ac3ba21628db0173
So I went back to stable 3.16 (Ubuntu Utopic version), and did a git revert for that commit.
And yep, HDMI output was working again, and no more nouveau errors in dmesg.
My device:
[ 30.823267] nouveau [ DEVICE][0000:01:00.0] BOOT0 : 0x0c1a00a1
[ 30.823269] nouveau [ DEVICE][0000:01:00.0] Chipset: GF108 (NVC1)
[ 30.823270] nouveau [ DEVICE][0000:01:00.0] Family : NVC0
Laptop dell xps 15 l502x
So this can be fixed with just reverting this commit. Else this is an annoying regression in Utopic.
---
ApportVersion: 2.14.7-0ubuntu2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: jean-louis 3531 F.... pulseaudio
CurrentDesktop: GNOME
DistroRelease: Ubuntu 14.10
HibernationDevice: RESUME=UUID=633b79c4-1f68-4dd5-be23-b297eed028cd
InstallationDate: Installed on 2011-07-14 (1177 days ago)
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha amd64 (20110705.1)
MachineType: Dell Inc. Dell System XPS L502X
Package: linux (not installed)
ProcFB:
0 inteldrmfb
1 nouveaufb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.16.0-20-generic root=/dev/mapper/ubuntu-root_crypt ro quiet splash modeset=1 pcie_aspm=force i915.i915_enable_rc6=1 i915.i915_enable_fbc=1 i915.lvds_downclock=1 vt.handoff=7
ProcVersionSignature: Ubuntu 3.16.0-20.27-generic 3.16.3
RelatedPackageVersions:
linux-restricted-modules-3.16.0-20-generic N/A
linux-backports-modules-3.16.0-20-generic N/A
linux-firmware 1.134
Tags: utopic
Uname: Linux 3.16.0-20-generic x86_64
UpgradeStatus: Upgraded to utopic on 2014-09-15 (18 days ago)
UserGroups: adm admin bacula cdrom dialout libvirtd lpadmin plugdev sambashare wireshark
_MarkForUpload: True
dmi.bios.date: 09/07/2012
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A12
dmi.board.name: 0NJT03
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: 0.1
dmi.modalias: dmi:bvnDellInc.:bvrA12:bd09/07/2012:svnDellInc.:pnDellSystemXPSL502X:pvr:rvnDellInc.:rn0NJT03:rvrA00:cvnDellInc.:ct8:cvr0.1:
dmi.product.name: Dell System XPS L502X
dmi.sys.vendor: Dell Inc.
This week I tried HDMI again on my system, and noticed it was completely broken.
Got just no signal on my screen.
I knew it was working some months (and upgrades) ago.
After testing I found out the issue was introduced between kernel v3.14 and v3.15.
Situation:
Insert HDMI cable into my laptop, and no signal on the external display.
The dmesg fills with errors also:
[ 186.210622] nouveau E[ PDISP][
[ 186.210627] nouveau E[ PDISP][
[ 186.210634] nouveau E[ PDISP][
[ 186.210640] nouveau E[ PDISP][
etc.
After some git bisect playtime, I found out the following commit caused the issue:
https:/
So I went back to stable 3.16 (Ubuntu Utopic version), and did a git revert for that commit.
And yep, HDMI output was working again, and no more nouveau errors in dmesg.
My device:
[ 30.823267] nouveau [ DEVICE]
[ 30.823269] nouveau [ DEVICE]
[ 30.823270] nouveau [ DEVICE]
Laptop dell xps 15 l502x