Launchpad has imported 2 comments from the remote bug at https://bugs.freedesktop.org/show_bug.cgi?id=84203.
If you reply to an imported comment from within Launchpad, your comment will be sent to the remote bug automatically. Read more about Launchpad's inter-bugtracker facilities at https://help.launchpad.net/InterBugTracking. ------------------------------------------------------------------------ On 2014-09-22T22:40:48+00:00 Jean-Louis Dupond wrote: 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 Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1374607/comments/0 ------------------------------------------------------------------------ On 2014-09-22T22:46:52+00:00 Jean-Louis Dupond wrote: Created attachment 106697 full dmesg Attached a full dmesg. The last lines are when I stop lightdm, and runpm stops the nvidia card. This also causes shutdown to hang. Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1374607/comments/1 ** Changed in: linux Status: Unknown => Confirmed ** Changed in: linux Importance: Unknown => Medium -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1374607 Title: nouveau - HDMI gives no more signal since 3.15 (optimus) Status in The Linux Kernel: Confirmed Status in “linux” package in Ubuntu: New Bug description: 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. To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1374607/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
