| Summary: | [NVAA] nouveau: tearing regression | ||||||
|---|---|---|---|---|---|---|---|
| Product: | xorg | Reporter: | Alexander Stein <alexanders83> | ||||
| Component: | Driver/nouveau | Assignee: | Nouveau Project <nouveau> | ||||
| Status: | RESOLVED NOTABUG | QA Contact: | Xorg Project Team <xorg-team> | ||||
| Severity: | normal | ||||||
| Priority: | medium | ||||||
| Version: | unspecified | ||||||
| Hardware: | Other | ||||||
| OS: | All | ||||||
| Whiteboard: | |||||||
| i915 platform: | i915 features: | ||||||
| Attachments: |
|
||||||
This "regression" is related to vblanking. I just had to enable GLXVBlank in xorg configuration. It seems vblanking was enabled before that given change (unintentionally?). |
Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.
Created attachment 94915 [details] git bisect log I noticed mplayer showing some tearing starting from kernel version v3.10.7 which wasn't there in v3.8. I could bisect it down to commit 1d7c71a3e2f77336df536855b0efd2dc5bdeb41b (drm/nouveau/disp: port vblank handling to event interface). Unfortunately c7d73f6a8ad71f9d9f58c86981322c6e48093a4f introduced a NULL-pointer dereference regression. Luckily I found 526810adb93554e17bdb83023a01cfa8758960b2 which fixes that. Doing the bisect I had to cherry-pick that each time until I tried commit 1d7c71a. At this commit I additionally need to cherry-pick c8f28f8. After adding those 2 commits I could run mplayer again and could clearly see the tearing effect. My hardware: 02:00.0 VGA compatible controller: NVIDIA Corporation C77 [GeForce 8300] (rev a2) (prog-if 00 [VGA controller]) Subsystem: ASUSTeK Computer Inc. Device 82f2 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0 Interrupt: pin A routed to IRQ 20 Region 0: Memory at fd000000 (32-bit, non-prefetchable) [size=16M] Region 1: Memory at f0000000 (64-bit, prefetchable) [size=128M] Region 3: Memory at fa000000 (64-bit, prefetchable) [size=32M] Region 5: I/O ports at ec00 [size=128] Expansion ROM at feae0000 [disabled] [size=128K] Capabilities: [60] Power Management version 2 Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-) Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME- Capabilities: [68] MSI: Enable- Count=1/1 Maskable- 64bit+ Address: 0000000000000000 Data: 0000 Kernel driver in use: nouveau Kernel modules: nouveau