git commit: 4eaab17aec8ea66428087065901324f56df9020e
I'm seeing parts of the GUI blink between updated buffer and some semi-corrupted earlier buffer at times. This usually happens on youtube fullscreen video playback (flash/html5? in Firefox), but sometimes seen without fullscreen video (just now happened in Xfce terminal on "git log" command -- was flipping between mostly-blank and screenfull of log for a few seconds).
dual video hardware, bumblebee (usually keep nvidia card disabled):
00:02.0 VGA compatible controller : Intel Corporation 4th Gen Core Processor Integrated Graphics Controller [8086:0416] (rev 06) (prog-if 00 [VGA controller])
Subsystem: CLEVO/KAPOK Computer Device [1558:5281]
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-
Interrupt: pin A routed to IRQ 35
Region 0: Memory at f7400000 (64-bit, non-prefetchable) [size=4M]
Region 2: Memory at d0000000 (64-bit, prefetchable) [size=256M]
Region 4: I/O ports at f000 [size=64]
Expansion ROM at <unassigned> [disabled]
Capabilities:  MSI: Enable+ Count=1/1 Maskable- 64bit-
Address: fee00018 Data: 0000
Capabilities: [d0] 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: [a4] PCI Advanced Features
AFCap: TP+ FLR+
Kernel driver in use: i915
Kernel modules: i915
01:00.0 VGA compatible controller : NVIDIA Corporation GK104M [GeForce GTX 870M] [10de:1199] (rev ff) (prog-if ff)
!!! Unknown header type 7f
Kernel modules: nouveau, nvidia
Another bug related to fullscreen video (no idea if related/same): at one bootup, horizontal lines showed up as noise at some [random?] locations in video clip during playback. At another bootup, no problem..
Updating to today's commit, might make a difference..
update didn't make a difference, still getting blinking between 2 states
Upgraded to Fedora 24, the fullscreen video corruption is gone -- so was unrelated
This is affecting a lot more than I thought earlier -- I often get this effect when a window is maximized on one screen (the other screen starts blinking.. whole or part). It's very disruptive to normal work (e.g. full screen browser in one screen & terminal window in another)
If there's any workaround I can apply, please let me know asap!