Image flickers with PageFlip in many apps e.g. glxgears and True Combat Elite SW: xf86-video-intel 1.9.94, xorg-server 1.2.99.905, Mesa git, DRM git HW: 945GM It doesn't happen with xf86-video-intel 1.7.4 and xorg-server 1.2.0.
Created attachment 9503 [details] Xorg.log
Created attachment 9504 [details] xorg.conf
I assume this only happens with triple buffering as well as page flipping; I fixed a problem like this recently in Mesa git, which commit are you at?
I tested: Mesa commit 51a894e6ebc3412a6d634a7378806f137374b09a DRM commit 78034c06dfc0cd79cc47c2daa119ca3ee2a4fed4
Image flickers also with PageFlip enabled and TripleBuffer disabled.
I can't seem to reproduce this, but I just pushed some possibly related changes to git. If it still happens with current git, please attach the output of xrandr --verbose; with glxgears, does only the window flicker, or the whole screen?
Window flickers also with changes. Screen 0: minimum 320 x 200, current 1024 x 768, maximum 1024 x 1024 VGA disconnected (normal left inverted right) Identifier: 0x5c Timestamp: -784132709 Subpixel: unknown Clones: CRTCs: 0 LVDS connected 1024x768+0+0 normal (normal left inverted right) 304mm x 228mm Identifier: 0x5d Timestamp: -784132709 Subpixel: horizontal rgb Clones: CRTC: 1 CRTCs: 1 EDID_DATA: 00ffffffffffff0006af511700000000 010e0102801e17780a12e59152528927 24505400000001010101010101010101 01010101010164190040410026301888 360030e4100000180000000f00067708 ff010f052e2dff053f01000000fe0041 554f0a202020202020202020000000fe 00423135305847303156370a20200085 BACKLIGHT: 20780 (0x00000000) range: (0,20780) 1024x768 (0x5f) 65.0MHz h: width 1024 start 1048 end 1184 total 1344 skew 0 clock 48.4KHz v: height 768 start 771 end 777 total 806 clock 60.0Hz 800x600 (0x60) 40.0MHz h: width 800 start 840 end 968 total 1056 skew 0 clock 37.9KHz v: height 600 start 601 end 605 total 628 clock 60.3Hz 640x480 (0x61) 25.2MHz h: width 640 start 656 end 752 total 800 skew 0 clock 31.5KHz v: height 480 start 490 end 492 total 525 clock 59.9Hz TV disconnected (normal left inverted right) Identifier: 0x5e Timestamp: -784132709 Subpixel: unknown Clones: CRTCs: 0 1 BOTTOM: 37 (0x00000000) range: (0,100) RIGHT: 46 (0x00000000) range: (0,100) TOP: 36 (0x00000000) range: (0,100) LEFT: 54 (0x00000000) range: (0,100) TV_FORMAT: ????
Created attachment 9516 [details] [review] Possible fix Does this xf86-video-intel patch help?
No change. There is warning: patching file src/i830_dri.c Hunk #1 succeeded at 1686 (offset -55 lines).
Created attachment 9519 [details] [review] i915tex debugging patch Please provide the stderr output of running a GL app with this Mesa patch applied.
libGL warning: 3D driver claims to not support visual 0x63 glxgears - Page flipping active, pf_pipes=0x2 Vsync to pipe B
Flicker seems to depend on app. In some games e.g. ActionCube, it flickers only once per 20 seconds.
Created attachment 9557 [details] 7.2.0 Xorg.log
glxgears stderr with xorg 7.2.0: libGL warning: 3D driver claims to not support visual 0x5b Vsync to pipe B
(In reply to comment #14) > glxgears stderr with xorg 7.2.0: Pre-1.9.9x versions of the 2D driver lie, they don't actually support page flipping.
It seems to be fixed.
Bug appeared again after connecting LCD to VGA output. Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 1280 x 1280 VGA connected 1280x1024+0+0 normal (normal left inverted right) 338mm x 270mm Identifier: 0x5c Timestamp: -2130392817 Subpixel: unknown Clones: CRTC: 0 CRTCs: 0 EDID_DATA: 00ffffffffffff001e6d7444c8e10200 031101036a221b78eaaec5a2574a9c25 125054a56b80314f454f614f81800101 010101010101302a009851002a403070 1300520e1100001e000000fd00384b1e 530e000a202020202020000000fc004c 3137353348520a2020202020000000fc 00200a202020202020202020202000d3 1280x1024 (0x5f) 108.0MHz h: width 1280 start 1328 end 1440 total 1688 skew 0 clock 64.0KHz v: height 1024 start 1025 end 1028 total 1066 clock 60.0Hz 1280x1024 (0x60) 109.0MHz h: width 1280 start 1368 end 1496 total 1712 skew 0 clock 63.7KHz v: height 1024 start 1027 end 1034 total 1063 clock 59.9Hz 1024x768 (0x61) 65.0MHz h: width 1024 start 1048 end 1184 total 1344 skew 0 clock 48.4KHz v: height 768 start 771 end 777 total 806 clock 60.0Hz 800x600 (0x62) 40.0MHz h: width 800 start 840 end 968 total 1056 skew 0 clock 37.9KHz v: height 600 start 601 end 605 total 628 clock 60.3Hz 640x480 (0x63) 25.2MHz h: width 640 start 656 end 752 total 800 skew 0 clock 31.5KHz v: height 480 start 490 end 492 total 525 clock 60.0Hz LVDS connected 1024x768+0+0 normal (normal left inverted right) 304mm x 228mm Identifier: 0x5d Timestamp: -2130392817 Subpixel: horizontal rgb Clones: CRTC: 1 CRTCs: 1 EDID_DATA: 00ffffffffffff0006af511700000000 010e0102801e17780a12e59152528927 24505400000001010101010101010101 01010101010164190040410026301888 360030e4100000180000000f00067708 ff010f052e2dff053f01000000fe0041 554f0a202020202020202020000000fe 00423135305847303156370a20200085 BACKLIGHT: 20780 (0x00000000) range: (0,20780) 1024x768 (0x61) 65.0MHz h: width 1024 start 1048 end 1184 total 1344 skew 0 clock 48.4KHz v: height 768 start 771 end 777 total 806 clock 60.0Hz 800x600 (0x62) 40.0MHz h: width 800 start 840 end 968 total 1056 skew 0 clock 37.9KHz v: height 600 start 601 end 605 total 628 clock 60.3Hz 640x480 (0x64) 25.2MHz h: width 640 start 656 end 752 total 800 skew 0 clock 31.5KHz v: height 480 start 490 end 492 total 525 clock 59.9Hz TV disconnected (normal left inverted right) Identifier: 0x5e Timestamp: -2130392817 Subpixel: unknown Clones: CRTCs: 0 1 BOTTOM: 37 (0x00000000) range: (0,100) RIGHT: 46 (0x00000000) range: (0,100) TOP: 36 (0x00000000) range: (0,100) LEFT: 54 (0x00000000) range: (0,100) TV_FORMAT: ????
Created attachment 9945 [details] Xorg.log
Created attachment 9946 [details] xorg.conf
(In reply to comment #17) > Bug appeared again after connecting LCD to VGA output. Is the flicker (identical) on both outputs? Are you using sync-to-vblank?
I don't have access to external LCD at the moment. Both images looked same except resolution, when I was testing. I'm using following drirc file <driconf> <device screen="0" driver="i915"> <application name="Default"> <option name="force_s3tc_enable" value="false" /> <option name="fthrottle_mode" value="2" /> <option name="vblank_mode" value="0" /> <option name="allow_large_textures" value="1" /> </application> </device> <device screen="0" driver="i915tex"> <application name="Default"> <option name="force_s3tc_enable" value="false" /> <option name="fthrottle_mode" value="2" /> <option name="vblank_mode" value="0" /> <option name="allow_large_textures" value="1" /> </application> </device> </driconf>
I have external LCD connected. Image flickers same on both displays. mesa 6.5.3 xorg-server 1.3.0 xf86-video-intel git 0984c1fc0963f1ebab31f5b8fce5ad4c387fbd2c drm git 638c8087deecdf489eb4f70e82590d1be0c8c942
Created attachment 10155 [details] Xorg.log
Created attachment 10156 [details] kernel config
Image flickers also with mesa git 90630feeec52c6d4f2a17f75cdf3dab9f5baf923
Okay, I've been able to reproduce this. The problem occurs when Mesa generates damage events for buffer swaps and xf86-video-intel doesn't know to ignore them for synchronising the page contents. It'll be fixed when you build and run xf86-video-intel against xserver master (to become 1.4).
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.