I have problems with composite in plasma 5, it used to run smooth in kde4 despite of having very old hardware if i used proprietarily drivers (nvidia), do you have any suggestions?

No - your post contains like no information.
Not even problem description

I assume "it's too slow"?
Please paste the output of

Code: Select all

qdbus org.kde.KWin /KWin supportInformation


and maybe elaborate a bit on your actual problem.

Code: Select all

Version
=======
KWin version: 5.3.2
Qt Version: 5.5.0
Qt compile version: 5.4.2
XCB compile version: 1.11

Operation Mode: X11 only

Build Options
=============
KWIN_BUILD_DECORATIONS: yes
KWIN_BUILD_TABBOX: yes
KWIN_BUILD_ACTIVITIES: yes
HAVE_WAYLAND: yes
HAVE_WAYLAND_EGL: yes
HAVE_WAYLAND_CURSOR: yes
HAVE_XKB: yes
HAVE_INPUT: yes
HAVE_XCB_CURSOR: yes
HAVE_XCB_SYNC: yes
HAVE_X11_XCB: yes

X11
===
Vendor: The X.Org Foundation
Vendor Release: 11702000
Protocol Version/Revision: 11/0
SHAPE: yes; Version: 0x11
RANDR: yes; Version: 0x14
DAMAGE: yes; Version: 0x11
Composite: yes; Version: 0x4
RENDER: yes; Version: 0xb
XFIXES: yes; Version: 0x50
SYNC: yes; Version: 0x31
GLX: yes; Version: 0x0

Decoration
==========
Plugin: org.kde.breeze
Theme:
Blur: 0
onAllDesktopsAvailable: true
alphaChannelSupported: false
closeOnDoubleClickOnMenu: false
decorationButtonsLeft: 0, 2, 9, 7
decorationButtonsRight: 6, 3, 4, 5
borderSize: 0
gridUnit: 10
font: Oxygen-Sans,10,-1,0,50,0,0,0,0,0
smallSpacing: 2
largeSpacing: 10

Options
=======
focusPolicy: 0
nextFocusPrefersMouse: false
clickRaise: true
autoRaise: false
autoRaiseInterval: 0
delayFocusInterval: 0
shadeHover: false
shadeHoverInterval: 250
separateScreenFocus: false
placement: 4
focusPolicyIsReasonable: true
borderSnapZone: 10
windowSnapZone: 10
centerSnapZone: 0
snapOnlyWhenOverlapping: false
rollOverDesktops: true
focusStealingPreventionLevel: 1
legacyFullscreenSupport: false
operationTitlebarDblClick: 5000
operationMaxButtonLeftClick: 5000
operationMaxButtonMiddleClick: 5015
operationMaxButtonRightClick: 5014
commandActiveTitlebar1: 0
commandActiveTitlebar2: 30
commandActiveTitlebar3: 2
commandInactiveTitlebar1: 4
commandInactiveTitlebar2: 30
commandInactiveTitlebar3: 2
commandWindow1: 7
commandWindow2: 8
commandWindow3: 8
commandWindowWheel: 31
commandAll1: 10
commandAll2: 3
commandAll3: 14
keyCmdAllModKey: 16777251
showGeometryTip: false
condensedTitle: false
electricBorderMaximize: true
electricBorderTiling: true
electricBorderCornerRatio: 0.449999988
borderlessMaximizedWindows: false
killPingTimeout: 5000
hideUtilityWindowsForInactive: true
inactiveTabsSkipTaskbar: false
autogroupSimilarWindows: false
autogroupInForeground: true
compositingMode: 1
useCompositing: false
compositingInitialized: false
hiddenPreviews: 1
unredirectFullscreen: false
glSmoothScale: 2
colorCorrected: false
xrenderSmoothScale: false
maxFpsInterval: 16666666
refreshRate: 0
vBlankTime: 6000000
glStrictBinding: true
glStrictBindingFollowsDriver: true
glCoreProfile: false
glPreferBufferSwap: 97
glPlatformInterface: 1

Screen Edges
============
desktopSwitching: false
desktopSwitchingMovingClients: true
cursorPushBackDistance: 1x1
timeThreshold: 200
reActivateThreshold: 300
actionTopLeft: 0
actionTop: 0
actionTopRight: 0
actionRight: 0
actionBottomRight: 0
actionBottom: 0
actionBottomLeft: 0
actionLeft: 0

Screens
=======
Multi-Head: no
Active screen follows mouse:  no
Number of Screens: 1
Screen 0 Geometry: 0,0,1360x768

Compositing
===========
Compositing is not active

My hardware:
-AMD Sempron 140 @ 2.7GHz
-GeForce 7025 / nForce 630a
-1GB RAM

When i enable composite it's start working very slow, my mouse gets frozen very often, animations don't work, i can't open any program, i can barely move some windows and it freezes after a couple of mins

It's necessary to have the compositor running when dumping the supportInformation - otherwise it doesn't (cannot) provide the required information around the compositor.

Code: Select all

Version
=======
KWin version: 5.3.2
Qt Version: 5.5.0
Qt compile version: 5.4.2
XCB compile version: 1.11

Operation Mode: X11 only

Build Options
=============
KWIN_BUILD_DECORATIONS: yes
KWIN_BUILD_TABBOX: yes
KWIN_BUILD_ACTIVITIES: yes
HAVE_WAYLAND: yes
HAVE_WAYLAND_EGL: yes
HAVE_WAYLAND_CURSOR: yes
HAVE_XKB: yes
HAVE_INPUT: yes
HAVE_XCB_CURSOR: yes
HAVE_XCB_SYNC: yes
HAVE_X11_XCB: yes

X11
===
Vendor: The X.Org Foundation
Vendor Release: 11702000
Protocol Version/Revision: 11/0
SHAPE: yes; Version: 0x11
RANDR: yes; Version: 0x14
DAMAGE: yes; Version: 0x11
Composite: yes; Version: 0x4
RENDER: yes; Version: 0xb
XFIXES: yes; Version: 0x50
SYNC: yes; Version: 0x31
GLX: yes; Version: 0x0

Decoration
==========
Plugin: org.kde.breeze
Theme:
Blur: 0
onAllDesktopsAvailable: true
alphaChannelSupported: true
closeOnDoubleClickOnMenu: false
decorationButtonsLeft: 0, 2, 9, 7
decorationButtonsRight: 6, 3, 4, 5
borderSize: 0
gridUnit: 10
font: Oxygen-Sans,10,-1,0,50,0,0,0,0,0
smallSpacing: 2
largeSpacing: 10

Options
=======
focusPolicy: 0
nextFocusPrefersMouse: false
clickRaise: true
autoRaise: false
autoRaiseInterval: 0
delayFocusInterval: 0
shadeHover: false
shadeHoverInterval: 250
separateScreenFocus: false
placement: 4
focusPolicyIsReasonable: true
borderSnapZone: 10
windowSnapZone: 10
centerSnapZone: 0
snapOnlyWhenOverlapping: false
rollOverDesktops: true
focusStealingPreventionLevel: 1
legacyFullscreenSupport: false
operationTitlebarDblClick: 5000
operationMaxButtonLeftClick: 5000
operationMaxButtonMiddleClick: 5015
operationMaxButtonRightClick: 5014
commandActiveTitlebar1: 0
commandActiveTitlebar2: 30
commandActiveTitlebar3: 2
commandInactiveTitlebar1: 4
commandInactiveTitlebar2: 30
commandInactiveTitlebar3: 2
commandWindow1: 7
commandWindow2: 8
commandWindow3: 8
commandWindowWheel: 31
commandAll1: 10
commandAll2: 3
commandAll3: 14
keyCmdAllModKey: 16777251
showGeometryTip: false
condensedTitle: false
electricBorderMaximize: true
electricBorderTiling: true
electricBorderCornerRatio: 0.449999988
borderlessMaximizedWindows: false
killPingTimeout: 5000
hideUtilityWindowsForInactive: true
inactiveTabsSkipTaskbar: false
autogroupSimilarWindows: false
autogroupInForeground: true
compositingMode: 1
useCompositing: true
compositingInitialized: true
hiddenPreviews: 1
unredirectFullscreen: false
glSmoothScale: 2
colorCorrected: false
xrenderSmoothScale: false
maxFpsInterval: 16666666
refreshRate: 0
vBlankTime: 6000000
glStrictBinding: false
glStrictBindingFollowsDriver: true
glCoreProfile: false
glPreferBufferSwap: 0
glPlatformInterface: 1

Screen Edges
============
desktopSwitching: false
desktopSwitchingMovingClients: true
cursorPushBackDistance: 1x1
timeThreshold: 200
reActivateThreshold: 300
actionTopLeft: 0
actionTop: 0
actionTopRight: 0
actionRight: 0
actionBottomRight: 0
actionBottom: 0
actionBottomLeft: 0
actionLeft: 0

Screens
=======
Multi-Head: no
Active screen follows mouse:  no
Number of Screens: 1
Screen 0 Geometry: 0,0,1360x768

Compositing
===========
Compositing is active
Compositing Type: OpenGL
OpenGL vendor string: NVIDIA Corporation
OpenGL renderer string: GeForce 7025 / nForce 630a/integrated/SSE2/3DNOW!
OpenGL version string: 2.1.2 NVIDIA 304.125
OpenGL platform interface: GLX
OpenGL shading language version string: 1.20 NVIDIA via Cg compiler
Driver: NVIDIA
Driver version: 304.125
GPU class: NV40/G70
OpenGL version: 2.1.2
GLSL version: 1.20
X server version: 1.17.2
Linux kernel version: 4.2
Direct rendering: Requires strict binding: no
GLSL shaders:  limited
Texture NPOT support:  yes
Virtual Machine:  no
OpenGL 2 Shaders are used
Painting blocks for vertical retrace:  no

Loaded Effects:
---------------
coverswitch

Currently Active Effects:
-------------------------

Effect Settings:
----------------
coverswitch:
animationDuration: 1
animateSwitch: true
animateStart: true
animateStop: true
reflection: true
windowTitle: true
zPosition: 900
primaryTabBox: false
secondaryTabBox: false

Actually, only the coverswitch effect seems loaded (and animation time is set to instant)

You'll likely also now be running plasmashell (from KDE5)
Set the scale method to "Smooth", but there's little hope

In "KDE we don't call it 5", there're many OpenGL 2.0 contexts (ever plasmashell window is, even the tooltips) and the OpenGL 1.3 backend was removed from KWin. The bottleneck will then likely be the rather limited shared memory of the IGP (yes, it was much back then. I know.)

Try to kill the "plasmashell" process (that's your desktop) and see whether the composited environment becomes more responsive (though that's oc. no solution, but will get you an idea whether the problem is rather in memory consuption or GLSL)

Do not use the "blur" or "contrast" effects (both will increase the memory requirements)

Ultimately, you may have to use the xrender compositor.
It's much lighter on resources and nvidia has very good xrender acceleration.
You'll however loose some effects (notably coverswitch) since there's no frustum concept in xrender (it's "2D")

I also has started to have problems with compositing (it doesn't work) in plasma 5 just right after update from the latest kde-4 version.

Code: Select all

$ qdbus org.kde.KWin /Compositor suspend

$ qdbus org.kde.KWin /Compositor resume

$ qdbus org.kde.KWin /KWin supportInformation
KWin Support Information:
The following information should be used when requesting support on e.g. http://forum.kde.org.
It provides information about the currently running instance, which options are used,
what OpenGL driver and which effects are running.
Please post the information provided underneath this introductory text to a paste bin service
like http://paste.kde.org instead of pasting into support threads.

==========================

Version
=======
KWin version: 5.5.5
Qt Version: 5.5.1
Qt compile version: 5.5.1
XCB compile version: 1.11.1

Operation Mode: X11 only

Build Options
=============
KWIN_BUILD_DECORATIONS: yes
KWIN_BUILD_TABBOX: yes
KWIN_BUILD_ACTIVITIES: yes
HAVE_INPUT: yes
HAVE_DRM: yes
HAVE_GBM: yes
HAVE_X11_XCB: yes
HAVE_EPOXY_GLX: yes
HAVE_WAYLAND_EGL: yes

X11
===
Vendor: The X.Org Foundation
Vendor Release: 11704000
Protocol Version/Revision: 11/0
SHAPE: yes; Version: 0x11
RANDR: yes; Version: 0x14
DAMAGE: yes; Version: 0x11
Composite: yes; Version: 0x4
RENDER: yes; Version: 0xb
XFIXES: yes; Version: 0x50
SYNC: yes; Version: 0x31
GLX: yes; Version: 0x0

Decoration
==========
Plugin: org.kde.kwin.aurorae
Theme: __aurorae__svg__my-glowglass-lite-black
Blur: 1
onAllDesktopsAvailable: true
alphaChannelSupported: false
closeOnDoubleClickOnMenu: false
decorationButtonsLeft: 0, 2
decorationButtonsRight: 6, 3, 4, 5
borderSize: 3
gridUnit: 12
font: Noto Sans,10,-1,0,50,0,0,0,0,0
smallSpacing: 3
largeSpacing: 12

Options
=======
focusPolicy: 0
nextFocusPrefersMouse: false
clickRaise: true
autoRaise: false
autoRaiseInterval: 0
delayFocusInterval: 0
shadeHover: false
shadeHoverInterval: 250
separateScreenFocus: false
placement: 4
focusPolicyIsReasonable: true
borderSnapZone: 10
windowSnapZone: 10
centerSnapZone: 0
snapOnlyWhenOverlapping: false
rollOverDesktops: true
focusStealingPreventionLevel: 1
legacyFullscreenSupport: false
operationTitlebarDblClick: 5000
operationMaxButtonLeftClick: 5000
operationMaxButtonMiddleClick: 5015
operationMaxButtonRightClick: 5014
commandActiveTitlebar1: 0
commandActiveTitlebar2: 30
commandActiveTitlebar3: 2
commandInactiveTitlebar1: 4
commandInactiveTitlebar2: 30
commandInactiveTitlebar3: 2
commandWindow1: 7
commandWindow2: 8
commandWindow3: 8
commandWindowWheel: 31
commandAll1: 10
commandAll2: 3
commandAll3: 14
keyCmdAllModKey: 16777251
showGeometryTip: false
condensedTitle: false
electricBorderMaximize: true
electricBorderTiling: true
electricBorderCornerRatio: 0.25
borderlessMaximizedWindows: false
killPingTimeout: 5000
hideUtilityWindowsForInactive: true
inactiveTabsSkipTaskbar: false
autogroupSimilarWindows: false
autogroupInForeground: true
compositingMode: 1
useCompositing: true
compositingInitialized: true
hiddenPreviews: 1
unredirectFullscreen: false
glSmoothScale: 2
colorCorrected: false
xrenderSmoothScale: false
maxFpsInterval: 16666666
refreshRate: 0
vBlankTime: 6000000
glStrictBinding: false
glStrictBindingFollowsDriver: true
glCoreProfile: false
glPreferBufferSwap: 99
glPlatformInterface: 1

Screen Edges
============
desktopSwitching: false
desktopSwitchingMovingClients: false
cursorPushBackDistance: 1x1
timeThreshold: 150
reActivateThreshold: 350
actionTopLeft: 0
actionTop: 0
actionTopRight: 0
actionRight: 0
actionBottomRight: 0
actionBottom: 0
actionBottomLeft: 0
actionLeft: 0

Screens
=======
Multi-Head: yes
Head: 0
Active screen follows mouse:  no
Number of Screens: 1

Screen 0:
---------
Name: DVI-I-0
Geometry: 0,0,1280x1024
Refresh Rate: 85.0241


Compositing
===========
Compositing is not active



My hardware is the following:
CPU: Phenom II X4 810
GPU: NVIDIA GeForce 7600 GS/PCIe/SSE2 512MB
RAM: 12GB

Code: Select all

$ glxinfo |grep -i opengl
OpenGL vendor string: NVIDIA Corporation
OpenGL renderer string: GeForce 7600 GS/PCIe/SSE2
OpenGL version string: 2.1.2 NVIDIA 304.131
OpenGL shading language version string: 1.20 NVIDIA via Cg compiler
OpenGL extensions:
OpenGL ES profile version string: OpenGL ES 2.0 NVIDIA 304.131 304.131
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 1.00
OpenGL ES profile extensions:
OpenGL vendor string: NVIDIA Corporation
OpenGL renderer string: GeForce 7600 GS/PCIe/SSE2
OpenGL version string: 2.1.2 NVIDIA 304.131
OpenGL shading language version string: 1.20 NVIDIA via Cg compiler
OpenGL extensions:
OpenGL ES profile version string: OpenGL ES 2.0 NVIDIA 304.131 304.131
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 1.00
OpenGL ES profile extensions:
$ glxinfo |grep -i version
server glx version string: 1.4
client glx version string: 1.4
GLX version: 1.4
OpenGL version string: 2.1.2 NVIDIA 304.131
OpenGL shading language version string: 1.20 NVIDIA via Cg compiler
OpenGL ES profile version string: OpenGL ES 2.0 NVIDIA 304.131 304.131
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 1.00
server glx version string: 1.4
client glx version string: 1.4
GLX version: 1.4
OpenGL version string: 2.1.2 NVIDIA 304.131
OpenGL shading language version string: 1.20 NVIDIA via Cg compiler
OpenGL ES profile version string: OpenGL ES 2.0 NVIDIA 304.131 304.131
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 1.00

Code: Select all

$ mv ~/.config/kwinrc ~/.config/kwinrc.bak

$ kwin_x11 --replace
OpenGL vendor string:                   NVIDIA Corporation
OpenGL renderer string:                 GeForce 7600 GS/PCIe/SSE2
OpenGL version string:                  2.1.2 NVIDIA 304.131
OpenGL shading language version string: 1.20 NVIDIA via Cg compiler
Driver:                                 NVIDIA
Driver version:                         304.131
GPU class:                              NV40/G70
OpenGL version:                         2.1.2
GLSL version:                           1.20
X server version:                       1.17.4
Linux kernel version:                   3.18.34
Requires strict binding:                no
GLSL shaders:                           limited
Texture NPOT support:                   yes
Virtual Machine:                        no
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(0, 1, 0, 1)
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(0, 1, 0, 1)
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(0, 1, 0, 1)
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(0, 1, 0, 1)
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(1, 0, 0, 1)
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(0, 1, 0, 1)
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(0, 0, 1, 1)
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(1, 1, 1, 1)
QXcbConnection: XCB error: 8 (BadMatch), sequence: 1557, resource id: 52428806, major code: 42 (SetInputFocus), minor code: 0
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(0.44882, 0.14882, 0.14882, 1)
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(0.50064, 0.80064, 0.50064, 1)
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(0.05054, 0.05054, 0.35054, 1)
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(1, 1, 1, 1)
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(0.3, 0, 0, 0.6)
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(0, 0.4, 0, 0.6)
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(0, 0, 0.5, 0.6)
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(0.3, 0.4, 0.5, 0.6)
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(0.134646, 0.044646, 0.044646, 0.6)
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(0.200256, 0.320256, 0.200256, 0.6)
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(0.02527, 0.02527, 0.17527, 0.6)
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(0.360172, 0.390172, 0.420172, 0.6)
kwin_core: ShaderManager self test failed
kwin_core: Failed to initialize compositing, compositing disabled
QXcbConnection: XCB error: 3 (BadWindow), sequence: 702, resource id: 1185, major code: 3 (GetWindowAttributes), minor code: 0
OpenGL vendor string:                   NVIDIA Corporation
OpenGL renderer string:                 GeForce 7600 GS/PCIe/SSE2
OpenGL version string:                  2.1.2 NVIDIA 304.131
OpenGL shading language version string: 1.20 NVIDIA via Cg compiler
Driver:                                 NVIDIA
Driver version:                         304.131
GPU class:                              NV40/G70
OpenGL version:                         2.1.2
GLSL version:                           1.20
X server version:                       1.17.4
Linux kernel version:                   3.18.34
Requires strict binding:                no
GLSL shaders:                           limited
Texture NPOT support:                   yes
Virtual Machine:                        no
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(0, 1, 0, 1)
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(0, 1, 0, 1)
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(0, 1, 0, 1)
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(0, 1, 0, 1)
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(1, 0, 0, 1)
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(0, 1, 0, 1)
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(0, 0, 1, 1)
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(1, 1, 1, 1)
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(0.44882, 0.14882, 0.14882, 1)
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(0.50064, 0.80064, 0.50064, 1)
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(0.05054, 0.05054, 0.35054, 1)
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(1, 1, 1, 1)
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(0.3, 0, 0, 0.6)
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(0, 0.4, 0, 0.6)
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(0, 0, 0.5, 0.6)
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(0.3, 0.4, 0.5, 0.6)
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(0.134646, 0.044646, 0.044646, 0.6)
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(0.200256, 0.320256, 0.200256, 0.6)
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(0.02527, 0.02527, 0.17527, 0.6)
Pixel was QVector4D(0, 0, 0, 0) expected QVector4D(0.360172, 0.390172, 0.420172, 0.6)
kwin_core: ShaderManager self test failed
kwin_core: Failed to initialize compositing, compositing disabled
QXcbConnection: XCB error: 3 (BadWindow), sequence: 1743, resource id: 1184, major code: 3 (GetWindowAttributes), minor code: 0
QXcbConnection: XCB error: 9 (BadDrawable), sequence: 1744, resource id: 1184, major code: 14 (GetGeometry), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 3152, resource id: 31457280, major code: 18 (ChangeProperty), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 3156, resource id: 31457281, major code: 18 (ChangeProperty), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 3671, resource id: 31457391, major code: 18 (ChangeProperty), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 4290, resource id: 31457280, major code: 18 (ChangeProperty), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 4294, resource id: 31457281, major code: 18 (ChangeProperty), minor code: 0
QXcbConnection: XCB error: 3 (BadWindow), sequence: 4328, resource id: 71303173, major code: 18 (ChangeProperty), minor code: 0

What does this output mean?

relevant lines

kwin_core: ShaderManager self test failed
kwin_core: Failed to initialize compositing, compositing disabled

possible bug https://bugs.kde.org/show_bug.cgi?id=360033

possible solution - upgrade driver if available

added possible solution - try nouveau drivers

if you have questions re: possible drivers available and their installation that would be more appropriately asked on your distros forum

x11-drivers/nvidia-drivers-304.131-r4 is the lastest drivers for NVIDIA GeForce 7600 GS/PCIe/SSE2 512MB. You can check it yourself by looking at the site nvidia.com and select Geforce 7 series there with Linux 64-bit. Nouveau is worse then nvidia blob and nVidia is the most suitable for Linux IIRC (Radeon/AMD has slower driver).

victorn wrote:x11-drivers/nvidia-drivers-304.131-r4 is the lastest drivers for NVIDIA GeForce 7600 GS/PCIe/SSE2 512MB. You can check it yourself by looking at the site nvidia.com and select Geforce 7 series there with Linux 64-bit. Nouveau is worse then nvidia blob and nVidia is the most suitable for Linux IIRC (Radeon/AMD has slower driver).

agree that the bug report is yours? if so confirm it, as it is marked unconfirmed and vote for it

can you upgrade your version of Kwin? maybe some newer code will help

Yes, the bug above mentioned looks very similar to my problem with compositing. I'm on stable kde-plasma/plasma-desktop-5.5.5-r1. But I can try to unmask ~5.6.4 version. But it will probably require to unmask a lot of other packages.

is a newer gpu out of the question? how bad would the igp be?

as the people responding to the bug were devs not sure what else can/will be done - again confirm the bug and see if there's a response maybe from the op

Well, I mostly don't play games except old-school ones like OpenRA or spring. This videocard runs them without any problems. I mostly office man. And compositing also worked fine without any problems in KDE4. I also heard from a guy with GeForce Go 6600 that he have no problems. Although he ran it on the same nvidia drivers and plasma 5.6.4. I made diff with his USE-flags and removed egl from make.conf. But this didn't help. I should probably try 5.6.4.
What is igp?

I will try to confirm it.

igp=integrated graphics processor, if you had a recent cpu I would think things should composite fine as the drivers would be more up to date but this is not a topic I am knowledgeable about