A ton of libpng errors when opening app

Manos Christofakis

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May 21, 2016, 5:41:54 AM5/21/16

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Hello everyone. I've been investigating the whole weird behaviour with Cintiq on a mac issue without any progress so far but when opening the application through terminal I got a ton of errors mainly about libpng (no idea). Here is the list in case anyone has any clue as to what it's about. Sorry for the long post...

libpng warning: iCCP: known incorrect sRGB profile

void QCocoaMenu::insertNative(QCocoaMenuItem *, QCocoaMenuItem *) Menu item is already in a menu, remove it from the other menu first before inserting

libpng warning: iCCP: known incorrect sRGB profile

void QCocoaMenu::insertNative(QCocoaMenuItem *, QCocoaMenuItem *) Menu item is already in a menu, remove it from the other menu first before inserting

libpng warning: iCCP: known incorrect sRGB profile

void QCocoaMenu::insertNative(QCocoaMenuItem *, QCocoaMenuItem *) Menu item is already in a menu, remove it from the other menu first before inserting

Could not parse application stylesheet

libpng warning: iCCP: known incorrect sRGB profile

libpng warning: iCCP: profile 'Photoshop ICC profile': 0h: PCS illuminant is not D50

libpng warning: iCCP: known incorrect sRGB profile

libpng warning: iCCP: profile 'Photoshop ICC profile': 0h: PCS illuminant is not D50

libpng warning: iCCP: known incorrect sRGB profile

libpng warning: iCCP: profile 'Photoshop ICC profile': 0h: PCS illuminant is not D50

libpng warning: iCCP: known incorrect sRGB profile

libpng warning: iCCP: profile 'Photoshop ICC profile': 0h: PCS illuminant is not D50

qt.network.ssl: QSslSocket: cannot resolve SSL_set_psk_client_callback

qt.network.ssl: QSslSocket: cannot resolve TLSv1_1_client_method

qt.network.ssl: QSslSocket: cannot resolve TLSv1_2_client_method

qt.network.ssl: QSslSocket: cannot resolve TLSv1_1_server_method

qt.network.ssl: QSslSocket: cannot resolve TLSv1_2_server_method

qt.network.ssl: QSslSocket: cannot resolve SSL_select_next_proto

qt.network.ssl: QSslSocket: cannot resolve SSL_CTX_set_next_proto_select_cb

qt.network.ssl: QSslSocket: cannot resolve SSL_get0_next_proto_negotiated

libpng warning: iCCP: known incorrect sRGB profile

libpng warning: iCCP: profile 'Photoshop ICC profile': 0h: PCS illuminant is not D50

QOpenGLContext::swapBuffers() called with non-exposed window, behavior is undefined

libpng warning: iCCP: profile 'Photoshop ICC profile': 0h: PCS illuminant is not D50

libpng warning: iCCP: known incorrect sRGB profile

libpng warning: iCCP: profile 'Photoshop ICC profile': 0h: PCS illuminant is not D50

libpng warning: iCCP: known incorrect sRGB profile

libpng warning: iCCP: profile 'Photoshop ICC profile': 0h: PCS illuminant is not D50

libpng warning: iCCP: known incorrect sRGB profile

libpng warning: iCCP: profile 'Photoshop ICC profile': 0h: PCS illuminant is not D50

libpng warning: iCCP: known incorrect sRGB profile

libpng warning: iCCP: profile 'Photoshop ICC profile': 0h: PCS illuminant is not D50

QOpenGLContext::swapBuffers() called with non-exposed window, behavior is undefined

GL_INVALID_FRAMEBUFFER_OPERATION: framebuffer:36053

QOpenGLContext::swapBuffers() called with non-exposed window, behavior is undefined

void QCocoaMenu::insertNative(QCocoaMenuItem *, QCocoaMenuItem *) Menu item is already in a menu, remove it from the other menu first before inserting

Tim

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May 21, 2016, 1:50:31 PM5/21/16

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I'm not claiming to be an expert, so take this with a grain of salt, but here is a breakdown of each error from my understanding:

Could not parse application stylesheet

This means there is likely a syntax error in one of the stylesheets (CSS). I'm not sure what OpenToonz uses them for, but it's just for how something displays onscreen. It likely wouldn't have any effect on how your tablet performs. Stylesheets mostly just define how to "decorate" a widget. A quick grep through the code does show a number of places where css appears to be in use, mostly involving the x-sheet, it seems.

QOpenGLContext::: PCS illuminant is not D50

libpng warning: iCCP: known incorrect sRGB profile
libpng warning: iCCP: profile

libpng warning: iCCP: profile 'Photoshop ICC profile': 0h: PCS illuminant is not D50

These are all related to color profiles. Typically it just means that the image you're working with doesn't have a good color profile, and is not really indicative of an issue with the software. The worst thing that can happen here is that an image doesn't have exactly the same colors you might expect. I don't personally have a good enough "eye" for this sort of thing to even notice the difference, but there are folks who can tell.

qt.network.ssl: QSslSocket: cannot resolve SSL_CTX_set_next_proto_select_cb
qt.network.ssl: QSslSocket: cannot resolve SSL_get0_next_proto_negotiated
qt.network.ssl: QSslSocket: cannot resolve SSL_select_next_proto

qt.network.ssl: QSslSocket: cannot resolve SSL_set_psk_client_callback
qt.network.ssl: QSslSocket: cannot resolve TLSv1_1_client_method

qt.network.ssl: QSslSocket: cannot resolve TLSv1_1_server_method
qt.network.ssl: QSslSocket: cannot resolve TLSv1_2_client_method

qt.network.ssl: QSslSocket: cannot resolve TLSv1_2_server_method

These are all networking Secure Socket Layer (SSL) and Transport Layer Security (TLS) errors. This is the same technology used when you go to a website that is HTTPS:// instead of just HTTP://. They also aren't indicative of any real problem, as it's common when negotiating a new connection for the software to have to try a number of various connection protocols/versions before finding the one that the server will accept. It's kind of like walking up to someone and saying, "Do you speak Spanish? No. Do you speak French? No. Do you speak Russian? YES!"

void QCocoaMenu::insertNative(QCocoaMenuItem *, QCocoaMenuItem *) Menu item is already in a menu, remove it from the other menu first before inserting

This just means that it tried to insert a menu item into the menu bar that already existed, so it refused to do it.

Again, I'm not claiming any level of knowledge in programming Qt5, but I do have some experience diving through logs to uncover issues, and I don't see any errors in this list that would make me believe they would have any relation to your Cintiq, and for the most part they aren't really "errors", more just informational.

Manos Christofakis

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May 23, 2016, 11:03:39 AM5/23/16

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So in general there is no serious issue here. Ok. Thank you very much for the info.

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