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Colour-shift in Qt apps since x2go 4.1 #680

Open troffasky opened 6 years ago

troffasky commented 6 years ago

Since 4.1 I have noticed strange colour shifts in Qt applications. For example, Qupzilla:

farbplatten

The "Image Viewer" window with the screenshot of Qupzilla shows the UI it as it should be but the rendered page colours wrong, and beneath that window is how Qupzilla appears without a screenshot is in progress [taken outside of the session].

Another subtle difference is that the fonts look a bit 'smeared' with a sort of coloured halo.

A workaround suggested on IRC was to add

X2GO_NXAGENT_DEFAULT_OPTIONS+=" -extension GLX"

to /etc/x2go/x2goagent.options and this seems to work.

x2go: 4.1.0.0-3 qupzilla : 2.2.5~dfsg1-1 Qt: 5.9.2+dfsg-12

uli42 commented 6 years ago

also happens on my test build of nxagent-3.5.99-10 with mesa 7.7 included

uli42 commented 6 years ago

the url of the page shown in the screenshot is https://wiki.selfhtml.org/wiki/Grafik/Farbpaletten#Farbnamen

troffasky commented 6 years ago

X2GO_NXAGENT_DEFAULT_OPTIONS+=" -extension GLX" seems not to be a fix, actually. I made the change, tested it by starting a new session as a new user and the colour shift issue was not present. I assumed that meant I had found a fix, but what I have actually found is that a fresh user account doesn't have the issue. So now it seems like the issue is actually caused by something in the user's profile, but what?

uli42 commented 6 years ago

But me and sunweaver see the colour problems, too.

troffasky notifications@github.com schrieb am Sa., 17. März 2018, 00:50:

X2GO_NXAGENT_DEFAULT_OPTIONS+=" -extension GLX" seems not to be a fix, actually. I made the change, tested it by starting a new session as a new user and the colour shift issue was not present. I assumed that meant I had found a fix, but what I have actually found is that a fresh user account doesn't have the issue. So now it seems like the issue is actually caused by something in the user's profile, but what?

— You are receiving this because you commented. Reply to this email directly, view it on GitHub https://github.com/ArcticaProject/nx-libs/issues/680#issuecomment-373874254, or mute the thread https://github.com/notifications/unsubscribe-auth/AGBw5G1ykxNEdI9LJrP84d0KJev3WkKOks5tfE_NgaJpZM4Ss5hg .

sunweaver commented 6 years ago

Nope, I couldn't reproduce them here... Neither with stretch nor buster...

Mike

On Saturday, March 17, 2018, Ulrich Sibiller wrote:

But me and sunweaver see the colour problems, too.

troffasky notifications@github.com schrieb am Sa., 17. März 2018, 00:50:

X2GO_NXAGENT_DEFAULT_OPTIONS+=" -extension GLX" seems not to be a fix, actually. I made the change, tested it by starting a new session as a new user and the colour shift issue was not present. I assumed that meant I had found a fix, but what I have actually found is that a fresh user account doesn't have the issue. So now it seems like the issue is actually caused by something in the user's profile, but what?

— You are receiving this because you commented. Reply to this email directly, view it on GitHub https://github.com/ArcticaProject/nx-libs/issues/680#issuecomment-373874254, or mute the thread https://github.com/notifications/unsubscribe-auth/AGBw5G1ykxNEdI9LJrP84d0KJev3WkKOks5tfE_NgaJpZM4Ss5hg .

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uli42 commented 5 years ago

Can anyone replicate this? I can't with 3.5.99.18