Bug 1412741

This isn't specific to Fedora. I notice the same deterioration of frame rates over time on Ubuntu as well. As the session grows longer (say, approaching a week), gnome-shell starts occupying more memory and animations grow noticeably laggy even with few windows open.

Where might one start looking to debug this?

Reporting also a similar issue on a Debian Testing running Gnome 3.26.0 (on i915 drivers). 

I also have to restart (using alf+f2 and r) Gnome, this doesn't work on Wayland so I'm staying on X.org to still be able to restart Gnome3 once in a while without rebooting the whole session. It also happens on Wayland.

I can confirm that this still happens. I'm on GNOME Shell 3.26.1, ubuntu 17.10.

$ glxinfo | grep -i render
direct rendering: Yes
    GLX_MESA_multithread_makecurrent, GLX_MESA_query_renderer, 
    GLX_MESA_multithread_makecurrent, GLX_MESA_query_renderer, 
Extended renderer info (GLX_MESA_query_renderer):
OpenGL renderer string: Mesa DRI Intel(R) Sandybridge Mobile 
    GL_ARB_conditional_render_inverted, GL_ARB_copy_buffer, GL_ARB_copy_image, 
    GL_MESA_texture_signed_rgba, GL_NV_conditional_render, GL_NV_depth_clamp, 
    GL_ARB_conditional_render_inverted, GL_ARB_copy_buffer, GL_ARB_copy_image, 
    GL_NV_conditional_render, GL_NV_depth_clamp, GL_NV_light_max_exponent, 
    GL_OES_fbo_render_mipmap, GL_OES_get_program_binary, GL_OES_mapbuffer,

Seems like it's an Intel thing. I started to use Xorg instead to see if the issue is still present. I hope not.

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