Description of problem: Ever since Fedora 22, with any version of xorg-x11-drv-intel later than 2.99.917-6 there is random flickering of the screen on my Dell Inspiron 15 with "Intel Corporation Haswell-ULT Integrated Graphics Controller (rev 0b)" (lspci). The flickering is both random and infrequent, and occurs mostly when a maximized window with a large white background is open, such as the Web browser or a text editor. I found some issues on the Web, such as bug #1226531 and bug #1226743 here, and http://lists.freedesktop.org/archives/intel-gfx/2015-May/066591.html, but these issues are either marked as fixed or seem to be different. According to various comments on such issues, I have tried both the i915.enable_ips=0 kernel boot option and the UXA acceleration method, to no avail. I have font scaling set to a factor of 1.05 although my screen resolution is 1366x768 (not native HiDPI). However, with xorg-x11-drv-intel-2.99.917-6 and earlier, font scaling did not cause any flickering. I am not using Wayland. Version-Release number of selected component (if applicable): xorg-x11-drv-intel.x86_64 2.99.917-16.20150729.fc23 How reproducible: Random Steps to Reproduce: Not deterministic, may not occur. 1. Use a version of xorg-x11-drv-intel later than 2.99.917-6 on an Intel Haswell graphics controller. 2. Open a window (on GNOME in my case, and not on Wayland), preferably one showing a large white background, and let it remain in focus for several minutes without any activity or with infrequent and minimum (localized) activity. Do not change window focus. Actual results: Screen sometimes flickers. Expected results: No flickering of the screen. Additional info: GNOME 3.18. Font scaling set to 1.05 on 1366x768 resolution. Not using Wayland.
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