Keyboard (Logitech) and trackpad (Apple) both bluetooth Software RAID: 2 x Western Digi WD4003FRYZ-01F0DB0 4TB rotational, configured as RAID 1 mirror HD: Hitachi HDE721064SLA360 rotational, 600GB On the mini display port: LG 24ML44B, built 2020 HDMI at the monitor end of the connexn Graphics card: ATI Radeon HD 4870 - 512MB, PCIe. Running OS X 10.11.6 (latest release that runs on this computer) Mac Pro 4,1, built 2009, 2x2.26 GHz Intel Zeon Occasional monitor blackouts and crashes: Mac Pro 4,1 / OS 10.11.6 / ATI Radeon HD 4870 / two monitors System summary: Could it be a known driver problem? That might be the easiest fix (for me). I have noticed that occasionally the MBP screen will throw up some random lines about 2/3 of the way up the screen before the LG goes brown. Tried MBP keyboard, wired USB keyboard and Apple Bluetooth keyboard. Set either MBP and the LG as primary screen. Tried connecting LG with either Thunderbolt 3 or USB C cables. LG said they did not have this issue logged.Ħ. Reinstalled OS 10.15.2 in recovery modeĥ. Any ideas on why this happens and how to fix it? But before you offer suggestions, these are a few of the things that I have done.ġ. The AMD Radeon Pro 5500M graphics card has 8GB of memory. Such as changing resolution via display preferences or hitting escape from login and try again. A refresh of the display returns it to normal view. (My MBP screen is does not change.) I can use the LG screen but it looks horrible. Why does my external 23.7in LG 24MD4KL display go brownish on my MacBook Pro 16in when waking? Quite often, but not always, when my MBP wakes from sleep or leaves the screen saver, the LG screen is brownish and the resolution seems smoothed.
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