I'm running Ubuntu 18.04.4 LTS with Linux Kernel 5.3. My video card is the Radeon HD 2600 PRO, no proprietary drivers are installed. After resuming from suspend, my screen acts up: it becomes grainy and there is no colour. Sometimes, I'm able to see (and access) the GUI, while other times, I can see only the cursor. In both cases, the computer is, of course, nonfunctional, and I have to (force) shut it down and reboot.
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