I installed Deepin 15.6 in my iMac (High Sierra, 21.5 inch, mid 2010, intel core i3, 6 GB ram, graphic card ATI radeon HD 4670 256MB ram)
Everything works except the graphic card, I need to boot using 'nomodeset' in the grub to avoid the use of the driver (else it stuck in black screen). I can't install the older
propietary driver, the Deepin Graphic Driver utility doesn't show any other option either, so I don't have any graphic effect.
I use Deepin since version 12.12 and never had this problem before...
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xolotl
deepin
2018-08-04 04:53
#1
I am also having issues with my upgrade to Deepin 15.6 and my AMD Graphics card (RX 480). I also have to use 'nomodeset'
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deepin 
Everything works except the graphic card, I need to boot using 'nomodeset' in the grub to avoid the use of the driver (else it stuck in black screen). I can't install the older
propietary driver, the Deepin Graphic Driver utility doesn't show any other option either, so I don't have any graphic effect.
I use Deepin since version 12.12 and never had this problem before...