我全新安装了 Ubuntu 16.10 64 位，然后执行了 apt-get update 和 upgrade。然后安装了音频和视频编解码器。从那时起，每当需要渲染新像素时，屏幕就会闪烁。
系统主板：Intel DZ77SL-50K CPU：Intel i5-3570 3.4GZ RAM：8GB GPU：Radeon HD 7770 Sapphire Flex GHz Edition
如何修复此问题？
# lshw -c video
*-display'
description: VGA compatible controller
product: Cape Verde XT [Radeon HD 7770/8760 / R7 250X]
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 0
bus info: pci@0000:01:00.0
version: 00
width: 64 bits
clock: 33MHz
capabilities: pm pciexpress msi vga_controller bus_master cap_list rom
configuration: driver=radeon latency=0
resources: irq:29 memory:e0000000-efffffff memory:f7e00000-f7e3ffff ioport:e000(size=256) memory:c0000-dffff
# modinfo radeon
filename: /lib/modules/4.8.0-32-generic/kernel/drivers/gpu/drm/radeon/radeon.ko
license: GPL and additional rights
description: ATI Radeon
author: Gareth Hughes, Keith Whitwell, others.
depends: drm,drm_kms_helper,ttm,i2c-algo-bit
intree: Y
vermagic: 4.8.0-32-generic SMP mod_unload modversions