Power problem with Radeon 7750 card and Nouveau driver
ralf.mardorf at alice-dsl.net
Wed Feb 10 08:23:45 UTC 2021
On Tue, 9 Feb 2021 16:51:51 -0500, Jeffrey Walton wrote:
>Does anyone have suggestions how to troubleshoot this further?
it's probably not a driver related issue. At least you don't care for
the correct driver. The Radeon driver is pre-installed and used for your
Radeon graphics. The nouveau driver can't handle your AMD (the graphics
brand formerly known as ATI) at all, since it's a driver for NVIDIA
A workaround probably could be to migrate from "turn monitor off after
15 minute" to "never" do so.
However, in my experiences with Ubuntu flavours that suffer from this
screen blanking issue, the screen comes back, if you push
Ctrl + Alt + F1 (or F2, F3 ... F6) and right after that
Ctrl + Alt + F7.
"nouveau (/nuːˈvoʊ/) is a free and open-source graphics device driver
for Nvidia video cards" 
"Radeon (/ˈreɪdiɒn/) is a brand of computer products, including
graphics processing units [...] by Radeon Technologies Group, a division
of Advanced Micro Devices (AMD)." 
"This guide shows you how to use the open source Radeon driver for some
ATI/AMD graphics cards and APUs, which is part of the
xserver-xorg-video-ati package. This driver provides 2D and 3D
acceleration in your video hardware. For the most recent releases of
Ubuntu (and its flavours) this driver is usually as fast as the
closed-source, proprietary fglrx driver (called AMD Catalyst) from AMD
Inc. Furthermore the Radeon driver supports some older chipsets that
fglrx does not.
The Radeon driver is already pre-installed in Ubuntu." 
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