On Fri, Jun 30, 2023 at 6:56 AM Robert Moskowitz <r...@htt-consult.com> wrote:
> I have a Lenovo x140e running F38. > > The video driver is normally the Radeon, but some time ago here I was > told to change the amdgpu driver but > > lspci -nnk | grep -iE "VGA|DISPLAY" -A3 > 00:01.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. > [AMD/ATI] Kabini [Radeon HD 8330] [1002:9832] > Subsystem: Lenovo Device [17aa:2219] > Kernel driver in use: amdgpu > Kernel modules: radeon, amdgpu > > But sometimes after a few suspend/unsuspend when remote and no external > VGA, this system forgets about the external monitor. > By "remote" do you mean using the laptop away from the VGA monitor or logging in from another (remote) system? If you are reconnecting the VGA after using the laptop in another location, I assume the laptop is in some "suspend" mode. When using the VGA monitor do you also use the laptop display or is the laptop closed? > > Is there someway to force the video driver to wake up and see the > attached vga monitor? > First, is your system fully updated including vendor firmware (so others will be using the same software versions)? Are you using F38 Workstation and Gnome? I have a desktop that has a monitor and a TV that is usually turned off. When first booted the login shows on the TV, so I use Settings/Displays to make the monitor the main display. The system never suspends, but logging out and back in some I sometimes have to connect the TV to get the login prompt. Have you tried Settings/Displays to detect the VGA monitor? Is the system suspended or awake when VGA is connected, and is the monitor on or off when making the connection? A workaround may be a simple change to your usual routine. Normally udev should handle events like connecting an external monitor. If you have a way to ssh into the laptop you could use "udevadm monitor" to see what happens when connecting the monitor with the laptop lid closed. Example for Xorg: < https://unix.stackexchange.com/questions/675024/udev-rule-for-connecting-external-display-not-working > -- George N. White III
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