On 11/6/21 20:25, Ed Greshko wrote:
On 11/06/2021 18:08, Stephen Morris wrote:
My issue with the system settings under both gnome and kde, is I am
using a 4K monitor and the system settings don't offer a 4K
resolution, even if the vm is running fullscreen, and also neither
does xrandr specify that a 4K resolution is available. The system
settings only show that a 4K resolution is accessible when I put in
the relevant modeline. The system settings also only show a
resolution of 3840x2075 which is the maximum resolution under gnome
if I run the vm windowed, or 3840x2069 which is the same maximum
resolution under KDE (I'm not sure
yet why there is this difference), if I put in modelines.
Are you running KDE and GNOME from the same VM image? Meaning you're
running KDE with gdm?
I'm running KDE and GNOME from the same vm image and using logout,
restart or cold start to switch between the two. I'm using vmware player
at the moment, but I also had the same issues when running under
virtualbox. I was using virtualbox because it supports UEFI whereas
vmware player doesn't, but I stopped using it a while ago when an
antivirus program broke the virtualbox program because it removed what
it considered to be malware.
Sometimes the below works, and sometimes it doesn't. With nVidia
drivers it fails, with nouveau it works.
It looks like it doesn't work for me with the vmware driver, I get the
following issues:
[root@localhost ~]# sudo su -
[root@localhost ~]# monitor-get-edid
mmap /dev/mem: Permission denied
I tried putting an acl on /dev/mem to give myself rwx access but that
made no difference to the above issue.
Below are the modelines that I had to add into the config over and above
what xrandr provided as the supported resolutions, coincidentally the
supported resolutions that xrandr displayed also happened to match the
resolutions that Wayland uses (I've forgotten the name of the Wayland
location I would have to look it up on the net again. As a side issue,
when I was looking for info on how to get KDE to auto-scale like Gnome
does, I found a bug report that someone raised for scaling issues in F34
and I thought they were saying that the Wayland support in KDE was not
stable, is that still the case?):
# 3840x2160 59.98 Hz (CVT 8.29M9) hsync: 134.18 kHz; pclk: 712.75 MHz
Modeline "3840x2160_60.00" 712.75 3840 4160 4576 5312 2160 2163 2168
2237 -hsync +vsync
# 3840x2075 59.99 Hz (CVT) hsync: 128.92 kHz; pclk: 682.75 MHz
Modeline "3840x2075_60.00" 682.75 3840 4152 4568 5296 2075 2078
2088 2149 -hsync +vsync
# 3840x2071 59.99 Hz (CVT) hsync: 128.68 kHz; pclk: 681.50 MHz
Modeline "3840x2071_60.00" 681.50 3840 4152 4568 5296 2071 2074 2084
2145 -hsync +vsync
# 3840x2069 59.98 Hz (CVT) hsync: 128.54 kHz; pclk: 680.75 MHz
Modeline "3840x2069_60.00" 680.75 3840 4152 4568 5296 2069 2072 2082
2143 -hsync +vsync
The 3840x2075 is the resolution that Gnome auto-scales to when I have
the vm window maximised to 4K. The 3840x2160 is the 4K resolution I need
for Xorg to scale to 4K when I am running the vm fullscreen. The
3840x2071 was the modeline I was playing around with the get KDE to
scale to the maximum window size without the horizontal and vertical
scroll bars and 3480x2069 is maximum resolution I could get KDE to scale
to without producing the scrollbars, and as I said earlier, I don't know
why KDE doesn't work without scrollbars at the 3840x2071 resolution that
Gnome works with.
regards,
Steve
Can you install monitor-edid. Then do something like I've done on
laptop.
[root@acer ~]# monitor-get-edid | monitor-parse-edid
EISA ID: CMO1552
EDID version: 1.3
EDID extension blocks: 0
Screen size: 33.1 cm x 20.7 cm (15.37 inches, aspect ratio 16/10 = 1.60)
Gamma: 2.2
Digital signal
# Monitor preferred modeline (59.9 Hz vsync, 49.3 kHz hsync,
ratio 16/10, 98 dpi)
ModeLine "1280x800" 71 1280 1328 1360 1440 800 803 809 823
-hsync -vsync
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