Upgraded from 18.04 LTS with no additional drivers to 20.04 LTS
updated until 1-Oct-2020.
This bug seems to prevent correct results from e.g. mkusb
Googled for various solutions, none of which worked.
No HW changes since previous versions, back to (IIRC) 12.04
none of which showed this problem
-
Have you tried the *vga=###* where ### is one of the valid VGA values,
using this on the GRUB linux kernel line? This has worked for me on some
recent kernels/x-servers where xrandr can't force the screen resolution. I
have used this with *nouveau.noaccel=1* and sometimes *acpi=off* in problem
si
Trying to solve #874694 (only getting 640x480 maximum resolution instead
of 1024x768), I see also an Amilo L6820 with Intel 82845G/GL/GE Chipset.
This blocks my attempts to force the screen resolution at xrandr level.
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For the record, and for anyone who might be googling:
I just ran across the same problem on Debian Wheezy Netinst running on a
KVM virtual machine. The issue was that KVM's default emulated video
hardware is Cirrus, which is very old and limited in functionality. I
changed it on virt-manager to QX
I am not having the error under the present kernel 14.04 and open source
driver. I have had the error while using nvidia-current and previous
kernels and once using the nvidia open source driver and Xubuntu 13.10.
Also had the reported problem with Bodhi (based on 12.04 at the time.) I
updated t
I don't know if it is relevant here, but I got the same response from
xrandr (about gamma), and also struggled with wrong resolutions. For me,
the cause was the 'nomodeset' kernel parameter, this (i.e. disabling
kernel modesetting) caused the i915 graphics driver to fail, and the
vesa driver to be
Also affects 14.04 i686 3.13.0-24-generic #46-Ubuntu
sudo lshw -c video includes:
*-display:0 UNCLAIMED
description: VGA compatible controller
product: 4 Series Chipset Integrated Graphics Controller
vendor: Intel Corporation
xrandr: Failed to get size of gamma for outp
also affects 14.04 amd64
Intel G31/G33
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https://bugs.launchpad.net/bugs/1078695
Title:
xrandr : Failed to get size of gamma for output default
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Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: x11-utils (Ubuntu)
Status: New => Confirmed
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Title:
I tried by installing nvidia-current and the bug was fixed. Thanks for
the quick fix.
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Title:
xrandr : Failed to get size of gamma for output def
I found a fix for the 'failed to get size of gamma for output default'
which was causing the problems keeping the higher resolutions from being
used.
In using xrandr according to the https://wiki.ubuntu.com/X/Config/Resolution
guide to add higher resolutions and xrandr returns the gamma error, I
I have a 'fix' for the bug which may work, but doesn't fix the
underlying cause. If the proprietary drivers can be installed, or
simply a different video driver, this may read the gamma and allow for
re-sizing the display. I found a Live DVD (Linux Mint 14 Cinnamon)
which caused the same problem
** Tags added: xubuntu
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Title:
xrandr : Failed to get size of gamma for output default
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