Ask Ubuntu
Ask Ubuntu

Questions tagged [kms]

19 questions
5
votes
1 answer

Ubuntu on the Sony Vaio VPCY 21S1E

My girlfriend got a new Subnotebook for Christmas (Sony Vayo VPCY21S1E), which comes with an "Intel HD graphics" vga adaptor. When I try to boot the Ubuntu installer from USB, the screen goes blank after a short while, before I even see the Ubuntu…
Emma Heinle
  • 2,217
2
votes
4 answers

Screen flickering with Ubuntu 15 on MSI PE 60 2QE

My new MSI PE60 2QE laptop mounts an Intel Integrated Graphics Chipset 5600 connected to a Samsung 156HL01-102 display. The display works perfectly when I boot with the "nomodeset" parameter in the kernel command line -- but using the framebuffer…
jsalvata
  • 46
2
votes
2 answers

I need to add sections in xorg.conf, do I need to create it?

I understand that 10.10 / KMS does not use xorg.conf; however, I need to add the following to my xorg.conf in a Device section: Option "Capabilities" "0x00000800" Option "UseFastTLS" "off" Option "KernelModuleParm" "locked-userpages=0" However,…
Kalman
  • 21
2
votes
1 answer

How do I set the refresh rate used by KMS on the FOSS ati driver?

With KMS enabled on Xubuntu 11.04, my virtual terminals are running at 60hz, the default for my monitor, while my X desktop is running at 75, the refresh rate I specified in my xorg.conf. How do I set the refresh rate/mode used by KMS so that it is…
raevol
  • 33
2
votes
1 answer

What does -1 mean for modeset? What are other options for modeset?

I have a rough idea what KMS setting is: Kernel mode-setting (KMS) shifts responsibility for selecting and setting up the graphics mode from X.org to the kernel. When X.org is started, it then detects and uses the mode without any further mode…
fpghost
  • 1,659
  • 4
  • 24
  • 35
2
votes
0 answers

How to switch graphics driver in Ubuntu 18.04 Radeon HD 4670 (iMac 11,2)

I successfully installed Bionic Beaver, working around the KMS problem with "nomodeset" appended to the GRUB2 options when installing. However, or perhaps as a consequence, Ubuntu installed the graphics system as this, without 3D…
Molemi
  • 21
1
vote
1 answer

Using a saved EDID so Ubuntu boots to correct resolution when TV is turned off

I have an Intel NUC6i7KYK (Intel Graphics 580) and Ubuntu 16.04. I'm trying to get around the problem of Ubuntu booting to a different resolution if it boots while the TV is turned off. I know there is a hardware solution involving something like Dr…
oviano
  • 11
1
vote
0 answers

i915 frame buffer console cannot be set to 800x600? (Lubuntu 14.04)

I have an Intel Atom (N525, Cedarview) based mainboard which I'm trying to use with Ubuntu (Lubuntu, to be exact, but the problem should exist in the normal version as well). I use the kernel drm and fbcon modules together with the i915 kernel…
Hes
  • 11
1
vote
0 answers

Xorg doesn't detect graphic card in pure EFI boot

I'm trying to speed up the boot process in my iMac as much as possible. With Ubuntu 14.10 and kernel 3.16 I succeeded in booting the system by creating a small HFS+ partition, to be used as the system efi's one, copying the kernel and the initrd…
Caraffande
  • 21
  • 3
1
vote
2 answers

How to run kvm/qemu on a virtual terminal with kms enabled

I deduce from the kvm howtos that this should actually work with sdl and a framebuffer, but I can't get it going. Doing kvm -cdrom tinycore-current.iso with normal user account on a virtual terminal gives: kvm: pci_add_option_rom: failed to find…
aquaherd
  • 6,345
1
vote
1 answer

Can turning off drm_kms_helper polling affect screen brightness control?

I have a Samsung R430 notebook that has been running Ubuntu for close to a year, now. Since I've upgrated to Maverick, I've been dealing with little, but increasingly annoying issues, that put my faith to question. The first one, a CPU-intensive set…
dodecaphonic
  • 111
1
vote
0 answers

Ubuntu 21.10 Pi KMS overscan setting Issue

I am running Ubuntu on a Raspberry Pi 4B and have run into an issue with the KMS driver and overscan. When running dtoverlay=vc4-fkms-v3d the overscan settings apply correctly to keep the display from escaping the screen boundries. However, when I…
Michael Gilliam
  • 11
0
votes
1 answer

Video blank on boot

Booting Ubuntu 14.10 on tablet with Intel Z3740 CPU, but when booting without nomodeset parameter, video blinks and goes black (backlight seems to be still on) after this message: fb: switching to inteldrmfb from EFI VGA Is there any way to debug…
joshas
  • 675
0
votes
0 answers

How can I enumerate the available KMS modes using open syscall?

I’m trying to install some vGPU platform and I found the resolution is somehow locked, xrandr didn’t work, it returns “ Failed to get size of gamma”. So I’m thinking maybe I can enumerate the available KMS modes if I can read from the KMS file…
Momoko
  • 1
0
votes
0 answers

Unable to boot Ubuntu 20.04 on iMac 12,2 (i7, Mid-2011) without kernel option `nomodeset`

I am struggling with an iMac 27" from 2011 with a Radeon 6970M GPU. Without the nomodeset kernel parameter the display turns black when KMS kicks in. With i915.modeset=1 radeon.modeset=0 the boot continues but the screen turns again black with a…
ste
  • 1
1
2