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Questions tagged [kms]

Use this tag on questions regarding the Kernel Mode Setting (KMS).

0
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0answers
7 views

set kms specific resolution at boot time

i'm trying to set a specific resolution for kms, at boot time. by default kms choose the highest resolution available (2500x1600) which is a bit hard to read. i'd like to set 1440x900 instead. i ...
1
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0answers
55 views

HDMI monitors not correctly detected after suspend if laptop lid closed

When my Dell XPS 15 9570 laptop is on, the monitors plugged in the HDMI port are correctly detected. Unplugging a monitor also works as expected. However, when waking up from suspend by briefly ...
0
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0answers
68 views

Are video=VGA-1:e and drm.edid_firmware=VGA-1:edid.bin kernel boot options compatible?

I use an old screen (15khz CRT TV monitor) which provides no EDID (far too old). With nouveau drivers, i need to force enabling the VGA connector using video=VGA-1:e to make it works. Without that, ...
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0answers
28 views

How do I find the video memory region(s) representing what's on my screen, from within the Linux kernel?

About 5-20 times a day I am presented with brief visual glitches and heisenbugs caused by race conditions that only occur under high I/O load. These disappear off the screen far too quickly for me to ...
2
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0answers
121 views

Debugging “client 0 refused switch” with hybrid graphics

I have an old MacBook with both integrated and discrete graphics, on which I run Fedora. When I first installed it, and sometimes when I update, it fails to boot with a weird "screen crash" where ...
0
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0answers
657 views

Freezing with nvidia-drm modeset=1

Setup I have an Optimus laptop with a GTX 1050, Intel i7 7700HQ, a 128GB SSD and 8GB of RAM. Using Arch Linux and KDE Plasma. Neofetch: https://i.imgur.com/F6ksasw.png Using Nvidia proprietary ...
0
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0answers
63 views

Grub and Nvidia driver behaving differently when Dell non-UEFI (legacy) boot is enabled

The main hard disk of my Dell Precision 3620 is partitioned with a GPT and Ubuntu is installed and boots (via grub2) in UEFI mode. For months now, I have been struggling to get the Nvidia driver for ...
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1answer
1k views

Can't boot with Kernel Modesetting

I need to enable Kernel Modesetting in order for my video card to be used with the amdgpu driver, but I have this new Lenovo IdeaPad laptop that won't boot unless I boot the kernel with the nomodeset ...
2
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0answers
910 views

How to set custom EDID manually?

My monitor connects to the videocard through the DVI->VGA adapter, and EDID is not transmitted. If you use Xserver, then this problem is solved by adding previosly saved EDID in xorg.conf: Option ...
3
votes
0answers
367 views

DRM KMS and Frame buffer

I need to build a graphics driver for E4690 card with ATI Raden RV730 GPU on it. Its only beginning. I am trying to understand the relationship between the following from linux sources: DRM KMS Frame ...
3
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0answers
203 views

Any way to run multiple fullscreen EGL applications?

This came up while trying to launch Retroarch from Kodi on a Raspbian without X, both applications built to run on top of KMS/DRM with OpenGL ES2/EGL as the backend. While the first application (Kodi)...
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0answers
837 views

Setting WQHD resolution in text mode

This is an yet another question about setting higher resolution in text mode, but I've already tested some solutions posted on U&L and unfortunatelly with no effect. Let's start at the very ...
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0answers
155 views

Current display mode

Under the sysfs drm module I can obtain all available modes for a particular connector at /sys/class/drm/card0-*/modes. Is it possible or even logical to request the current state the card is in? All ...
1
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0answers
117 views

Empty output file in systemd unit file

I created the below systemd unit file (Centos 7) to run KMS server and logs the client requests to the kms-server.txt file. The service runs without any problem and responses to the client's requests ...
1
vote
0answers
2k views

Linux 4.1.6 Radeon UVD Not Responding

I've seen the same problem before version 3.19, could not remember since when, but it seems to disappear on version 3.19. But when I compile version 4.1.6 using 3.19 config, the problem came back. ...
1
vote
1answer
374 views

Increasing Kernel Mode Setting (KMS) scrollback buffer size

I'm using Kernel Mode Setting to set my server's tty resolution. I added GRUB_GFXMODE=1280x1024x24,auto to /etc/default/grub, and GRUB_GFXPAYLOAD_LINUX=keep was already there. There's no vga= or ...
2
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0answers
576 views

Disable KMS on Debian Sid

I've recently started having trouble resuming my Sid laptop from suspend. I'm not sure if this was caused by an upgrade or by me tinkering to try and get a splash screen working, but anyway, I have my ...
12
votes
2answers
3k views

Kernel modesetting hangs my boot, but the ATI driver requires it

I have a late 2011 MacBook Pro. It has an integrated Intel video card and a discrete ATI video card. Ideally, I'd like my Xorg to use the ATI card with the free driver (no Catalyst). Here's the ...
1
vote
1answer
1k views

KMS Terminal: How to disable second screen, or how to force a certaion resolution?

I have two screens with different native resolution connected to my Gentoo/systemd machine. since the VTs try to mirror the outputs, they do not use the whole size of the higher resolution screen. I ...
8
votes
2answers
31k views

What is i915.modeset=1 for?

I'm running Ubuntu 13.10 and since I upgraded to kernel 3.12.8 (build from source, including ubuntu patches) on a ivybridge video, the boot spash screen was flickering and messing up. So I googled ...
2
votes
1answer
3k views

Nouveau doesn't work after upgrade to Debian Wheezy

I upgraded from Debian squeeze to wheezy. My box contains an old graphics card not supported by current Nvidia drivers for distros newer than lenny (NV5M64 [RIVA TNT2 Model 64/Model 64 Pro]), so in my ...
2
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0answers
292 views

Is there a way to undo VGA adapter modesetting in Linux

I'm looking for a way to reset the graphics adapter to textmode after it has been set to some sort of graphical mode by the kernel on bootup, and possibly used by an X server. Is there any code to do ...
2
votes
0answers
407 views

Is it possible to set different resolution between console and X when Kernel Mode Setting is enabled?

My LCD monitor is dying. It has white screen issue: when power on, it's black screen (power LED is flashing), after a while (maybe one hour), it turns to white screen. Then I need switch to different ...
5
votes
1answer
2k views

Linux USB Boot results in black screen

I'm trying to install Linux alongside Windows 8 on my new Asus Zenbook UX32VD, which has both an Intel HD 4000 and a NVidia 620M I've been having quite a few problems booting up linux via USB so I ...
3
votes
0answers
1k views

modetest.c from libdrm tests lists no framebuffers

I wanted to play with KMS since it seems to be the preferred low-level graphics library on Linux. However, after compiling the appropriate modetest.c version (2.4.32, since that's the version of ...
4
votes
2answers
1k views

How to increase the speed of a text console (kernel mode setting)?

On a Fedora 17 system (i915 hardware) KMS works out of the box - and using the console (i.e. Ctrl+Alt+F2 etc.) is very framebuffer-like. To the point that scrolling through a man page or cat log-files ...
24
votes
2answers
7k views

Kernel Mode Setting vs. Framebuffer?

With KMS, the graphics drivers are moved into the kernel. Since the framebuffer was already in the kernel, I wouldn't expect this to affect framebuffer operation. Yet, I read that KMS supercedes the ...