Linux

48165 readers

955 users here now

From Wikipedia, the free encyclopedia

Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

Rules

Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.
No misinformation
No NSFW content
No hate speech, bigotry, etc

Related Communities

Community icon by Alpár-Etele Méder, licensed under CC BY 3.0

founded 5 years ago

MODERATORS

[email protected]

QEMU: How to increase VRAM allocation? (sh.itjust.works)

submitted 2 months ago* (last edited 1 month ago) by [email protected] to c/[email protected]

8 comments fedilink hide all child comments

I'm having trouble allocating more VRAM to my QEMU virtual machine. Currently, I'm using the following command to launch my VM:

qemu-system-x86_64 -enable-kvm -boot menu=on -drive file=QEMU -m 2G -cpu host -vga virtio

Can anyone help me figure out how to increase the VRAM allocation in QEMU?

Solution by [email protected] qemu-system-x86_64 [...] -vga qxl -global qxl-vga.vram_size_mb=128 -global qxl-vga.ram_size_mb=128

all 9 comments

sorted by: hot top controversial new old

[–] [email protected] 7 points 2 months ago (1 children)

Not sure, but maybe the QXL driver will help:

qemu-system-x86_64 [...] -vga qxl -global qxl-vga.vram_size_mb=128 -global qxl-vga.ram_size_mb=128

[–] [email protected] 3 points 2 months ago (1 children)

It's an improvement, but 500MB+ would be perfect.

[–] [email protected] 4 points 2 months ago* (last edited 2 months ago) (1 children)

Replace the value 128 to 512. And try again :)

[–] [email protected] 4 points 2 months ago

I was under the impression that QXL driver were capped at 256MB too, thanks.

[–] [email protected] 6 points 2 months ago (3 children)

Vga is fixed iirc, the original frame buffer was tiny, the emulated one gives you 16mv

Cirrus logic gives you 16mb too iirc, then you can use other drivers that give you more,

https://www.kraxel.org/blog/2019/09/display-devices-in-qemu/

[–] [email protected] 3 points 2 months ago* (last edited 2 months ago) (1 children)

If I'm reading correctly, there isn't a modern GPU driver for QEMU that supports customizing VRAM?

[–] [email protected] 4 points 2 months ago* (last edited 2 months ago)

Qxl does, it's fairly modern.

Otherwise you have virtio and virglrenderer, which are as modern as it gets this side of pcie pass through or intel's sriov.

[–] [email protected] 2 points 2 months ago* (last edited 2 months ago)

Thanks the list is very useful.