Brunch on Intel Core 7 Ultra laptop

[krishnarao-1]

Hi, I have lenovo thinkbook with Intel Core 7 Ultra and I tried to install chrome os as image for dual boot first using the voxel image and later using a screebo image. No luck and all I get is a black screen with no messages/nothing. I have waited nearly an hour and saw no progress. Many thanks, Krishna

[SLEDTU]

Same here; MSI Prestige Evo 13 A1 - U7-155h, tried Brunch & Flex.

[cemalgulluoglu]

I am having the same issue. I have a dualboot installation. Neither Brunch nor Brunch Settings works. I have a HUAWEI MateBook 14 (2024) with Intel Core Ultra 7 155H processor, 16 GB memory and 1 TB disk. Tried with volteer, rammus, hatch, brya and rex images but no luck. In case I missed something with the configurations or Grub, I installed Linux Mint to another partition and am able to boot properly via the same Grub instance.

Addiitonal information:

• Secure boot disabled
• Fast startup is disabled
• Hibernation is disabled
• The brunch partition is unencrypted, no Bitlocker
• Tried with a) 200 GB partition and 198 GB image size, and b) 66 GB partition size and 60 GB image size
• Tried all botth with and without the -l (legacy EFI bootloader ) parameter as suggested in the troubleshooting-and-faqs.md

[Schefflin]

What kind the REimg should be chosen for ultra series1?

[krishnarao-1]

So far, nothing has worked for me Tried volteer, rammus, rex, brya, nissa

[numbqq]

I have the same issues on Intel Core Ultra cpu, how to fix this?

[Schefflin]

@cemalgulluoglu Did you have done it?

[cemalgulluoglu]

@cemalgulluoglu Did you have done it?

I have been trying with every stable release and as of version version r131 stable 20241226, it still doesn't work. Referencing this site: https://www.chromium.org/chromium-os/developer-library/reference/development/developer-information-for-chrome-os-devices/ I'm trying with Rex image as Ultra Core 155h platform is Meteor Lake. I'm open to test any image if it helps.

[Snape3058]

@cemalgulluoglu I think the rex image should work, as it is the image of ASUS ExpertBook CX54 Chromebook Plus Enterprise (CX5403), which has an Intel Core Ultra 7 155h CPU originally. However, the latest release of brunch does not support writing it to a USB drive as the image contains 14 partitions rather than 12. Do you know how to do it manually? thx

[stevierayg]

@Snape3058 I don't see 14 partitions in the rex recovery image, please explain. The shell script that loops to write the modified brunch image is in chromeos-install.sh, which you could modify on your machine before running it.

Here is where I see 12 partitions in the rex recovery image: $ fdisk -l chromeos_16181.61.0_rex_recovery_stable-channel_RexMPKeys-v5.bin Disk chromeos_16181.61.0_rex_recovery_stable-channel_RexMPKeys-v5.bin: 4.3 GiB, 4621046272 bytes, 9025481 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: gpt Disk identifier: E925551B-376C-054B-B3C7-37D7CE1A0482

Device Start End Sectors Size Type chromeos_16181.61.0_rex_recovery_stable-channel_RexMPKeys-v5.bin1 8495104 8763288 268185 130.9M Linux filesystem chromeos_16181.61.0_rex_recovery_stable-channel_RexMPKeys-v5.bin2 405504 1454079 1048576 512M ChromeOS kernel chromeos_16181.61.0_rex_recovery_stable-channel_RexMPKeys-v5.bin3 1454080 8417279 6963200 3.3G ChromeOS root fs chromeos_16181.61.0_rex_recovery_stable-channel_RexMPKeys-v5.bin4 8417280 8482815 65536 32M ChromeOS kernel chromeos_16181.61.0_rex_recovery_stable-channel_RexMPKeys-v5.bin5 8482816 8486911 4096 2M ChromeOS root fs chromeos_16181.61.0_rex_recovery_stable-channel_RexMPKeys-v5.bin6 262208 262208 1 512B ChromeOS kernel chromeos_16181.61.0_rex_recovery_stable-channel_RexMPKeys-v5.bin7 262209 262209 1 512B ChromeOS root fs chromeos_16181.61.0_rex_recovery_stable-channel_RexMPKeys-v5.bin8 266240 274431 8192 4M Linux filesystem chromeos_16181.61.0_rex_recovery_stable-channel_RexMPKeys-v5.bin9 64 262207 262144 128M unknown chromeos_16181.61.0_rex_recovery_stable-channel_RexMPKeys-v5.bin10 8763289 9025432 262144 128M unknown chromeos_16181.61.0_rex_recovery_stable-channel_RexMPKeys-v5.bin11 8486912 8495103 8192 4M Linux filesystem chromeos_16181.61.0_rex_recovery_stable-channel_RexMPKeys-v5.bin12 274432 405503 131072 64M EFI System

Partition table entries are not in disk order.

[Snape3058]

@stevierayg The recovery image I downloaded is newer than yours, 16209.50.0, whose output of fdisk -l is presented below. I found this problem because the brunch script (stable_20250421) complains that "input.bin is not a valid ChromeOS recovey image", which fails the condition check [ $(cgpt show -i 13 -b "$source") -gt 0 ]. With a further check on my recovery image, I found that the size of the 13th partition is not zero because it contains 14 partitions.

In addition, I also tried to use balena-etcher to write the recovery image directly to my u-disk, but it also fails to boot.

Disk chromeos_16209.50.0_rex_recovery_stable-channel_RexMPKeys-v5.bin: 4.3 GiB, 4621054464 bytes, 9025497 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 231D4BFE-E1AB-D546-9619-BBAD53C7FF42

Device                                                               Start     End Sectors  Size Type
chromeos_16209.50.0_rex_recovery_stable-channel_RexMPKeys-v5.bin1  8495104 8763304  268201  131M Linux filesystem
chromeos_16209.50.0_rex_recovery_stable-channel_RexMPKeys-v5.bin2   405504 1454079 1048576  512M ChromeOS kernel
chromeos_16209.50.0_rex_recovery_stable-channel_RexMPKeys-v5.bin3  1454080 8417279 6963200  3.3G ChromeOS root fs
chromeos_16209.50.0_rex_recovery_stable-channel_RexMPKeys-v5.bin4  8417280 8482815   65536   32M ChromeOS kernel
chromeos_16209.50.0_rex_recovery_stable-channel_RexMPKeys-v5.bin5  8482816 8486911    4096    2M ChromeOS root fs
chromeos_16209.50.0_rex_recovery_stable-channel_RexMPKeys-v5.bin6   262208  262208       1  512B ChromeOS kernel
chromeos_16209.50.0_rex_recovery_stable-channel_RexMPKeys-v5.bin7   262209  262209       1  512B ChromeOS root fs
chromeos_16209.50.0_rex_recovery_stable-channel_RexMPKeys-v5.bin8   266240  274431    8192    4M Linux filesystem
chromeos_16209.50.0_rex_recovery_stable-channel_RexMPKeys-v5.bin9       64  262207  262144  128M unknown
chromeos_16209.50.0_rex_recovery_stable-channel_RexMPKeys-v5.bin10 8763305 9025448  262144  128M unknown
chromeos_16209.50.0_rex_recovery_stable-channel_RexMPKeys-v5.bin11 8486912 8495103    8192    4M Linux filesystem
chromeos_16209.50.0_rex_recovery_stable-channel_RexMPKeys-v5.bin12  274432  405503  131072   64M EFI System
chromeos_16209.50.0_rex_recovery_stable-channel_RexMPKeys-v5.bin13  262210  262210       1  512B unknown
chromeos_16209.50.0_rex_recovery_stable-channel_RexMPKeys-v5.bin14  262211  262211       1  512B unknown

Partition table entries are not in disk order.

[Ken611116]

INTEL: 3th (Ivy Bridge): "samus" , "reef" 4th (Haswell): "rammus" 5th (Broadwell): "rammus" 6th (Skylake): "rammus" , "shyvana" 7th (Kaby Lake): "shyvana" , "rammus" 8th (Coffee Lake): shyvana" for Intel , "bobba" for Celeron. 9th (Coffee Lake): "shyvana" for Intel , "bobba" for Celeron. 10th (Comet Lake): "jinlon". 11th (Tiger Lake): "voxel". 12th (Alder Lake): "brya" , "brask" 12th (Alder Lake-N) "craaskvin" , "craaskana" , "craasneto" ---->N100 N200 N305 12th (Twin Lake) "rynax" , "riven" , "rudriks" , "teliks" ----N150 , N250 N350 .... 13th (Raptor Lake): "brask". 14th (Raptor Lake): "brask".

Core Ultra 1 (Meteor Lake): "karis" , "screebo" ----100U Core Ultra 2 (Lunar Lake): "karis" , "screebo" ----200V Core Ultra 2 (Arrow Lake): "karis" , "screebo" ----200K , 200H , 200U

[rickythebeast]

any luck on this issue?

[cemalgulluoglu]

any luck on this issue?

I just tried Brunch r137 with rex and voxel images but still can't boot. I've been also trying FydeOS and ChromeOS Flex and they don't boot as well.

[cc-kyoto]

Also blank screen here after selecting entry in Grub here on Meteor Lake Intel Core Ultra 5 134U (Dell Latitude 7350 Detachable) Have tried the latest recovery (137) of voxel and rex with current (Brunch r137 stable 20250616)

Noted the similar issues raised for Meteor Lake on ChromeOS Flex and Fyde.

Guessing it is due to the updated onboard ARC graphics? Linux (Ubuntu) runs great though - rex seems to be the only official one for Meteor Lake based chromebooks available at the moment, maybe we get more luck when newer Lunar Lake ones become available

Update 08/Sep/25: Some reports of success booting FydeOS on Ultra Core 7 detailed report here and verified here by swapping the bootloader (GRUB) out for systemd-boot. I'm a bit novice to attempt a test, perhaps somebody more familiar can try this on brunch?

[SLEDTU]

Just booted in, and installed ChromeOS flex fine - runs ok, wakes from suspend.

Touchpad works under developer, but wifi doesn't work after suspend, camera does work but no audio. Laptop is a MSI Prestige 13 AI (155h).....Octane 2 92,319 score.....not too shabby !

[cc-kyoto]

@SLEDTU care to elaborate did you "just booted in" with no modifications to default installers? Brunch or Chrome OS Flex?

[SLEDTU]

Default ChromeOS Flex - picked up a USB that I thought had Ubuntu on it, but turns out it was a Flex USB I'd made a few days ago and got a nice surprise.

Boots and apart from my touchpad requiring dev stream on Flex to work, it performed fine. No audio and the usual issue (with linux) of the wifi not working after suspend.

I haven't had a chance to try Brunch yet, but will tonight - just thought I'd post to give some hope here as I've been waiting months to run ChromeOS on this little laptop.

** UPDATE ** - Disabling D3Cold in bios (MSI advanced) has resolved the wifi issue after suspend. Just the audio left

[Snape3058]

@SLEDTU I tried the ChromeOS Flex Installer Image (https://dl.google.com/chromeos-flex/images/latest.bin.zip) from the ChromeOS Flex Help (https://support.google.com/chromeosflex/answer/11541904), but the image file written to a USB disk does not boot on my machine. Are you still able to find out precisely which version you are using? Thx. I am using the HP EliteBook 840 with the Intel Core Ultra 7 165U (14) CPU.

[SLEDTU]

Sorry for the delay - here is a screenshot of version and specs.

I just used the Chromebook Recovery Utility and selected Google/ChromeOS Flex and booted in. Everything seems to work except audio for me, but BT audio works. Trackpad requires Dev channel.

Here's my laptop for reference; |https://au.msi.com/Business-Productivity/Prestige-13-AI-Evo-A1MX

[TestMyLox]

Dos anyone have an idea how to install ChormeOS+Bruch or ChromeOSFlex on a DELL Pro 16 Plus (PB16250) with a DELL Core ultra 235U? I turned off secure boot already but I´m stuck on the Brunch Start Screen where you can select "ChromeOS / ChromeOS (settings).

With ChromeOS Flex I´m stuck on the DELL Bootscreen....

[SLEDTU]

One more update on the 155h in my MSI; Dev channel update today (Version 143.0.7499.11 (Official Build) dev (64-bit)) and audio works also in ChromeOS Flex

[BasGame1]

Hi, im trying to boot brunch on a core ultra 255 h. I have tried rex, ramus, volteer and Bryan, none of them worked, I for a black screen always and sometimes a message about EFI stub, can anybody help me?

[cc-kyoto]

Hi, im trying to boot brunch on a core ultra 255 h. I have tried rex, ramus, volteer and Bryan, none of them worked, I for a black screen always and sometimes a message about EFI stub, can anybody help me?

as reported above, no current support - Chrome OS Flex works for me (Core Ultra 5 134U) downloading the latest image via the browser extension.

If you need Play Store apps Waydroid via Linux is an OK option...