# HiFive Unmatched **URL:** https://forums.sifive.com/c/hifive-unmatched/16.md?page=1 [Latest](https://forums.sifive.com/latest.md) · [Categories](https://forums.sifive.com/categories.md) **Page:** 2 --- ## [\[Sifive E21\] Unregister existing vector handler and register a new one](https://forums.sifive.com/t/sifive-e21-unregister-existing-vector-handler-and-register-a-new-one/6488)
**Author:** [@Kurra](https://forums.sifive.com/u/Kurra)\ **Replies:** 1\ **Last updated:** [October 26, 2024, 4:13am UTC](https://forums.sifive.com/t/sifive-e21-unregister-existing-vector-handler-and-register-a-new-one/6488 "2024-10-26T04:13:30Z")
Hi, I’m using Sifive E21 single hart processor. I’m registering an ISR for I3C in the bootloader. After jumping to the actual firmware, I want to use a different handler for this. So, I want to un-register existing one … --- ## [Question about the port for Zephyr](https://forums.sifive.com/t/question-about-the-port-for-zephyr/6493)
**Author:** [@kwangbaeklee](https://forums.sifive.com/u/kwangbaeklee)\ **Replies:** 1\ **Last updated:** [June 1, 2024, 5:27pm UTC](https://forums.sifive.com/t/question-about-the-port-for-zephyr/6493 "2024-06-01T17:27:09Z")
Hi Folks, I have a question while thinking about buying this board to test my ethernet device driver and some application. Does HiFive Unmatched board has a port for Zephyr RTOS? I’m trying to simulate it on Renode bu… --- ## [Boots from ssd kernel does not mount ssd root](https://forums.sifive.com/t/boots-from-ssd-kernel-does-not-mount-ssd-root/6439)
**Author:** [@ct.clmsn](https://forums.sifive.com/u/ct.clmsn)\ **Replies:** 4\ **Last updated:** [April 3, 2024, 3:10pm UTC](https://forums.sifive.com/t/boots-from-ssd-kernel-does-not-mount-ssd-root/6439 "2024-04-03T15:10:12Z")
Background: I’ve an Unmatched Rev B board running ubuntu off SSD. Issue: Last Friday the Unmatched Rev B board started up and everything was great. Today, I started the machine and found that it was mounting microSD i… --- ## [How to download Evaluation RTL from Core Designer](https://forums.sifive.com/t/how-to-download-evaluation-rtl-from-core-designer/6431)
**Author:** [@gwym](https://forums.sifive.com/u/gwym)\ **Replies:** 3\ **Last updated:** [September 24, 2024, 8:43pm UTC](https://forums.sifive.com/t/how-to-download-evaluation-rtl-from-core-designer/6431 "2024-09-24T20:43:08Z")
Hi, I want to download evaluation RTL for U74 but i cannot find download link in the Core Designer.There is only a release file on it. If i should get the permission from Sifive? if so , how can i get it? Thanks. --- ## [Board doesn‘t work](https://forums.sifive.com/t/board-doesn-t-work/6536)
**Author:** [@yanfae](https://forums.sifive.com/u/yanfae)\ **Replies:** 2\ **Last updated:** [August 9, 2024, 1:40am UTC](https://forums.sifive.com/t/board-doesn-t-work/6536 "2024-08-09T01:40:19Z")
connect 350W ATX power， after power on ， the CPU fan flash 1s then shutdown, press power on key, no any response, there only one D23 led on, no infomation output on serial , i want to confirm if this board is bad, need r… --- ## [X280 Evaluation FPGA HDL and Bistream](https://forums.sifive.com/t/x280-evaluation-fpga-hdl-and-bistream/6526)
**Author:** [@FPGA\_Zealot](https://forums.sifive.com/u/FPGA_Zealot)\ **Replies:** 1\ **Last updated:** [July 14, 2024, 8:52pm UTC](https://forums.sifive.com/t/x280-evaluation-fpga-hdl-and-bistream/6526 "2024-07-14T20:52:19Z")
What is the best way to ask for the X280 evaluation source and bitstream files? The Sales team told me to ask here. --- ## [Powersupplied died and took board with it](https://forums.sifive.com/t/powersupplied-died-and-took-board-with-it/6461)
**Author:** [@Mariuspersen](https://forums.sifive.com/u/Mariuspersen)\ **Replies:** 4\ **Last updated:** [July 10, 2024, 8:42am UTC](https://forums.sifive.com/t/powersupplied-died-and-took-board-with-it/6461 "2024-07-10T08:42:16Z")
Hello everyone, Had a bit of unfortunate accident where my powersupply died and took the board with it. The good news is that I think the damage have been localized to the U36A IC and hoping to get a replacement. The … --- ## [Graphic Card Does not Work](https://forums.sifive.com/t/graphic-card-does-not-work/6507)
**Author:** [@bigbamboo9](https://forums.sifive.com/u/bigbamboo9)\ **Replies:** 3\ **Last updated:** [June 25, 2024, 2:48pm UTC](https://forums.sifive.com/t/graphic-card-does-not-work/6507 "2024-06-25T14:48:38Z")
I use a SWFT 210 Radeon RX 6600 CORE Gaming Graphics Card for HiFive Unmatched Rev B board. However, nothing is outputted. I looked at the log and found it was not initialized correctly. The related logs are attached as … --- ## [Unmatched Rev B LED D2 not on](https://forums.sifive.com/t/unmatched-rev-b-led-d2-not-on/6465)
**Author:** [@dsw](https://forums.sifive.com/u/dsw)\ **Replies:** 2\ **Last updated:** [April 29, 2024, 6:27am UTC](https://forums.sifive.com/t/unmatched-rev-b-led-d2-not-on/6465 "2024-04-29T06:27:52Z")
I installed an Ubuntu server image (22.04.4 server install image) on the SD card shipped with the board, switched the booting mode SEL to “1011”. However, the OS can not boot, and the LED D2 keeps off. Is the hardware b… --- ## [Coreboot/Oreboot support](https://forums.sifive.com/t/coreboot-oreboot-support/5321)
**Author:** [@apache8080](https://forums.sifive.com/u/apache8080)\ **Replies:** 1\ **Last updated:** [April 2, 2024, 5:36pm UTC](https://forums.sifive.com/t/coreboot-oreboot-support/5321 "2024-04-02T17:36:05Z")
Is there coreboot/oreboot support for the HiFive Unmatched? There used to be a little support for the Unleashed. If not is there any group working on adding support for it? --- ## [Unmatched First Runs](https://forums.sifive.com/t/unmatched-first-runs/4750)
**Author:** [@SkonsFr](https://forums.sifive.com/u/SkonsFr)\ **Replies:** 19\ **Last updated:** [March 18, 2024, 9:25pm UTC](https://forums.sifive.com/t/unmatched-first-runs/4750 "2024-03-18T21:25:14Z")
hello, first comments after running my freshly received HiFiveUnmatched board with the provided Freedom USDK 2021.03.01 sdcard --- ## [CRC error on boot from nvme w/ubuntu?](https://forums.sifive.com/t/crc-error-on-boot-from-nvme-w-ubuntu/6403)
**Author:** [@ct.clmsn](https://forums.sifive.com/u/ct.clmsn)\ **Replies:** 2\ **Last updated:** [March 18, 2024, 9:18pm UTC](https://forums.sifive.com/t/crc-error-on-boot-from-nvme-w-ubuntu/6403 "2024-03-18T21:18:11Z")
Managed to get nvme boot working; thank you to everyone for the assistance. I had a question about CRC issues with SPIFlash. Is this caused by UEFI hitting nvme, failing, then falling back on the onboard SPI? U-Boot SPL… --- ## [2023 Unmatched Rev B boot from NVME](https://forums.sifive.com/t/2023-unmatched-rev-b-boot-from-nvme/6373)
**Author:** [@ct.clmsn](https://forums.sifive.com/u/ct.clmsn)\ **Replies:** 15\ **Last updated:** [February 12, 2024, 10:23pm UTC](https://forums.sifive.com/t/2023-unmatched-rev-b-boot-from-nvme/6373 "2024-02-12T22:23:06Z")
Recently purchased an Unmatched Rev B (2023) and have been trying to get ubuntu installed on the system. I downloaded the image from the ubuntu-based link. Will the address post below in the reply section. Specifically… --- ## [NVME not functioning](https://forums.sifive.com/t/nvme-not-functioning/4762)
**Author:** [@jamescorbett](https://forums.sifive.com/u/jamescorbett)\ **Replies:** 11\ **Last updated:** [February 8, 2024, 2:53pm UTC](https://forums.sifive.com/t/nvme-not-functioning/4762 "2024-02-08T14:53:59Z")
Hey, With the nvme (Samsung 970 EVO Plus 1 TB) inserted I’m getting this: Model: SiFive HiFive Unmatched A00 Net: eth0: ethernet@10090000 Hit any key to stop autoboot: 0 PCIe Link up, Gen1 Device 0: Vendor: 0xUnha… --- ## [Translating my C# code into assembly language suitable for RISC-V architecture](https://forums.sifive.com/t/translating-my-c-code-into-assembly-language-suitable-for-risc-v-architecture/6360)
**Author:** [@qawsedrftgyhuj159874](https://forums.sifive.com/u/qawsedrftgyhuj159874)\ **Replies:** 6\ **Last updated:** [January 25, 2024, 9:40am UTC](https://forums.sifive.com/t/translating-my-c-code-into-assembly-language-suitable-for-risc-v-architecture/6360 "2024-01-25T09:40:28Z")
I need to translate my C# code into assembly language suitable for RISC-V architecture. My c# code is below. using System; class Program { static void Main() { int a = 45; int b = 7; int c = 26; int d = 34; … --- ## [Hifive unmatched revb](https://forums.sifive.com/t/hifive-unmatched-revb/6338)
**Author:** [@Olorin](https://forums.sifive.com/u/Olorin)\ **Replies:** 6\ **Last updated:** [December 23, 2023, 3:43pm UTC](https://forums.sifive.com/t/hifive-unmatched-revb/6338 "2023-12-23T15:43:04Z")
Has anyone here tried the revB? Are there any actual differences or improvements vs. the original? --- ## [Chassis Fans When Booting From Flash](https://forums.sifive.com/t/chassis-fans-when-booting-from-flash/6353)
**Author:** [@joe](https://forums.sifive.com/u/joe)\ **Replies:** 0\ **Last updated:** [December 16, 2023, 4:53pm UTC](https://forums.sifive.com/t/chassis-fans-when-booting-from-flash/6353 "2023-12-16T16:53:27Z")
Hi all. I have a HiFive Unmatched with a 1TB NVMe drive. Months ago I sorted out how to install the OS on it and boot from flash. Unfortunately when booting like this the chassis fans aren’t running. When taking an S… --- ## [Debian on HiFive Unmatched](https://forums.sifive.com/t/debian-on-hifive-unmatched/6339)
**Author:** [@Knorkfox](https://forums.sifive.com/u/Knorkfox)\ **Replies:** 2\ **Last updated:** [November 29, 2023, 7:58pm UTC](https://forums.sifive.com/t/debian-on-hifive-unmatched/6339 "2023-11-29T19:58:56Z")
It is still new, and not all things work. Progress is made. --- ## [Possible to shut off one core? tainted core](https://forums.sifive.com/t/possible-to-shut-off-one-core-tainted-core/6326)
**Author:** [@Knorkfox](https://forums.sifive.com/u/Knorkfox)\ **Replies:** 5\ **Last updated:** [November 9, 2023, 2:00pm UTC](https://forums.sifive.com/t/possible-to-shut-off-one-core-tainted-core/6326 "2023-11-09T14:00:24Z")
Hi there, i would like to know if it is possible to stop a single core or hart if it is faulty. I suppose, a server has many cores to run the software. In the future, a server cpu can have 64 cores or 80 cores. If a c… --- ## [Incorrect Login-Credentials](https://forums.sifive.com/t/incorrect-login-credentials/6304)
**Author:** [@startbit96](https://forums.sifive.com/u/startbit96)\ **Replies:** 2\ **Last updated:** [October 20, 2023, 9:10pm UTC](https://forums.sifive.com/t/incorrect-login-credentials/6304 "2023-10-20T21:10:01Z")
Hello, while trying to set up the HiFive Unmatched I installed the demo-coreip-cli-unmatched.rootfs.wic.xz of the current release (2023.08.00). When connecting to the board using the UART connection, I receive all the … --- ## [Remote GDB of Linux app](https://forums.sifive.com/t/remote-gdb-of-linux-app/6273)
**Author:** [@michael67](https://forums.sifive.com/u/michael67)\ **Replies:** 6\ **Last updated:** [September 29, 2023, 4:26pm UTC](https://forums.sifive.com/t/remote-gdb-of-linux-app/6273 "2023-09-29T16:26:56Z")
I’ve got a U54, five core based design. I’m running Yocto based off of SiFive’s “Unleashed” from GitHub - sifive/freedom-u-sdk: Freedom U Software Development Kit (FUSDK), 2023.04 branch. I’m following the direction fr… --- ## [Pci express slot x16 does not work for x1 card](https://forums.sifive.com/t/pci-express-slot-x16-does-not-work-for-x1-card/6284)
**Author:** [@shawnx](https://forums.sifive.com/u/shawnx)\ **Replies:** 3\ **Last updated:** [September 14, 2023, 4:35pm UTC](https://forums.sifive.com/t/pci-express-slot-x16-does-not-work-for-x1-card/6284 "2023-09-14T16:35:42Z")
I tried two pci express x1 card in the x16 slot, neither was even detected the kernel, lspci showed nothing of course, it’s like two of them are not even power on. however both x1 cards work in desktop’s pci express x16… --- ## [Minecraft Running (Barely)](https://forums.sifive.com/t/minecraft-running-barely/4974)
**Author:** [@cavemanol](https://forums.sifive.com/u/cavemanol)\ **Replies:** 7\ **Last updated:** [September 14, 2023, 4:04am UTC](https://forums.sifive.com/t/minecraft-running-barely/4974 "2023-09-14T04:04:22Z")
I have managed to get Minecraft running on my Unmatched (Ubuntu), although running is a probably not the best word for this. It took about 20 minutes to get to the main menu, took about an hour to generate and load a new… --- ## [Unmatched for sale](https://forums.sifive.com/t/unmatched-for-sale/5985)
**Author:** [@shawnx](https://forums.sifive.com/u/shawnx)\ **Replies:** 13\ **Last updated:** [September 6, 2023, 5:29pm UTC](https://forums.sifive.com/t/unmatched-for-sale/5985 "2023-09-06T17:29:36Z")
One board with original box, used twice(to run ubuntu 20.04) then our project changed directions so it is no longer needed. Paid $665 for it. Ship from Texas,USA. Reply here if interested. --- ## [3D MMO engine](https://forums.sifive.com/t/3d-mmo-engine/6276)
**Author:** [@rupy](https://forums.sifive.com/u/rupy)\ **Replies:** 1\ **Last updated:** [September 2, 2023, 1:44pm UTC](https://forums.sifive.com/t/3d-mmo-engine/6276 "2023-09-02T13:44:26Z")
I managed to compile my MMO engine on the Vision Five 2 but the GPU drivers are still experimental and it renders at 0.5 FPS. Has anyone managed to get a ATI GPU working with their Unmatched and can try to see if perfor… --- ## [SiFive Yocto, kas, and install-buildtools](https://forums.sifive.com/t/sifive-yocto-kas-and-install-buildtools/6199)
**Author:** [@michael67](https://forums.sifive.com/u/michael67)\ **Replies:** 6\ **Last updated:** [August 23, 2023, 5:16pm UTC](https://forums.sifive.com/t/sifive-yocto-kas-and-install-buildtools/6199 "2023-08-23T17:16:52Z")
I’m trying to get SiFive’s “kas” based Yocto system working on an older RedHat installation. The compiler is very old and I need to use “install-buildtools”. However, even after running “install-buildtools” and sourcin… --- ## [Used Hifive Unmatched for Sale](https://forums.sifive.com/t/used-hifive-unmatched-for-sale/6224)
**Author:** [@Suiradal](https://forums.sifive.com/u/Suiradal)\ **Replies:** 1\ **Last updated:** [August 19, 2023, 5:48pm UTC](https://forums.sifive.com/t/used-hifive-unmatched-for-sale/6224 "2023-08-19T17:48:49Z")
Hello, I have a used Hifive Unmatched board I want to sell. I used it for some of my side projects and want to offload it to someone who wants it instead of letting it collect dust. Please message me directly to discuss … --- ## [Recommended Heat Sink(s) and/or Fan(s)](https://forums.sifive.com/t/recommended-heat-sink-s-and-or-fan-s/4430)
**Author:** [@davidpgil](https://forums.sifive.com/u/davidpgil)\ **Replies:** 30\ **Last updated:** [July 16, 2021, 11:40am UTC](https://forums.sifive.com/t/recommended-heat-sink-s-and-or-fan-s/4430 "2021-07-16T11:40:33Z")
Do we have an idea of what are the recommended heatsink and/or fan specs for this board? I have a low profile case and am considering my options. --- ## [Unmatched boot issues](https://forums.sifive.com/t/unmatched-boot-issues/6236)
**Author:** [@yuumei](https://forums.sifive.com/u/yuumei)\ **Replies:** 5\ **Last updated:** [August 9, 2023, 4:17pm UTC](https://forums.sifive.com/t/unmatched-boot-issues/6236 "2023-08-09T16:17:10Z")
Hi all, I was using my unmatched for a while just using Ubuntu. Then one day I couldn’t boot it any more. I have tried debugging: Using both /dev/ttyUSB0 and /dev/ttyUSB1 using baud 115200 - no serial output at all Usi… --- ## [Booting Ubuntu23.04 Error](https://forums.sifive.com/t/booting-ubuntu23-04-error/6187)
**Author:** [@eden](https://forums.sifive.com/u/eden)\ **Replies:** 28\ **Last updated:** [August 1, 2023, 2:18am UTC](https://forums.sifive.com/t/booting-ubuntu23-04-error/6187 "2023-08-01T02:18:02Z")
When booting the ubuntu23.04，the following error has occurred。 200bff8 belongs to the clint。in OpenSBI，bff8 is CLINT\_TIME\_VAL\_OFF So, how do I modify the code and inform os not to handle this address? [Previous page](https://forums.sifive.com/c/hifive-unmatched/16.md) [Next page](https://forums.sifive.com/c/hifive-unmatched/16.md?page=2)