rtl8821ce
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tomaspinho
8821c sees mainline support in rtw88
Hi, I just want to share with you great news, which I discovered. As of today initial support for rtl8821c was published for mainline kernel (in rtw88 driver). Here are kernel patches: https://patchwork.kernel.org/patch/11559307/ https://patchwork.kernel.org/patch/11559297/ https://patchwork.kernel.org/patch/11559301/ https://patchwork.kernel.org/patch/11559299/ https://patchwork.kernel.org/patch/11559303/ https://patchwork.kernel.org/patch/11559295/ https://patchwork.kernel.org/patch/11559293/ And here is the firmware: https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/commit/?id=401bd6defb64ebbaf3b020f30f2ac3735d3a0c0f Best regards and have fun!
This is great news! I intend to archive this repository once the new rtw88 is available in a stable mainline release and proven to be working.
I installed linux-firmware-git and applied the patches to v5.7-rc7 (after fixing some rejections) but the driver isn't working. Perhaps it depends on something else I'm missing. There's a pull request for v5.8 that adds support for 8723DE, but not 8821CE. Hopefully it'll be added later.
I will probably give it a try, when it will be merged to wireless-drivers-next tree: https://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers-next.git
There is already second version of initial patches: https://patchwork.kernel.org/cover/11575267/ And five additional patches: https://patchwork.kernel.org/cover/11575281/ From the message of those new patches: " After this set, the RTL8821CE device is supported by rtw88. " So hopefully it will be ready soon.
OpenSUSE has now included the firmware in TW
https://build.opensuse.org/package/rdiff/openSUSE:Factory/kernel-firmware?linkrev=base&rev=143
/rtw8821c_fw.bin
I tried the new patches on v5.7 but there are some compilation errors so I'll keep waiting.
Another update to patches: https://patchwork.kernel.org/cover/11585415/ https://patchwork.kernel.org/cover/11585439/
Hi,
I found the repo mentionned by Larry Finger in the link of Isvincent : https://github.com/lwfinger/rtlwifi_new
As I understand, if you want to give it a try you should refer to the README file of the rtw88 branch. Also, check the repo issues, there's already a user (mentionned in the link of Isvincent) who's trying to build the driver and Larry helps him.
I think that this user did not succeded yet but somebody may have the courage to try
Hi,
I tried to build the driver from the repo I shared in my last post. No problem during the build but it throws some errors when loading it (see issue #608 of the repo). I will rebuild as soon as there improvements.
Yes, it builds fine on Gentoo kernel 5.7.1 but does not work, loads with errors:
[ 2.324824] rtw_8821ce 0000:01:00.0: enabling device (0000 -> 0003) [ 2.329142] rtw_8821ce 0000:01:00.0: Firmware version 24.5.0, H2C version 12 [ 2.350506] rtw_8821ce 0000:01:00.0: rfe 4 isn't supported [ 2.350612] rtw_8821ce 0000:01:00.0: failed to setup chip efuse info [ 2.350615] rtw_8821ce 0000:01:00.0: failed to setup chip information
8821CE is entirely broken on v5.8-rc1 since the aforementioned error occurs with both the rtlwifi_new repo and the kernel patches, and this repo doesn't even build.
Release Candidates are release candidates for a reason :)
Mind posting the build logs in a new issue?
Yes, it builds fine on Gentoo kernel 5.7.1 but does not work, loads with errors:
[ 2.324824] rtw_8821ce 0000:01:00.0: enabling device (0000 -> 0003) [ 2.329142] rtw_8821ce 0000:01:00.0: Firmware version 24.5.0, H2C version 12 [ 2.350506] rtw_8821ce 0000:01:00.0: rfe 4 isn't supported [ 2.350612] rtw_8821ce 0000:01:00.0: failed to setup chip efuse info [ 2.350615] rtw_8821ce 0000:01:00.0: failed to setup chip information
Apparently mine is "rfe 4", whatever it means. I added it as suggested but it crashes during boot. I think I'll go with voiding the warranty of the laptop and just putting some half mini pci atheros card. This is the first hardware not working in main line linux I got in more than 7 years. Gentoo kernel 5.7.2
@buboleck You may want to create an issue in the rtlwifi_new/rtw88 repo. We had the same dmesg output concerning 'rfe 2' and it has been corrected.
The driver from this repo now builds correctly but crashes after loading because of null pointer dereference bugs, we are currently trying to patch this while waiting for realtek devs to properly initialize the 8821ce chip data.
Hi everybody,
I'm sending this message throug a rtl8821ce chip using the rtw88 driver of the repo of L. Finger on a archlinux machine with kernel 5.7.3-arch1-1 ! It's hopefully the driver that will be shipped in kernel 5.8 (Realtek still has some work to do though).
If you want to give it a try :
- Clone the rtw88 branch of the repo
- make && sudo make install
- blacklist all other conflicting drivers (such as the one from this repo)
- reboot This protocol is also in the README file of the rtw88 branch.
The mentioned driver is working now, although it doesn't work any better than this one. For example it still takes several seconds (~25 since pressing something on the keyboard) after waking up from sleep to reconnect. Does anybody else have this issue too?
I noticed when the network is configured to take IP address via DHCP it is slow to connect, if set to static IP connects immediately. BTW the same behavior is on MS. I also noticed another strange thing, if I set fixed IP address in the router DHCP the connection fails, both on linux and windows. Windows obtains the DNS hotsname etc but fails to set the IP address.
The RTW88 is still not working for me.
@tomaspinho my other devices connect fine, this is new laptop I got 2-3 weeks ago. I even tested with old dlink router with dd-wrt still the same.
Even on the same device in Windows it reconnects immediately, only in Linux it takes almost half a minute.
It's maybe slower on startup yes, and it seems that it has some trouble connecting to a low strength signal. But it's only an indev version with patches so it can't be as efficient as a release version. Larry told that he will communicate with the realtek devs about the bugs we found so that they can properly finish the job. He also said that this driver hasn't been merged in a kernel tree yet, but someone from linux.org told me that a driver will be merged in kernel 5.8. Anyway the mainline driver is on a good way.
He also said that this driver hasn't been merged in a kernel tree yet, but someone from linux.org told me that a driver will be merged in kernel 5.8.
Can it be merged even if the RCs don't have it? I am running RC2 right now and I had to install the rtw88 driver manually.
The rtw88 driver from @lwfinger's repo is not ready for mainstream use. For me, it works fine on Arch with 5 GHz wifi, but it provides poor connections for 2.4 GHz wifi. The rtl8821ce driver from @tomaspinho's repo works well for me on 2.4 and 5 GHz.
Would it be easily possible to use tomaspinho's driver over rtw88 once the driver has become available?
On Wed, Jul 29, 2020 at 10:40 AM ObserverOfTime [email protected] wrote:
I suppose that will be fixed by the time it makes it into v5.9.
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@ukbeast Yes, it will be. However, I will stop maintaining this rtl8821ce when rtw88 is released as part of a stable release of kernel 5.8.