[SRU] [F] [linux-firmware] [PATCH 0/1] Fix an issue that HID devices are not scanned by Realtek 8822C

Kai-Heng Feng kai.heng.feng at canonical.com
Tue Jul 7 16:12:55 UTC 2020



> On Jul 7, 2020, at 19:09, Juerg Haefliger <juerg.haefliger at canonical.com> wrote:
> 
> On Tue, 7 Jul 2020 18:07:38 +0800
> Kai-Heng Feng <kai.heng.feng at canonical.com> wrote:
> 
>>> On Jul 7, 2020, at 14:28, Juerg Haefliger <juerg.haefliger at canonical.com> wrote:
>>> 
>>> On Mon, 6 Jul 2020 17:09:24 +0800
>>> Kai-Heng Feng <kai.heng.feng at canonical.com> wrote:
>>> 
>>>>> On Jul 6, 2020, at 16:24, You-Sheng Yang <vicamo.yang at canonical.com> wrote:
>>>>> 
>>>>> Shouldn't we apply this to Eoan and Bionic as well?    
>>>> 
>>>> Because there's no guarantee that new firmware works under older kernels, like many firmware introduced regressions happened before.  
>>> 
>>> What about adding the updated fw with a different name and modify the hwe
>>> kernel to load that blob?  
>> 
>> It can be done, but we need to maintain an extra tree for HWE kernel...
> 
> Isn't this bionic:linux-hwe-5.4? Or am I missing something?

Can you please point out where the tree is?
I do find bionic:hwe-5.4 but it only contains packaging stuff.

> 
> 
>>> Or is that not worth the effort?  
>> 
>> I'd say it's not worth it :)
> 
> Your typical hwe kernel user might disagree with you ;-) Does this work with
> the 4.15 kernel but not with the 5.4 hwe kernel? If so then it's a regression.

It didn't work for 4.15.
At that time we were using out-of-tree Realtek Bluetooth driver, because in-tree driver doesn't have complete feature set, which includes proper HID support.

Kai-Heng

> 
> ...Juerg
> 
> 
>> Kai-Heng
>> 
>>> 
>>> ...Juerg
>>> 
>>> 
>>>> Kai-Heng
>>>> 
>>>>> 
>>>>> You-Sheng Yang
>>>>> 
>>>>> On 2020-07-06 15:52, Kai-Heng Feng wrote:    
>>>>>> BugLink: https://bugs.launchpad.net/bugs/1886390
>>>>>> 
>>>>>> [Impact]
>>>>>> HID devices are not scanned by Realtek 8822C Bluetooth, so keyboard or
>>>>>> mouse cannot connect to the host.
>>>>>> 
>>>>>> [Fix]
>>>>>> New firmware release for 8822C.
>>>>>> 
>>>>>> [Test]
>>>>>> HID devices can be scanned now. Pairing and connecting also work.
>>>>>> 
>>>>>> [Regression Potential]
>>>>>> Low. It's an upstream firmware release.
>>>>>> 
>>>>>> Max Chou (1):
>>>>>> rtl_bt: Update RTL8822C BT FW to 0x0999_3AA1
>>>>>> 
>>>>>> rtl_bt/rtl8822cu_fw.bin | Bin 54320 -> 55296 bytes
>>>>>> 1 file changed, 0 insertions(+), 0 deletions(-)
>>>>>> 
>>>>> 
>>>>> -- 
>>>>> kernel-team mailing list
>>>>> kernel-team at lists.ubuntu.com
>>>>> https://lists.ubuntu.com/mailman/listinfo/kernel-team    




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