Re: [REGRESSION] rtsx_usb_sdmmc: RTS5129 (0bda:0129) no longer detects SD card

["Philipp Jonas" <pjjonas@web.de>]

On Wed Nov 11, 2026 at 10:06 AM CET, Thorsten Leemhuis wrote:
> On 11/8/26 19:51, Philipp wrote:
>> 
>> the SD card in the internal Realtek RTS5129 USB card reader
>> (0bda:0129) of my Lenovo V110-15IKB is no longer detected.
>> 
>> Works:  6.12.116, 7.2.x
>> Broken: 6.18.x, 7.3.3
>> 
>> On broken kernels rtsx_usb and rtsx_usb_sdmmc load and the platform
>> devices rtsx_usb_sdmmc.0.auto / rtsx_usb_ms.1.auto exist, but no
>> mmc host/card appears (no mmc0, no mmcblk0) and there are no errors
>> in dmesg. Reloading rtsx_usb / rtsx_usb_sdmmc, re-inserting the card
>> and disabling USB autosuspend (power/control=on) do not help.
>> 
>> Since 7.2.x worked but 6.18.x does not, I suspect a change that was
>> backported to stable.
>
> Might, but might not -- and I wonder if you have two bugs, some race, or
> if some .config setting is disturbing something. Overall this situations
> is somewhat puzzling. The best way to bring some light into this is afaics:
>
> Check if 7.2 is working; if it is, bisect between that and 7.3.3; of
> not, bisect between 7.2 and 7.2.x to find what fixes things. And ensure
> to use the same .config as a base during the bisection, as explained here:
> https://docs.kernel.org/admin-guide/verify-bugs-and-bisect-regressions.html
>
> dmesg outputs from a working and a not-that-different version that is
> broken (say 7.2 and 7.3.3) would be helpful, too.
>
> Ciao, Thorsten

Thanks Thorsten, will do. I'll check 7.2 first and report back
with dmesg outputs and, if needed, bisection results. This may
take a few days, as kernel builds take a while here.

Philipp