ok, I added

blacklist=mmc_block

to the end of my /etc/default/grub file then ran "sudo grub2-mkconfig -o
/boot/grub2/grub.cfg"

on rebooting I examined the grub commands and it showed the kernel was
being booted with the blacklist option.  This blacklist did not fix the
problem.  The card still is unrecognized after suspend.  I removed the
kernel option.

I also tried adding "blacklist=mmc_block blacklist=mmc_core
blacklist=rtsx_pci_sdmmc"  to grub when booting with no effect. modinfo
shows mmc_block and rtsx_pci_sdmmc both depend on mmc_core


before suspend, as root, these commands attach and detach the SD card
successfully:
echo -n mmc0:aaaa > /sys/bus/mmc/drivers/mmcblk/bind
echo -n mmc0:aaaa > /sys/bus/mmc/drivers/mmcblk/unbind

After suspend, the above commands give the error "bash: echo: write error:
No such device"

before the first suspend:
 "sudo modprobe -r mmc_block" doesn't have much effect when the SD card is
removed.
This command resets the machine if the SD card is inserted and attached.

after the first suspend:
sudo modprobe -r mmc_block
and
sudo modprobe mmc_block
don't seem to have any effect.




On Sun, Apr 22, 2018 at 8:49 AM, awokd <[email protected]> wrote:

> On Sat, April 21, 2018 9:44 pm, Brian Deery wrote:
>
> > One quirk that might have an easy fix is my SD card.
>
> >
> > according to the logs, it looks like mmc_block, as well as several other
> > modules have trouble with suspending.  Is there a module to blacklist or
> > some other easy fix for this?
>
> Check out https://www.qubes-os.org/doc/wireless-troubleshooting/. It might
> apply to your SD card too. I looked at your logs but couldn't really tell
> which module you'd want to try to blacklist- it would be the equivalent of
> iwlwifi for SD cards. Maybe "mmc0"?
>
>
>

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