"Timeout waiting for hardware interrupt" on Lenovo Thinkpad Tablet 10

"Timeout waiting for hardware interrupt" on Lenovo Thinkpad Tablet 10

[Sébastien Bourdeauducq]

Hi,

Under Linux, the most annoying problem that the Lenovo Thinkpad Tablet
10 has is the unreliable eMMC.

I intermittently get an error "mmc0: Timeout waiting for hardware
interrupt" followed by a crash of the machine (when the eMMC is used as
rootfs).

I have been able to work around this issue with kernel 3.13.0 by passing
the debug_quirks2=0xc0 option to the sdhci module, which disables the
HS200 and DDR50 transfer modes. The read data rate (as measured by
hdparm -t) drops from 119MB/s to 42MB/s, but at least the computer no
longer crashes every 20 minutes and my files are not corrupted anymore.

Unfortunately, with more recent kernels such as 3.18.4, the sdhci module
(still with debug_quirks2=0xc0) appears to select another problematic
transfer mode. The read data rate jumps to 65MB/s and the bug manifests
itself again.

What changes in sdhci between 3.13.0 and 3.18.4 could cause that? I'd
like to be able to use the eMMC reliably at least at 42MB/s using recent
kernels, which hopefully will introduce fixes for the gazillion other
problems that this crippled machine has under Linux (absolutely nothing
works correctly except the CPU, display and USB).

Thanks,
Sébastien

Re: "Timeout waiting for hardware interrupt" on Lenovo Thinkpad Tablet 10

[Simon Raffeiner (SCC)]

Hello Sébastien,

I own a Lenovo Thinkpad Tablet 8, which is quite similar to the Thinkpad
Tablet 10, and we seem to run into the same issues with both devices.

I am currently trying to install Ubuntu 15.04 using an USB stick, so my
kernel version is 3.18.0-12-generic (which is based on the 3.18.3
upstream stable kernel).

As you reported, the tablet reliably freezes after about 15 to 20
minutes, regardless if "debug_quirks2=0xc0" is set or not. The last
kernel message is "mmc0: Timeout waiting for hardware interrupt". But in
my case, the tablet also crashes if the eMMC storage is not used as the
root filesystem, it also happens in the live environment booted off the
USB stick, e.g. when trying to do an mkfs on one of the eMMC partitions.

Thanks a lot for reporting this issue, I was already about to send the
device back because I thought the eMMC was broken.

regards,
Simon




Sébastien Bourdeauducq wrote:

> Hi,
>
> Under Linux, the most annoying problem that the Lenovo Thinkpad Tablet
> 10 has is the unreliable eMMC.
>
> I intermittently get an error "mmc0: Timeout waiting for hardware
> interrupt" followed by a crash of the machine (when the eMMC is used
> as rootfs).
>
> I have been able to work around this issue with kernel 3.13.0 by
> passing the debug_quirks2=0xc0 option to the sdhci module, which
> disables the HS200 and DDR50 transfer modes. The read data rate (as
> measured by hdparm -t) drops from 119MB/s to 42MB/s, but at least the
> computer no longer crashes every 20 minutes and my files are not
> corrupted anymore.
>
> Unfortunately, with more recent kernels such as 3.18.4, the sdhci
> module (still with debug_quirks2=0xc0) appears to select another
> problematic transfer mode. The read data rate jumps to 65MB/s and the
> bug manifests itself again.
>
> What changes in sdhci between 3.13.0 and 3.18.4 could cause that? I'd
> like to be able to use the eMMC reliably at least at 42MB/s using
> recent kernels, which hopefully will introduce fixes for the
> gazillion other problems that this crippled machine has under Linux
> (absolutely nothing works correctly except the CPU, display and USB).
>
> Thanks,
> Sébastien

Re: "Timeout waiting for hardware interrupt" on Lenovo Thinkpad Tablet 10

[Sébastien Bourdeauducq]

On 02/02/2015 09:38 PM, Simon Raffeiner (SCC) wrote:
> I am currently trying to install Ubuntu 15.04

Another bug with the Ubuntu installer on this pesky computer is it
attempts to access the rpmb partition, fails, and aborts the
installation. For some reason, debug_quirks2=0xc0 also works around this
problem.

> the tablet also crashes if the eMMC storage is not used as the
> root filesystem, it also happens in the live environment booted off the
> USB stick, e.g. when trying to do an mkfs on one of the eMMC partitions.

I also experienced freezes when booted from a Arch Linux USB stick
(2015.01.01 with 3.17.6 kernel), and I gave up and went for Ubuntu where
strangely enough those crashes did not happen. I don't know if they are
related to the eMMC as I was not able to get any kernel message (the
machine simply stops responding completely).

Sébastien

Re: "Timeout waiting for hardware interrupt" on Lenovo Thinkpad Tablet 10

[Simon Raffeiner (SCC)]

Hello everybody,

is there a "safe" combination of parameters for sdhci.debug_quirks and
sdhci.debug_quirks2 which should work in all cases, sacrificing performance?

regards,
Simon


Am 02.02.2015 um 15:06 schrieb Sébastien Bourdeauducq:
> On 02/02/2015 09:38 PM, Simon Raffeiner (SCC) wrote:
>> I am currently trying to install Ubuntu 15.04
> 
> Another bug with the Ubuntu installer on this pesky computer is it
> attempts to access the rpmb partition, fails, and aborts the
> installation. For some reason, debug_quirks2=0xc0 also works around this
> problem.
> 
>> the tablet also crashes if the eMMC storage is not used as the
>> root filesystem, it also happens in the live environment booted off the
>> USB stick, e.g. when trying to do an mkfs on one of the eMMC partitions.
> 
> I also experienced freezes when booted from a Arch Linux USB stick
> (2015.01.01 with 3.17.6 kernel), and I gave up and went for Ubuntu where
> strangely enough those crashes did not happen. I don't know if they are
> related to the eMMC as I was not able to get any kernel message (the
> machine simply stops responding completely).
> 
> Sébastien