When I start my Toshiba Satellite Pro C850-147 (Intel® Core™ i5-3210M) with O.S. Ubuntu 16.04.1 LTS I get on BIOS screen : [ 1.138599] platform wdat_wdt :failed to claim resource 4 [ 1.138605] ACPI : watchdog : Failed to create platform devices
please attach the acpidump output BTW, what makes you think this is a regression? is there any earlier kernel version that you don't see this message?
I'm using kernel v4.8.9 and before v4.4.30. With these kernels I don't have this BIOS error message.
(In reply to lercoli4670 from comment #2) > I'm using kernel v4.8.9 and before v4.4.30. > With these kernels I don't have this BIOS error message. then it would be good if you can attach the kernel config file you're using for both 4.8.9 and 4.9.0-rc6
Created attachment 245251 [details] kernel_v4.8.9_config_file
Created attachment 245261 [details] kernel_v4.9.0-rc6_config_file
The message comes from a driver that is new in 4.9-rc. Please don't guess things, it isn't helpful.
I'm a Linux user not a Linux developer so my perspective is different of yours. That's all. However, to avoid misunderstandings, I'll never change the Regression listbox anymore.
please attach the acpidump output, which is helpful to debug this issue
Created attachment 245551 [details] acpidump file
Please also attach content of /proc/iomem and /proc/ioports.
Created attachment 245571 [details] iomem file
Created attachment 245581 [details] ioport file
Ah, you need to be root in order to see the offsets. Can you do something like this instead: $ sudo cat /proc/ioports > ioports.txt $ sudo cat /proc/iomem > iomem.txt and attach those.
Created attachment 245591 [details] iomem.txt file
Created attachment 245601 [details] ioports.txt file
Created attachment 245611 [details] wdat_wdt debug patch
Can you try the attached patch? It prints out all the watchdog resources so that we can see the actual conflict. Once you have the patch applied please attach dmesg to this bug.
Could you tell me how to try this attached path ?
Assuming you know how to build the kernel (since you are already using v4.9-rc6): 1. Save the patch somewhere under your Linux source tree 2. Run 'git apply path/to/wdat_wdt.diff' 3. Rebuild the kernel 4. Install the kernel 5. Reboot
I don't build the kernel because I use the .deb files of Ubuntu at http://kernel.ubuntu.com/~kernel-ppa/mainline/.
OK, I think I already know what happens here. The WDAT table uses RTC SRAM (port 0x70 and 0x71) to hold one bit at byte 0x45. That bit is set to one when the watchdog is started, and cleared when it is stopped. That particular I/O region is reserved for RTC according /proc/ioports: 0070-0077 : rtc0 This is the reason why we fail to request it for wdat_wdt. I'm not sure if this can be fixed easily because we really should not touch the RTC registers (even if those are not related to the RTC core functionality) from WDAT driver behind the RTC driver's back.
Well, this is a tough one. The driver does the right thing IMO, except that the messages might be less confusing.
OK thanks. I think I'll submit a patch changing [ 1.138605] ACPI : watchdog : Failed to create platform devices to something like [ 1.138605] ACPI : watchdog : WDAT device creation failed or similar. Maybe it is worth printing the conflicting resource in platform_device_create() as well.
Is there a workaround for my Toshiba/Ubuntu to use kernel v4.9.x ?
It is just a warning. Your system should work just fine but you cannot use WDAT watchdog on that.
I've checked watchdog on terminal and it's not installed on my Ubuntu so it should work.
Ok, with kernel v4.9.0-rc7 it works. Thank You.
How is this closed it's still happening through 3.10.x toshiba Satelite here too
*4.10.3+
I've tested it on kernel v4.10.4 and it works(Ubuntu 16.10).