[Bug 196121] New: ati x200m on Toshiba Sattellite L20-183 cannot resume from suspend with KMS

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=196121

            Bug ID: 196121
           Summary: ati x200m on Toshiba Sattellite L20-183 cannot resume
                    from suspend with KMS
           Product: Drivers
           Version: 2.5
    Kernel Version: 4.11.5
          Hardware: i386
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri at kernel-bugs.osdl.org
          Reporter: soprwa at gmail.com
        Regression: No

Created attachment 257073
  --> https://bugzilla.kernel.org/attachment.cgi?id=257073&action=edit
Possible fix

I,am running Gentoo on Toshiba Sattellite L20-183 with ati x200m (RS410) and
Pentium M 760 onboard. Machine cannot resume from suspend getting hard
locked-up. I have to turn it off by pressing power button. 
There is nothing inside the logs.
Previously passing "nomodeset" parameter to kernel worked. Now, when ati Xorg
driver cannot be started without KMS, "nomodeset" method doesnt work anymore. 
I think that radeon driver needs a quirk to make machine resume from suspend.

With this patch applied to kernel tree Laptop can resume from suspend.

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