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From: bugzilla-daemon@bugzilla.kernel.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 200045] New: i2c-algo-bit: black screen on 'radeon' module probing
Date: Tue, 12 Jun 2018 21:00:45 +0000	[thread overview]
Message-ID: <bug-200045-2300@https.bugzilla.kernel.org/> (raw)

https://bugzilla.kernel.org/show_bug.cgi?id=200045

            Bug ID: 200045
           Summary: i2c-algo-bit: black screen on 'radeon' module probing
           Product: Drivers
           Version: 2.5
    Kernel Version: 4.16
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: cerg2010cerg2010@mail.ru
        Regression: No

Created attachment 276499
  --> https://bugzilla.kernel.org/attachment.cgi?id=276499&action=edit
lspci -v

Hi,

After updating to the 4.16 kernel I started to get a black screen on boot,
without something useful in log. This bug also happens in latest version
(4.17.1). I'm using HP Pavilion dv6-3090er laptop with an exotic ATI/AMD
switchable graphics (radeon 4250 integrated/5650 discrete).

I bisected the issue down to commit 3e5f06bed72fe72166a6778f630241a893f67799
("i2c: algo-bit: init the bus to a known state") and reverting this fixes the
problem. Also loading radeon module with hw_i2c=1 gives me working display with
full brightness, and attempt to change it results in reboot.

Thanks.

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             reply	other threads:[~2018-06-12 21:00 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-06-12 21:00 bugzilla-daemon [this message]
2018-06-13  8:09 ` [Bug 200045] black screen on 'radeon' module probing bugzilla-daemon
2018-06-13  8:13 ` bugzilla-daemon
2018-06-13  9:35 ` bugzilla-daemon
2018-06-13 10:47 ` bugzilla-daemon
2018-06-13 14:12 ` bugzilla-daemon
2018-06-14  1:30 ` bugzilla-daemon
2018-06-14  1:33 ` bugzilla-daemon
2018-06-14 13:09 ` bugzilla-daemon
2018-06-14 13:58 ` bugzilla-daemon
2018-06-14 15:27 ` bugzilla-daemon
2018-06-14 15:47 ` bugzilla-daemon
2018-06-15  5:19 ` bugzilla-daemon
2018-06-15  6:03 ` bugzilla-daemon
2018-06-15 13:28 ` bugzilla-daemon
2018-06-15 14:59 ` bugzilla-daemon
2018-06-16 12:25 ` bugzilla-daemon
2018-06-16 13:22 ` bugzilla-daemon

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