|Summary:||garbled video after resume from suspend on Dell Inspiron 4150 - ATI Radeon|
|Product:||Drivers||Reporter:||Tyler Kinkade (tkinkade)|
dmesg -s40000 output
lspci -vv output
cat /proc/interrupts output
Description Tyler Kinkade 2006-09-11 09:07:37 UTC
Most recent kernel where this bug did not occur: N/A Distribution: Ubuntu 6.6 Hardware Environment: Dell Inspiron 4150 (laptop) Software Environment: Ubuntu Problem Description: Garbled video, large square mouse cursor, or no video output at all after resume from suspend. Only option is to power-down by pulling power. Steps to reproduce: Suspend via log-off/quit menu, close lid, resume by opening lid.
Comment 1 Tyler Kinkade 2006-09-11 09:09:00 UTC
Created attachment 8986 [details] dmesg -s40000 output
Comment 4 Tyler Kinkade 2006-09-11 09:12:10 UTC
Created attachment 8989 [details] cat /proc/interrupts output
Comment 5 Len Brown 2006-09-11 11:18:20 UTC
Video restore on resume is not part of ACPI. The BIOS is responible for re-enabling the back-light, and the graphics driver is responsible for re-enabling the video mode. > 0000:01:00.0 VGA compatible controller: ATI Technologies Inc Radeon Mobility M7 LW [Radeon Mobility 7500] (prog-if 00 [VGA]) On this system, you want ty try the latest ATI Radeon driver.
Comment 6 Matthew Garrett 2006-09-27 16:17:28 UTC
This isn't a kernel issue at the moment, though I must disagree with Len's claim that it's the BIOS's job to reenable the backlight - the spec doesn't require that.
Comment 7 Len Brown 2006-09-27 17:37:10 UTC
Matthew, The ACPI spec does not mention restoring the LCD backlight and video modes on resume from S3 because those functions have nothing at all to do with ACPI. However, independent of the ACPI spec, Intel's official guidance to BIOS writers is that they should restore the video backlight on resume form S3. Windows doesn't require this because it always has a graphics driver. Linux, however, does require this, since it may or may not have a graphics driver running. Vendors are welcome to listen or ignore Intel's guidance. However, if they want to ship Linux with a Centrino logo, they must listen, else they'll fail the brand compliance test. Of course, the number of laptop vendors that actually ship Linux installed at the factory and get the logo today is very small -- but hopefully it will grow.
Comment 8 Tyler Kinkade 2006-09-28 10:06:09 UTC
Len, Thank you for your suggestion re: graphic driver/bios. I believe I have the most recent ati radeon driver for my card installed: xserver-xorg-driver-ati 1:220.127.116.11-0ubuntu7. (I have read that the ati fglrx does not support my video card.) And I have the most recent vendor (DELL) supplied BIOS. I was able to resume successfully from suspend via a shell script that employs vbetool; however, I have no idea how to incorporate that into the existing acpi suspend/resume scripts due to my noobishness. Where is the most appropriate place to file a bug for this issue please? Is this a graphic driver issue? An acpi issue? A distro issue? Thank you in advance.
Comment 9 Rafael J. Wysocki 2006-09-29 10:02:56 UTC
You may want to try the s2ram tool (see http://en.opensuse.org/S2ram).
Comment 10 Pavel Machek 2006-10-08 13:17:28 UTC
If vbetool helps, s2ram should work. If not, contact suspend-devel@sf...