I tested also kernel 3.16.0-77 from linux-headers-generic-lts-utopic linux-image-generic-lts-utopic
and the problem starts from this kernel number also. Here radeon 2.39 is in use. [drm] Initialized radeon 2.39.0 20080528 for 0000:02:00.0 on minor 0 same situation with too big screen resolution but no message about the: "no scaling mode" in xrandr --prop regards LinuxFreak ** Attachment added: "logs 3.16.0-77" https://bugs.launchpad.net/ubuntu/+source/xorg-lts-transitional/+bug/1614442/+attachment/4723938/+files/logs%203.16.0-77 ** Summary changed: - radeon 2.43.0 no scaling mode on RV515 PRO [Radeon X1300/X1550 Series] + radeon 2.39.0 - 2.43.0, no scaling mode on RV515 PRO [Radeon X1300/X1550 Series] -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg-lts-transitional in Ubuntu. https://bugs.launchpad.net/bugs/1614442 Title: radeon 2.39.0 - 2.43.0, no scaling mode on RV515 PRO [Radeon X1300/X1550 Series] Status in xorg-lts-transitional package in Ubuntu: New Bug description: Hi, on ubuntu 14.04 with kernel 3.13.0-93 everything with the screen resolution is fine. (beneath some undeterministic flickering at the startup..) On ubuntu 14.04 with kernel 4.2.0-42 the screen resolution is not working properly. It is too big. One could barely log in (because one could not click on the preferred user to log in, because it is not visible on the screen). Also on Ubuntu 16.04 with kernel 4.4.0-21, and "try ubuntu live"-mode, the screen resolution is not working properly in the same manner. Some testing showed that kernel 3.13 is using: dmesg | egrep 'drm|radeon' [drm] Initialized radeon 2.36.0 20080528 for 0000:02:00.0 on minor 0 which is ok. while ubuntu 14.04 at kernel 4.2 is using: [drm] Initialized radeon 2.43.0 20080528 for 0000:02:00.0 on minor 0 and ubuntu 16.04 at live mode, at kernel 4.4.0-21 is also using: [drm] Initialized radeon 2.43.0 20080528 for 0000:02:00.0 on minor 0 On the failing kernels 4.2 and 4.4 xrandr says: xrandr --prop scaling mode: None supported: None, Full, Center, Full aspect *** while on kernel 3.13 and radeon 2.36.0 there is no output of: "scaling mode: None" *** lspci -nn | grep VGA 02:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] RV515 PRO [Radeon X1300/X1550 Series] [1002:7142] if further logs are needed please tell me. regards Linux Freak To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-lts-transitional/+bug/1614442/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
