I've just installed F28 beta on my Cube Mix Plus tablet. It seems to work but a sequence of messages keep showing up in the dmesg outputnevery 10 seconds.

[ 537.896013] mmc1: Timeout waiting for hardware cmd interrupt. [ 537.896023] mmc1: sdhci: ============ SDHCI REGISTER DUMP =========== [ 537.896037] mmc1: sdhci: Sys addr: 0x00000000 | Version: 0x00001002 [ 537.896048] mmc1: sdhci: Blk size: 0x00000000 | Blk cnt: 0x00000000 [ 537.896053] mmc1: sdhci: Argument: 0x00000000 | Trn mode: 0x00000000 [ 537.896059] mmc1: sdhci: Present: 0x000a0001 | Host ctl: 0x00000001 [ 537.896065] mmc1: sdhci: Power: 0x0000000e | Blk gap: 0x00000080 [ 537.896070] mmc1: sdhci: Wake-up: 0x00000000 | Clock: 0x0000e8c7 [ 537.896075] mmc1: sdhci: Timeout: 0x00000000 | Int stat: 0x00000000 [ 537.896081] mmc1: sdhci: Int enab: 0x00ff0043 | Sig enab: 0x00ff0043 [ 537.896086] mmc1: sdhci: AC12 err: 0x00000000 | Slot int: 0x00000000 [ 537.896092] mmc1: sdhci: Caps: 0x7568c881 | Caps_1: 0x00000807 [ 537.896097] mmc1: sdhci: Cmd: 0x00000102 | Max curr: 0x00000000 [ 537.896103] mmc1: sdhci: Resp[0]: 0x00000000 | Resp[1]: 0x00000000 [ 537.896108] mmc1: sdhci: Resp[2]: 0x00000000 | Resp[3]: 0x00000000 [ 537.896112] mmc1: sdhci: Host ctl2: 0x00000000 [ 537.896118] mmc1: sdhci: ADMA Err: 0x00000000 | ADMA Ptr: 0x0000000000000000 [ 537.896121] mmc1: sdhci: ============================================

This looks to me as if it is trying to open the SD card (but there is no SD card in the slot).

Here's the part of dmesg output where the slot is recognized:

[ 2.093265] sdhci: Secure Digital Host Controller Interface driver [ 2.093267] sdhci: Copyright(c) Pierre Ossman [ 2.111345] sdhci-pci 0000:00:1e.4: SDHCI controller found [8086:9d2b] (rev 21) [ 2.111363] sdhci-pci 0000:00:1e.4: enabling device (0000 -> 0002) [ 2.112328] mmc0: SDHCI controller on PCI [0000:00:1e.4] using ADMA 64-bit [ 2.112348] sdhci-pci 0000:00:1e.6: SDHCI controller found [8086:9d2d] (rev 21) [ 2.112364] sdhci-pci 0000:00:1e.6: enabling device (0000 -> 0002)

Why would it do this?